Double rotary scroll compressor

Abstract

A dual-rotation scroll compressor capable of maintaining high durability while suppressing large size is provided. In the compressor of the present invention, a drive scroll member (30), a driven scroll member (40), and a drive mechanism (10) are housed in a scroll chamber (65). In addition, a protrusion (64) is provided in the scroll chamber (65). The protrusion (64) has a lubricating oil passage (7) for supplying lubricating oil (18) to the drive scroll member (30). In addition, a guide portion (71) is provided in the scroll chamber (65). The guide portion (71) guides the lubricating oil (18) flowing in the scroll chamber (65) by the propulsive force in the rotational direction (R1) generated by the rotation of the drive scroll member (30), the driven scroll member (40), and the drive mechanism (10) to a position above the lubricating oil passage (7) and towards the lubricating oil passage (7).

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 appropriately referred to as a compressor). This compressor includes a housing, a driving scroll member, a driven scroll member, a drive mechanism, and a driven mechanism. The housing has a scroll chamber that houses the drive mechanism, the driving scroll member, and the driven scroll member. Fluid is drawn into the scroll chamber from outside the housing. Specifically, in this document, the fluid is a refrigerant.

[0003] The drive mechanism has a stator and a rotor. The stator is cylindrical and its outer periphery is fixed to a housing. The rotor is disposed on the inner periphery of the stator. The drive scroll member has a cylindrical extension. The rotor is fixed to the outer periphery of the extension. Thus, the drive scroll member can be driven to rotate about a drive axis by the rotation of the rotor. The driven scroll member is eccentric relative to the drive scroll member and can be driven to rotate about a driven axis by the drive scroll member and the driven mechanism. These drive scroll members and driven scroll members form a compression chamber that compresses the fluid by the drive rotation and the driven rotation.

[0004] Furthermore, in this compressor, a protrusion is integrally provided within the outer casing. The protrusion is located within the scroll chamber and protrudes toward the driving and driven scroll members along the drive axis. The protrusion extends into the interior of the extension. Thus, the protrusion, via a bearing, supports the extension and, consequently, the driving scroll member, enabling rotation. Additionally, a fluid passage extending along the drive axis is formed inside the protrusion. This fluid passage communicates with the compression chamber on one side in the drive axis direction and with the exterior of the outer casing on the other side.

[0005] In this compressor, fluid in the scroll chamber is drawn into the compression chamber and compressed. The compressed fluid is then discharged to the outside of the casing, i.e., the outside of the compressor, through a fluid passage.

[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] Although not disclosed in the aforementioned conventional compressors, such compressors generally employ the following method: by providing a lubricating oil passage for the flow of lubricating oil from the scroll chamber separated from the fluid, and supplying lubricating oil to the sliding parts of the driving scroll and driven scroll via this lubricating oil passage, the wear of the driving scroll and driven scroll is suppressed, thereby improving durability.

[0011] However, in the aforementioned conventional compressors, during operation, in addition to the rotor of the drive mechanism, the driving scroll and driven scroll also rotate within the scroll chamber. Therefore, in such compressors, when a lubricating oil passage is provided within the scroll chamber, the lubricating oil is difficult to flow into the lubricating oil passage because it is affected by the propulsive force in the direction of rotation generated by the rotation of these driving scrolls. Consequently, in such compressors, it is difficult to supply lubricating oil to sliding parts through the lubricating oil passage, resulting in insufficient lubrication of the sliding parts and thus hindering durability.

[0012] The present invention was made in view of the above-mentioned prior art, and the problem to be solved is to provide a dual rotary scroll compressor that can exert high durability.

[0013] Methods for solving problems

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

[0015] The housing has a vortex chamber that houses the driving vortex member, the driven vortex member, and the driving mechanism, and draws in fluid.

[0016] The driving scroll component is driven to rotate around the driving shaft via the driving mechanism.

[0017] The driven scroll member is eccentric relative to the driving scroll member and rotates passively about the driven axis via the driving scroll member and the driven mechanism.

[0018] The driving scroll member and the driven scroll member form a compression chamber that compresses the fluid through the driving rotation and the driven rotation.

[0019] Its features are,

[0020] The vortex chamber is provided with a protrusion that extends toward the driving vortex member and the driven vortex member along the direction of the driving axis.

[0021] The drive scroll member is supported on the protrusion in a manner that allows it to rotate about the drive axis.

[0022] The protrusion has a lubricating oil passage for supplying lubricating oil to the driving vortex component.

[0023] A guide is provided in the vortex chamber, which guides the lubricating oil flowing in the vortex chamber through the propulsive force in the rotational direction generated by the rotation of the driving vortex member, the driven vortex member, and the driving mechanism to a position above the lubricating oil passage and towards the lubricating oil passage.

[0024] In the dual rotary scroll compressor of the present invention, the drive scroll member is supported rotatably about the drive axis relative to a protrusion disposed in the scroll chamber, the protrusion having a lubricating oil passage for supplying lubricating oil to the drive scroll member.

[0025] Furthermore, in this compressor, a guide section is provided in the scroll chamber. This guide section guides the lubricating oil flowing within the scroll chamber, propelled by the rotational force generated by the rotation of the driving scroll, driven scroll, and drive mechanism, to a position above the lubricating oil passage and towards it. Therefore, in this compressor, even when the driving scroll, driven scroll, and drive mechanism rotate within the scroll chamber, the lubricating oil within the scroll chamber can still flow appropriately into the lubricating oil passage. Thus, in this compressor, lubricating oil can be appropriately supplied to the sliding parts of the driving scroll and driven scroll through the lubricating oil passage. Consequently, in this compressor, wear on the sliding parts of the driving scroll and driven scroll can be appropriately suppressed.

[0026] Therefore, the dual-rotary scroll compressor of the present invention exhibits high durability.

[0027] In the compressor of the present invention, the outer casing may have a support wall that extends radially along the outer casing and faces the scroll chamber, supporting the protrusion. Preferably, a guide portion is formed in the support wall. In this case, the guide portion can be appropriately provided within the scroll chamber.

[0028] Additionally, in this case, at least one of the support wall and the protrusion may have an inlet communicating with the lubricating oil passage to allow lubricating oil to flow into the lubricating oil passage. Furthermore, preferably, the guide portion has: a first guide path located radially outward of the protrusion, which allows lubricating oil in the vortex chamber to flow upward into the lubricating oil passage by a thrust in the rotational direction; and a second guide path connected to the first guide path, which guides the lubricating oil that has flowed through the first guide path from above the lubricating oil passage toward the inlet.

[0029] This simplifies the configuration of the guide section and allows the lubricating oil in the vortex chamber to flow more appropriately into the lubricating oil passage.

[0030] Preferably, a protective portion is provided in the support wall, which allows the lubricating oil flowing through the first guide path to flow into the second guide path and prevents the lubricating oil from overflowing from the second guide path. In this case, it is possible to properly prevent the lubricating oil flowing through the first guide path from flowing back into the vortex chamber without reaching the second guide path, or the lubricating oil overflowing from the second guide path without reaching the inlet and flowing back into the vortex chamber.

[0031] Preferably, the protective portion is integrally formed on the support wall. In this case, the increase in the number of components can be suppressed, and the protective portion can be easily provided on the support wall.

[0032] The compressor of the present invention may have a mounting body formed in the shape of a plate and mounted on a support wall and located within a scroll chamber. Preferably, at least a portion of a guide portion is formed between the support wall and the mounting body. In this case, the formation of the guide portion is facilitated, and in the portion of the guide portion formed between the support wall and the mounting body, lubricating oil flowing toward the oil reservoir can be appropriately prevented from overflowing from the guide portion.

[0033] Invention Effects

[0034] The dual-rotary scroll compressor of this invention exhibits high durability. Attached Figure Description

[0035] Figure 1 This is a cross-sectional view of the compressor in Example 1.

[0036] Figure 2 The compressor relating to Embodiment 1 is a perspective view of the first outer casing.

[0037] Figure 3 The compressor relating to Embodiment 1 is shown in an enlarged perspective view of the main part of the first outer casing.

[0038] Figure 4 The compressor relating to Embodiment 1 refers to a state in which a cover plate and a gasket are installed on the first outer casing. Figure 3 The same main parts are enlarged in 3D.

[0039] Figure 5 The compressor relating to Embodiment 1 is indicated Figure 4 Enlarged sectional view of the main part of section AA in the image.

[0040] Figure 6 The compressor relating to Embodiment 2 refers to the first outer casing and... Figure 3 The same main parts are enlarged in 3D.

[0041] Explanation of reference numerals in the attached figures

[0042] 6…outer shell

[0043] 7…Lubricating oil passage

[0044] 10… Electric motor (drive mechanism)

[0045] 12…Compression Chamber

[0046] 18…Lubricating oil

[0047] 20…Driven mechanism

[0048] 30…Drive scroll component

[0049] 40…Driven scroll component

[0050] 61…First outer casing (support wall)

[0051] 64…protrusion

[0052] 65… Vortex Chamber

[0053] 71…Guidance Department

[0054] 71a…First Guiding Path

[0055] 71b…Second Guiding Path

[0056] 72…flow inlet

[0057] 75… Cover plate (mount body)

[0058] 77… Protective protrusion (protective section)

[0059] O1…Drive shaft

[0060] O2…driven shaft

[0061] R1…Direction of rotation Detailed Implementation

[0062] 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. The compressor of the present invention is a dual-rotary scroll compressor.

[0063] (Example 1)

[0064] like Figure 1 As shown, the compressor of Embodiment 1 includes a housing 6, an electric motor 10, a driving scroll member 30, a driven scroll member 40, and a driven mechanism 20. The electric motor 10 is an example of the "driving mechanism" in this invention.

[0065] In this embodiment, by Figure 1 The solid arrows shown indicate the compressor's forward / backward and up / down directions. Furthermore, in Figure 2 Later, with Figure 1Correspondingly, the compressor's front-to-back and up-to-down directions are specified. Furthermore, these directions are provided as an example for illustrative purposes, as the compressor can appropriately adjust its posture depending on the vehicle it is mounted on.

[0066] like Figure 1 As shown, the outer casing 6 is composed of an outer casing body 60, a first outer casing cover 61, and a second outer casing cover 62. The first outer casing cover 61 is an example of a "support wall" in this invention. The outer casing body 60, the first outer casing cover 61, and the second outer casing cover 62 are all made of aluminum alloy. Alternatively, the outer casing body 60, the first outer casing cover 61, and the second outer casing cover 62 may be made of steel.

[0067] The outer casing 60 is cylindrical with the drive shaft O1 as its center, and has openings at both the front and rear ends. The drive shaft O1 is parallel to the front-rear direction. A suction port 81 is formed in the outer casing 60. The suction port 81 extends radially along the outer casing 60, connecting the interior of the outer casing 60 to the exterior. The suction port 81 is connected to the evaporator (not shown) via piping (not shown).

[0068] The first outer casing 61 is located behind the outer casing body 60. The first outer casing 61 has a casing body portion 61a and a retaining portion 61b. The casing body portion 61a is generally disk-shaped about the drive shaft O1 and extends radially along the outer casing 6. The casing body portion 61a has a front surface 611 facing forward and a rear surface 612 located on the opposite side of the front surface 611 and facing rearward.

[0069] like Figure 2 As shown, in addition to the eight first bolt holes 613 and two second bolt holes 614 formed on the main body 61a of the cover, a guide portion 71 is also provided. Furthermore, the details of the guide portion 71 will be described later.

[0070] Each first bolt hole 613 is arranged at equal intervals in the circumferential direction of the cover body 61a and penetrates the cover body 61a in the direction of the drive shaft O1. Each second bolt hole 614 is arranged at a position that is radially inner to the outer casing 6 than each first bolt hole 613. Each second bolt hole 614 is formed with a diameter smaller than that of each first bolt hole 613 and penetrates the cover body 61a in the direction of the drive shaft O1. Furthermore, the number and shape of each first bolt hole 613 and each second bolt hole 614 can be appropriately designed.

[0071] The retaining portion 61b is integrally formed on the cover body portion 61a. The retaining portion 61b extends in a cylindrical shape from the front surface 611 of the cover body portion 61a in the direction of the drive axis O1. The retaining portion 61b is composed of a base portion 615 and a top portion 616.

[0072] The base portion 615 forms the rear portion of the retaining portion 61b and is connected to the cover body portion 61a. For example... Figures 1-3 As shown, an inlet 72 is formed at the base end portion 615. The inlet 72 opens on the outer peripheral surface of the base end portion 615 and extends radially along the first outer casing 61 inside the base end portion 615, and opens on the inner peripheral surface of the base end portion 615, i.e., the inner peripheral surface of the retaining portion 61b. The tip portion 616 constitutes the front portion of the retaining portion 61b. The tip portion 616 is connected to the base end portion 615 and extends forward from the base end portion 615. The tip portion 616 is formed into a cylindrical shape with a diameter smaller than that of the base end portion 615.

[0073] like Figure 1 As shown, a protrusion 64 is installed on the first outer casing 61. The protrusion 64 is made of steel. The protrusion 64 is composed of a first diameter portion 64a and a second diameter portion 64b. The first diameter portion 64a constitutes the front portion of the protrusion 64. The diameter of the first diameter portion 64a is smaller than the diameter of the through hole 375 described later. A pin hole 4 is formed in the first diameter portion 64a. The pin hole 4 extends along the direction of the drive shaft O1 inside the first diameter portion 64a and opens at the front end face of the first diameter portion 64a.

[0074] 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.

[0075] The second diameter portion 64b is integral with the rear end of the first diameter portion 64a at its front end. Thus, the second diameter portion 64b constitutes the rear portion of the protrusion 64. The second diameter portion 64b is formed as a bottomed cylindrical shape with a diameter larger than that of the first diameter portion 64a and an opening at the rear. Furthermore, the inner diameter of the second diameter portion 64b is formed to be approximately the same as the outer diameter of the top end portion 616 of the retaining portion 61b. An outlet 73 is formed in the second diameter portion 64b. The outlet 73 penetrates the second diameter portion 64b in the direction of the drive shaft O1. Alternatively, the outlet 73 may also penetrate the second diameter portion 64b radially through the outer casing 6.

[0076] The protrusion 64 allows the tip portion 616 of the retaining portion 61b to pass through the interior of the second diameter portion 64b. Thus, the protrusion 64 is mounted to the first outer casing 61 via the retaining portion 61b, protruding forward from the first outer casing 61 in the direction of the drive shaft O1. Furthermore, because the tip portion 616 is located inside the second diameter portion 64b, the retaining portion 61b retains the protrusion 64 from the inside using the tip portion 616. Although not shown in the figure, the protrusion 64 and the retaining portion 61b are connected by a connecting member. This prevents the protrusion 64 from rotating while mounted on the first outer casing 61. Alternatively, an elastic body capable of elastic deformation can be provided between the second diameter portion 64b and the tip portion 616 in the radial direction of the casing 6 while the protrusion 64 is mounted on the first outer casing 61. Alternatively, the protrusion 64 can be fixed to the first outer casing 61 by embedding the tip portion 616 into the interior of the second diameter portion 64b.

[0077] By mounting the protrusion 64 to the first housing cover 61 in this manner, an oil reservoir 74 is formed inside the protrusion 64. More specifically, the oil reservoir 74 is formed by the interior of the second radial portion 64b and the interior of the retaining portion 61b. The oil reservoir 74 communicates with both an inlet 72 and an outlet 73. Specifically, the inlet 72 communicates with the oil reservoir 74 radially from the rear side of the oil reservoir 74 and above the drive shaft O1. On the other hand, the outlet 73 communicates with the oil reservoir 74 from the front side of the oil reservoir 74 in the direction of the drive shaft O1. Thus, the inlet 72 and the outlet 73 communicate with the oil reservoir 74 at different positions. Furthermore, these oil reservoirs 74 and the outlet 73 form a lubricating oil passage 7. That is, the inlet 72 communicates with the lubricating oil passage 7.

[0078] The second housing cover 62 is disposed in front of the housing body 60. 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 rearward.

[0079] Additionally, a support portion 66 and a discharge port 83 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 into a cylindrical shape centered on the drive shaft O1, and a second radial ball bearing 52, an elastomer 67, and a shaft seal member 63 are disposed inside it. The shaft seal member 63 is disposed inside the support portion 66 at a position forward of the second radial ball bearing 52. The shaft seal member 63 is formed into an annular shape.

[0080] An elastomer 67 is disposed between the support portion 66 and the second radial ball bearing 52, surrounding the second radial ball bearing 52 from the outside and holding the second radial ball bearing 52 within the support portion 66. Alternatively, the second radial ball bearing 52 can be replaced by a sliding bearing disposed inside the support portion 66. Alternatively, the elastomer 67 can be omitted, allowing the support portion 66 to directly hold the second radial ball bearing 52.

[0081] The discharge port 83 extends through the second housing 62 in the direction of the drive shaft O1, connecting the interior of the support 66 with the exterior of the second housing 62. Furthermore, the discharge port 83 is connected to the condenser (not shown) via piping (not illustrated).

[0082] In the outer casing 6, the front surface 611 of the first outer casing 61 abuts against the rear end of the outer casing body 60, and the rear surface 62b of the second outer casing 62 abuts against the front end of the outer casing body 60. At this time, a washer 85 is provided between the first outer casing 61 and the outer casing body 60. Figure 4 As shown, the washer 85 is formed in an annular shape with an outer diameter approximately the same as that of the cover body 61a of the first housing cover 61. The washer 85 has the same number of third bolt holes 85a as the first bolt holes 613. Furthermore, although not shown in the figure, a washer is also provided between the first housing cover 61 and the housing body 60.

[0083] Furthermore, in the housing 6, the housing body 60, the first housing cover 61 and the second housing cover 62 are fixed in the direction of the drive shaft center O1 by bolts (not shown) that are respectively inserted into each of the first bolt holes 613 and each of the third bolt holes 85a.

[0084] Thus, 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 intake port 81. Therefore, refrigerant is drawn into the vortex chamber 65 from the outside of the outer casing 6 through the intake port 81. The refrigerant is an example of a "fluid" in this invention.

[0085] Furthermore, the aforementioned protrusion 64 protrudes from the first outer casing 61 into the scroll 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 scroll member 30 and the driven scroll member 40. The oil reservoir 74 is connected to the scroll chamber 65 via an inlet 72 and an outlet 73. That is, the inlet 72 connects the scroll chamber 65 and the oil reservoir 74 radially in the outer casing 6. On the other hand, the outlet 73 connects the scroll chamber 65 and the oil reservoir 74 in the direction of the drive shaft O1. Furthermore, through these inlets 72 and outlets 73, the scroll chamber 65 and the oil reservoir 74 are connected, thereby achieving approximately the same pressure inside the scroll chamber 65 and the oil reservoir 74.

[0086] like Figure 2 As shown, the guide portion 71 is composed of a first guide path 71a and a second guide path 71b. The first guide path 71a and the second guide path 71b are recessed into the front surface 611 of the cover body portion 61a. Alternatively, the guide portion 71 may have other configurations.

[0087] The first guide path 71a is formed radially on the housing 6 inside each of the first bolt holes 613 and outside the retaining portion 61b. That is, by mounting the protrusion 64 onto the first housing cover 61, the first guide path 71a is formed radially outward of the protrusion 64. The first guide path 71a extends in an arc shape along approximately half a circumference of the first housing cover 61, from a position below the retaining portion 61b and further below the protrusion 64 to a position above the flow inlet 72. In other words, the lower end of the first guide path 71a is located below the drive shaft O1 and the protrusion 64, and the upper end of the first guide path 71a is located above the flow inlet 72.

[0088] like Figure 3 As shown, the upper end of the second guide path 71b is connected to the upper end of the first guide path 71a. Furthermore, the second guide path 71b extends downward toward the inlet 72 via the second bolt holes 614. More specifically, the second guide path 71b extends circumferentially toward the first housing cover 61 with its upper end approaching the upper end of the first guide path 71a. After extending linearly downward between the two second bolt holes 614, the second guide path 71b extends circumferentially toward the first housing cover 61 with its lower end approaching the inlet 72. Furthermore, in Figure 2 and Figure 3 For ease of explanation, illustrations of washers such as 85 have been omitted. (The following will be discussed...) Figure 6 The same applies.

[0089] In addition, such as Figure 4As shown, a cover plate 75 is mounted on the front surface 611 of the cover body 61a. The cover plate 75 is an example of a "mounting body" in this invention. The cover plate 75 is formed of a metal sheet and is mounted to the front surface 611 by bolts 76 inserted into each of the second bolt holes 614. Thus, the cover plate 75 mounted on the front surface 611 is located within the vortex chamber 65. Furthermore, as... Figure 5 As shown, the cover plate 75 covers the second guide path 71b from the vortex chamber 65 side. At this time, the cover plate 75 covers approximately the entire second guide path 71b from the vortex chamber 65 side (refer to...). Figure 4 Alternatively, the cover plate 75 can be made of resin.

[0090] Thus, in the guide section 71, the first guide path 71a is formed only in the cover body 61a, while the second guide path 71b is formed between the cover body 61a and the cover plate 75. In other words, the first guide path 71a is not covered by the cover plate 75. Thus, the first guide path 71a faces into the vortex chamber 65. Furthermore, the mounting of the cover plate 75 relative to the front surface 611 can be omitted.

[0091] like Figure 1 As shown, 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.

[0092] 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.

[0093] 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.

[0094] 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 further 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, a gap is formed between the slits and the outer peripheral surface of the second diameter portion 64b.

[0095] The rotor 11 is cylindrical about the drive shaft O1. Although detailed drawings 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. Furthermore, multiple bolt holes 11a are formed in the rotor 11. Each bolt hole 11a penetrates the rotor 11 in the direction of the drive shaft O1.

[0096] The drive scroll component 30 is housed within the scroll chamber 65. The drive scroll component 30 is made of a metal such as aluminum alloy. The drive scroll component 30 has a drive end plate 31, a drive scroll body 33, a drive peripheral wall 35, a cover 37, and a housing 39.

[0097] 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.

[0098] Furthermore, 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 fixed to the first front surface 311 of the drive end plate 31 by fixing bolts 59. Thus, the discharge reed valve 57 can open and close the discharge port 32. And the retainer 58 can adjust the opening degree of the discharge reed valve 57.

[0099] The driving scroll body 33 is integral with the driving end plate 31 and protrudes rearward from the first rear surface 312, that is, towards the driven scroll member 40, parallel to 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 center and protrudes outward in a scroll shape from the center of the scroll.

[0100] 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 front end of the drive peripheral wall 35 is integral with the outer periphery of the drive end plate 31. Thus, 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.

[0101] The cover 37 has a wall portion 37a, an inner cylindrical portion 37b, and an outer cylindrical portion 37c. The wall portion 37a extends in a generally plate-like shape in the radial direction of the drive vortex member 30. 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.

[0102] Additionally, 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.

[0103] The intake port 374 is located radially outward of the recess 373 relative to the drive vortex member 30, that is, radially outward of the outer casing 6 relative to the recess 373. 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.

[0104] Furthermore, in the wall portion 37a, a plurality of rings 22 are installed at the location 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 six. Figure 1 The diagram shows one of the six rings 22.

[0105] The inner cylindrical portion 37b is located radially inside the stator 17 of the housing 37, extending rearward in a cylindrical shape from the second rear surface 372 of the wall portion 37a in the direction of the drive shaft 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. Additionally, the outer diameter of the inner cylindrical portion 37b can be approximately the same as or larger than the outer diameter of the second radial portion 64b.

[0106] Additionally, a through hole 375 is formed in the cover 37. The through hole 375 extends along the direction of the drive shaft O1, so that the inner cylindrical portion 37b communicates with the recess 373.

[0107] The outer cylindrical portion 37c is integral with the wall portion 37a at its outer periphery. Thus, the outer cylindrical portion 37c is connected to the wall portion 37a and extends rearward in a cylindrical shape from the wall portion 37a in the direction of the drive shaft O1. The outer diameter of the outer cylindrical portion 37c 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.

[0108] Furthermore, the inner diameter of the outer cylindrical portion 37c is larger than the outer diameter of the inner cylindrical portion 37b. Therefore, in the cover 37, the inner cylindrical portion 37b is disposed on the inner circumference of the outer cylindrical portion 37c, separated from the outer cylindrical portion 37c radially from the outer casing 6. Thus, in the cover 37, a receiving portion 38 is formed by the wall portion 37a, the inner cylindrical portion 37b, and the outer cylindrical portion 37c. The receiving portion 38 is a bottomed annular shape with an opening at the rear.

[0109] Furthermore, the suction port 374 formed on the wall portion 37a is located radially on the outer side of the outer casing 6, which is further outward than the inner cylindrical portion 37b and further inward than the outer cylindrical portion 37c. Thus, the suction port 374 communicates with the receiving portion 38 at the location between the inner cylindrical portion 37b and the outer cylindrical portion 37c.

[0110] Furthermore, a plurality of bolt holes 376 are formed in the outer cylindrical portion 37c. Each bolt hole 376 penetrates the outer cylindrical portion 37c in the direction of the drive shaft center O1. Moreover, although not shown in the figure, the number of bolt holes 376 is equal to the number of bolt holes 11a formed in the rotor 11. Figure 1 The diagram shows one of the multiple bolt holes 11a and one of the multiple bolt holes 376.

[0111] The cover 37 abuts the front end of the outer cylindrical portion 37c against the rear end of the drive peripheral wall 35. Additionally, the cover 37 abuts the rotor 11 against the rear end of the outer cylindrical portion 37c. Furthermore, in this state, bolts 34a are inserted from the rotor 11 side in the order of the bolt holes 11a and 376, and the bolts 34a are screwed into the drive peripheral wall 35. Thus, the cover 37 is clamped in the front-rear direction by the drive peripheral wall 35 and the rotor 11, and is fixed to the drive peripheral wall 35 and the rotor 11. As a result, the drive vortex member 30 and the rotor 11 become an integral unit.

[0112] 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.

[0113] 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 orthogonal to the drive shaft O1 and the driven shaft O2. The outer periphery of the front wall 39b is connected to the front end of the outer peripheral wall 39a. Furthermore, a boss 39c is formed on the front wall 39b. The boss 39c is integrally formed at the center of the front wall 39b and protrudes forward from the front wall 39b in the direction of the drive shaft O1. The outer diameter of the boss 39c 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. Additionally, a discharge passage 390 is formed on the boss 39c. The discharge passage 390 extends through the boss 39c in the direction of the drive shaft O1.

[0114] Furthermore, bolt holes 39d are formed in the outer peripheral wall 39a and the front wall 39b. The bolt holes 39d penetrate 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 bolt holes 39d are formed in the outer peripheral wall 39a and the front wall 39b. Figure 1 The diagram shows one of the multiple bolt holes 39d.

[0115] The housing 39 abuts against the rear surface of its outer peripheral wall 39a against the front end of the drive peripheral wall 35. Furthermore, in this state, bolts 34b are inserted into each bolt hole 39d and screwed into the drive peripheral wall 35. Thus, in the drive scroll member 30, the housing 39 is fixed to the drive peripheral wall 35.

[0116] Furthermore, by fixing the housing 39 to the drive peripheral wall 35, a discharge chamber 14 is formed inside the housing 39, that is, inside 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.

[0117] By fixing the housing 39 to the drive peripheral wall 35 in this way, the housing 39 and the cover 37 are arranged separately in the front-rear direction in the drive scroll member 30, separated by the drive end plate 31, the drive scroll body 33, and the drive peripheral wall 35. Furthermore, since the rotor 11 is fixed to the outer cylindrical portion 37c of the cover 37, the housing 39 and the rotor 11 are also arranged separately in the front-rear direction, including the discharge chamber 14.

[0118] 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.

[0119] 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.

[0120] 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 recessed from the third rear surface 412 of the driven end plate 41 and is cylindrical with the driven axis O2 as the center. 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.

[0121] 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.

[0122] Additionally, a rotary pin 21 is fixed in the driven end plate 41 at a position opposite to the ring 22. The rotary pin 21 protrudes rearward from the third rear surface 412. Furthermore, six rotary pins 21 are fixed in the driven end plate 41 in the same number as the rings 22. Figure 1 The diagram shows one of the six slewing pins 21.

[0123] Furthermore, the driven mechanism 20 is constituted by these rotary pins 21 and rings 22. Here, the number of rotary pins 21 and rings 22 can be appropriately designed as long as there are three or more of each. Alternatively, the driven mechanism 20 can also have other configurations.

[0124] The driven scroll body 43 is integral with the driven end plate 41. The third front surface 411 of the driven end plate 41 extends forward parallel to the drive shaft O1 and the driven shaft O2. 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.

[0125] In this compressor, a driven scroll member 40 is housed within the drive scroll member 30, more specifically, between the drive end plate 31, the drive peripheral wall 35, and the cover 37. Furthermore, the drive scroll body 33 and the driven scroll body 43 are engaged. Thus, the drive scroll body 33 and the driven scroll body 43 form a compression chamber 12 facing each other.

[0126] Furthermore, an intake section 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 section 30a. The intake section 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 by the driving end plate 31. In addition, the intake section 30a communicates with the intake port 374.

[0127] Furthermore, by housing the driven scroll member 40 within the driving scroll member 30, each rotary pin 21 enters into each ring 22. Thus, the driving scroll member 30 and the driven scroll member 40 are assembled in the front-rear direction, constituting the scroll compression section 100. Moreover, strictly speaking, after the driving scroll body 33 engages with the driven scroll body 43 and each rotary pin 21 enters 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.

[0128] In addition, by assembling the driving scroll member 30 and the driven scroll member 40, the receiving recess 15 and the driven shaft portion 16 of the driven end plate 41 face each other to the recess 373 of the cover 37.

[0129] 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.

[0130] Furthermore, the first coil end 171 is supported by the cover 37 on the first radial portion 64a, thereby being housed within the receiving portion 38. Thus, the first coil end 171 is covered from the front by the wall portion 37a within the receiving portion 38, and is covered from the radially inner side of the driving vortex member 30 by the inner cylindrical portion 37b. Furthermore, the first coil end 171 is covered from the radially outer side of the driving vortex member 30 within the receiving portion 38 by the outer cylindrical portion 37c.

[0131] Furthermore, the first radial ball bearing 51 is supported by the cover 37 on the first radial portion 64a, so that the first radial ball bearing 51 faces the outlet 73 from the front in the direction of the drive shaft center O1. Thus, in this compressor, within the scroll chamber 65, the first radial ball bearing 51 and the outlet 73 face each other in the direction of the drive shaft center O1.

[0132] 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 37c are arranged sequentially from the drive shaft center O1 side outwards in the radial direction of the drive scroll member 30. Moreover, these first radial portions 64a, the first radial ball bearing 51, the inner cylinder portion 37b, the first coil end portion 171, and the outer cylinder portion 37c are arranged overlapping in the radial direction of the housing 6.

[0133] Furthermore, in the drive scroll member 30, the protrusion 39c 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 is disposed within the scroll chamber 65 and is supported on the outer casing 6 via both the protrusion 64 and the support portion 66 in a manner rotatable about the drive axis O1.

[0134] 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, the driven scroll member 40 is disposed in the scroll chamber 65 and is supported rotatably about the driven axis O2 relative to the first diameter portion 64a of the protrusion 64. That is, unlike the driving scroll member 30, the driven scroll member 40 is supported on the housing 6 only by the protrusion 64 in a manner that allows it to rotate about the driven axis O2.

[0135] In the 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 81. Furthermore, if the electric motor 10 operates and the rotor 11 rotates within the scroll chamber 65, the rotation of the rotor 11 is transmitted to the drive scroll member 30, thus driving the drive scroll member 30 to rotate around the drive axis O1. In other words, the drive scroll member 30 and the rotor 11 rotate together around the drive axis O1. Specifically, the drive scroll member 30 and the rotor 11 rotate around the drive axis O1 in the rotational direction R1 (see reference). Figure 1 (The double-dotted arrow).

[0136] Furthermore, when the drive scroll 30 and the rotor 11 are driven to rotate, in the driven mechanism 20, each rotary 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 each rotary pin 21. In this way, the driven mechanism 20 transmits the torque driving the scroll 30 to the driven scroll 40.

[0137] As a result, the driven scroll member 40 is driven to rotate around the driven axis O2 by driving the scroll member 30 and the driven mechanism 20. Specifically, the driven scroll member 40 is driven to rotate around the driven axis O2 in the rotation direction R1. That is, the driving scroll member 30, the rotor 11, and the driven scroll member 40 rotate in the same direction.

[0138] Furthermore, the driven mechanism 20 restricts the driven scroll member 40 from rotating relative to the driving scroll member 30. Thus, the driven scroll member 40 revolves relative to the driving scroll member 30 about the driven axis O2. Moreover, by driving the scroll body 33 and the driven scroll body 43 to rotate within the intake section 30a, respectively, the volume of the compression chamber 12 is changed.

[0139] The refrigerant drawn into the scroll chamber 65 flows between the rotor 11 and the stator 17 and reaches the housing 38, then is drawn into the compression chamber 12 through the suction port 374 and the suction section 30a. Alternatively, the refrigerant drawn into the scroll chamber 65 also flows through the gaps formed in the stator core 17a and reaches the housing 38, then is drawn into the compression chamber 12 through the suction port 374 and the suction section 30a.

[0140] Furthermore, the refrigerant drawn into the scroll chamber 65 contains lubricating oil 18. In this compressor, as described above, the drive scroll 30 and rotor 11 are driven to rotate within the scroll chamber 65. Therefore, the refrigerant drawn into the scroll chamber 65 is affected by the centrifugal force of the rotating drive scroll 30 and rotor 11, causing the lubricating oil 18 contained within it to separate. Thus, the lubricating oil 18 separated from the refrigerant flows downwards within the scroll chamber 65 due to gravity, reaching the lower part of the scroll chamber 65. Additionally, a portion of the lubricating oil 18 contained in the refrigerant can be drawn into the suction port 374 along with the refrigerant before it separates from the refrigerant.

[0141] Here, in this compressor, a guide portion 71 is provided in the first outer casing 61, so that the guide portion 71 is located inside the scroll chamber 65. Furthermore, as... Figure 2 As shown, the first guide path 71a of the guide portion 71 extends in an arc shape, covering approximately half a circumference of the first outer casing 61, from a position below the retaining portion 61b and further below the protrusion 64 to a position above the inlet 72. Furthermore, the second guide path 71b of the guide portion 71 connects to the upper end of the first guide path 71a and extends downward toward the inlet 72.

[0142] Therefore, as Figure 2 and Figure 4 As shown by the solid arrow, the first guide path 71a uses the propulsive force in the rotational direction R1 generated by the rotation of the driving scroll 30, the driven scroll 40, and the rotor 11 to guide the lubricating oil 18 from the lower part of the scroll chamber 65 to a position above the inlet 72. Furthermore, the second guide path 71b guides the lubricating oil 18 guided by the first guide path 71a to flow within itself, thereby guiding it to the inlet 72 using gravity.

[0143] In this way, even when the scroll member 30, the driven scroll member 40 and the rotor 11 are driven to rotate in the scroll chamber 65, the lubricating oil 18 that has separated from the refrigerant and reached the lower part of the scroll chamber 65 can be properly circulated to the lubricating oil passage 7 through the guide 71 and the inlet 72.

[0144] The lubricating oil 18 that flows from the inlet 72 into the lubricating oil passage 7 is stored in the oil reservoir 74. Furthermore, the inlet 72 opens within the vortex chamber 65, allowing a portion of the refrigerant within the vortex chamber 65 to also flow from the inlet 72 into the lubricating oil passage 7. Thus, the lubricating oil 18 contained within this refrigerant is also stored in the oil reservoir 74.

[0145] Furthermore, in the lubricating oil passage 7, the lubricating oil 18 stored in the oil reservoir 74 flows out from the outlet 73 sequentially into the outside of the protrusion 64, i.e., into the vortex chamber 65. At this time, the outlet 73 and the first radial ball bearing 51 are opposite each other in the direction of the drive shaft O1. Therefore, the lubricating oil 18 flowing out from the outlet 73 can properly lubricate not only the first radial ball bearing 51, but also the sliding part between the first radial ball bearing 51 and the first radial portion 64a, i.e., the sliding part between the drive vortex member 30 and the protrusion 64. In this way, the lubricating oil 18, after lubricating the first radial ball bearing 51, etc., together with the refrigerant flowing toward the suction port 374, is drawn into the compression chamber 12 from the suction port 374 via the suction portion 30a.

[0146] In addition, a portion of the lubricating oil 18, after lubricating the first radial ball bearing 51, reaches the space between the cover 37 and the driven end plate 41 via the through hole 375, thereby lubricating not only the space between the cover 37 and the driven end plate 41, but also the bushing 53 and the sliding bearing 13. The lubricating oil 18, after lubricating the sliding bearing 13, flows between the cover 37 and the driven end plate 41 and is drawn into the compression chamber 12 from the suction section 30a. Thus, the sliding parts between the driven scroll member 40 and the driven shaft 16, as well as the sliding parts between the driving scroll member 30 and the driven scroll member 40, can also be properly lubricated by the lubricating oil 18.

[0147] Furthermore, the compression chamber 12, through the driving rotation of the driven scroll 30 and the driven rotation of the driven scroll 40, seals the refrigerant inside itself, while simultaneously reducing its own volume and compressing the refrigerant. At this time, the compression chamber 12 is lubricated by the lubricating oil 18 drawn into it. Thus, the high-pressure refrigerant, compressed to the discharge pressure, is discharged from the discharge port 32 to the discharge chamber 14. Then, the high-pressure refrigerant discharged into the discharge chamber 14 is discharged to the outside of the compressor via the discharge passage 390 and the discharge connection port 83. Here, in this compressor, the discharge passage 390 and the discharge connection port 83 are sealed to the scroll chamber 65 by the shaft seal member 63, thus preventing the high-pressure refrigerant from the discharge passage 390 towards the discharge connection port 83 from flowing within the scroll chamber 65.

[0148] In this compressor, a stator 17 is fixed to a protrusion 64 located within the scroll chamber 65. Furthermore, in addition to the drive scroll member 30 being supported on the protrusion 64 in a manner rotatable about a drive axis O1, the driven scroll member 40 is also supported on the protrusion 64 in a manner rotatable about a driven axis O2. Thus, the protrusion 64 functions not only as a fixing member for the stator 17 but also as a supporting member for both the drive scroll member 30 and the driven scroll member 40. Furthermore, the protrusion 64 has a lubricating oil passage 7.

[0149] Furthermore, as described above, in this compressor, even when the driven scroll 30, driven scroll 40, and rotor 11 rotate within the scroll chamber 65, the lubricating oil 18, separated from the refrigerant and reaching the lower part of the scroll chamber 65, can be properly circulated into the lubricating oil passage 7 via the guide 71 and the inlet 72. Therefore, in this compressor, it is difficult for the amount of lubricating oil 18 stored in the oil reservoir 74 to be insufficient. As a result, in this compressor, lubricating oil 18 can be appropriately supplied to the sliding parts, including the first radial ball bearing 51, bushing 53, and sliding bearing 13, such as the driven scroll 30 and driven scroll 40, via the lubricating oil passage 7. Thus, in this compressor, the aforementioned sliding parts can be properly lubricated using the lubricating oil 18 supplied by the lubricating oil passage 7. In other words, in this compressor, the amount of lubricating oil 18 that remains in the lower part of the scroll chamber 65 due to not reaching the lubricating oil passage 7 and thus cannot be used for lubricating the driven scroll 30, etc., can be minimized.

[0150] Therefore, the compressor of Example 1 exhibits high durability.

[0151] In particular, in this compressor, the first guide path 71a and the second guide path 71b of the guide portion 71 are recessed into the front surface 611 of the cover body portion 61a. Therefore, by forming the guide portion 71 in the first outer cover 61, the guide portion 71 can be easily installed within the scroll chamber 65. Furthermore, in this compressor, the guide portion 71 is composed of the first guide path 71a and the second guide path 71b, thereby simplifying the shape of the guide portion 71 and allowing the lubricating oil 18 to be appropriately guided to the inlet 72 and subsequently to the lubricating oil passage 7 via the guide portion 71.

[0152] Furthermore, in this compressor, the second guide passage 71b is covered from the scroll chamber 65 side by a cover plate 75 installed on the front surface 611 of the cover body 61a. Therefore, in this compressor, lubricating oil 18 can be appropriately guided from the first guide passage 71a to the second guide passage 71b, and the lubricating oil 18 flowing toward the inlet 72 in the second guide passage 71b can be appropriately prevented from overflowing from the second guide passage 71b toward the rotational direction R1 of the drive scroll member 30 and the rotor 11. In other words, in this compressor, by covering the second guide passage 71b with the cover plate 75, the lubricating oil 18 is prevented from overflowing from the second guide passage 71b into the rotational direction R1 due to the propulsive force. Figure 4 The paper overflows to the right or during the flow of lubricating oil 18 from the second guide path 71b to the right. Figure 4 The paper overflows to the right. Thus, in this compressor, the lubricating oil 18 can be reliably guided to the inlet 72 via the second guide path 71b. At this point, the lubricating oil 18 can also be properly circulated into the lubricating oil passage 7 in this compressor.

[0153] Furthermore, in this compressor, an oil reservoir 74 constituting the lubricating oil passage 7 is formed inside the protrusion 64. Therefore, in this compressor, compared to the case where the oil reservoir 74 is separately formed in the protrusion 64 within the scroll chamber 65, a dedicated space for forming the oil reservoir 74 in the scroll chamber 65 is not required. Thus, in this compressor, the enlargement of the outer casing 6 during the formation of the oil reservoir 74 is also prevented.

[0154] (Example 2)

[0155] like Figure 6 As shown, in the compressor of Embodiment 2, the cover plate 75 is not installed on the front surface 611 of the cover body 61a. Therefore, in this compressor, the second bolt hole 614 is not formed in the cover body 61a. On the other hand, in this compressor, a protective protrusion 77 is provided in the cover body 61a. The protective protrusion 77 is an example of a "protective part" in this invention.

[0156] The protective protrusion 77 is integrally formed on the cover body 61a. The protective protrusion 77 is located in the cover body 61a on the outer side of the rotation direction R1 of the drive vortex member 30 and the rotor 11, which is closer to the first guide path 71a and the second guide path 71b, and is adjacent to the second guide path 71b.

[0157] The protective protrusion 77 protrudes in a generally rectangular shape from the front surface 611 toward the interior of the vortex chamber 65. Specifically, the protective protrusion 77 extends in a straight line from its lower end toward the upper part along the second guide path 71b and then curves toward the first guide path 71a. The other components in this compressor are the same as those in the compressor of Embodiment 1, and the same reference numerals are used to refer to the same components, and detailed descriptions related to the components are omitted.

[0158] In this compressor, the protective protrusion 77 protrudes from the front surface 611 toward the scroll chamber 65. Therefore, if lubricating oil 18 is being guided from the first guide path 71a to the second guide path 71b, or if lubricating oil 18 flowing in the second guide path 71b is about to overflow into the rotational direction R1 of the drive scroll member 30 and the rotor 11 due to the propulsive force in that direction, it will collide with the protective protrusion 77. This allows the lubricating oil 18 that has collided with the protective protrusion 77 to return to the second guide path 71b. Thus, in this compressor, it is also possible to appropriately prevent lubricating oil 18 flowing in the second guide path 71b from overflowing into the rotational direction R1 of the drive scroll member 30 and the rotor 11. As a result, in this compressor, the lubricating oil 18 can also be reliably guided to the inlet 72 via the second guide path 71b.

[0159] Furthermore, in this compressor, the protective protrusion 77 is integrally formed on the cover body 61a. Therefore, compared to the case where the protective protrusion 77 and the cover body 61a are separate parts, in addition to easily placing the protective protrusion 77 on the cover body 61a, the positioning of the first guide path 71a and the second guide path 71b with the protective protrusion 77 is not required. The other functions of this compressor are the same as those of the compressor in Embodiment 1.

[0160] 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.

[0161] For example, in the compressor of Embodiment 1, the first guide path 71a of the guide section 71 is shaped as follows: it extends in an arc shape along approximately half a circumference of the first outer casing 61 from a position below the protrusion 64 to a position above the flow inlet 72. That is, the first guide path 71a is shaped such that its lower end is located below the drive shaft O1 and the protrusion 64. However, it is not limited to this; the first guide path 71a can be formed in other shapes as long as it can guide the lubricating oil 18 in the vortex chamber 65 to a position above the flow inlet 72. The compressor of Embodiment 2 is similar.

[0162] Additionally, the first guiding path 71a can also be derived from... Figure 2The first straight line extends from the lower right side of the paper to the lower left side, connecting with the left end of the first straight line and... Figure 2 It consists of a second straight path extending in a straight line on the upper left side of the paper, and a third straight path that connects the upper end of the second straight path to the second guide path 71b in a straight line.

[0163] Alternatively, the beginning of the first guide path 71 may be located above the lubricating oil passage 7.

[0164] Furthermore, in the compressor of Embodiment 1, the lubricating oil passage 7 is composed of an oil reservoir 74 and an outlet 73. However, it is not limited to this; the lubricating oil passage 7 may also be recessed into the outer peripheral surface of the second diameter portion 64b of the protrusion 64. The compressor of Embodiment 2 is similarly provided.

[0165] In the compressor of Embodiment 1, the configuration is as follows: the second guide path 71b of the guide portion 71 is recessed into the front surface 611 of the cover body portion 61a, and the cover plate 75 is mounted on the front surface 611, thereby forming the second guide path 71b between the cover body portion 61a and the cover plate 75. However, it is not limited to this configuration; it is also possible to form the second guide path 71b between the cover body portion 61a and the cover plate 75 by mounting the cover plate 75 with the recessed second guide path 71b on the front surface 611. Alternatively, it is also possible to form the second guide path 71b between the cover body portion 61a and the cover plate 75 by recessing the second guide path 71b into both the front surface 611 and the cover plate 75.

[0166] Alternatively, in the compressor of Embodiment 1, the cover plate 75 may also be shaped to cover part of the entire first guide path 71a, in addition to the second guide path 71b. Alternatively, the cover plate 75 may be shaped to cover the entire first guide path 71a by providing an opening in the cover plate 75 that connects the first guide path 71a to the scroll chamber 65.

[0167] Furthermore, in the compressor of Embodiment 2, the protective protrusion 77 is formed in a shape that extends in a straight line from the lower end upward along the second guide path 71b and then bends towards the first guide path 71a. However, it is not limited to this, and the protective protrusion 77 may also be of other shapes as long as it can prevent the lubricating oil 18 flowing in the second guide path 71b from overflowing from the second guide path 71b into the rotational direction R1 of the drive scroll member 30 and the rotor 11.

[0168] Furthermore, in the compressor of Embodiment 2, the formation of the first guide path 71a and the second guide path 71b can be omitted, allowing the protective protrusion 77 to function as a "guide" in this invention. That is, in this case, by causing the lubricating oil 18 flowing through the front surface 611 of the cover body 61a through the propulsive force in the rotational direction R1 generated by the rotation of the drive scroll 30, the driven scroll 40, and the rotor 11 to collide with the protective protrusion 77, the lubricating oil 18 can be guided toward the inlet 72 and then toward the oil reservoir 74.

[0169] Alternatively, in the compressor of Embodiment 2, the formation of the first guide path 71a may be omitted, and the "guide section" of the present invention may be formed by the second guide path 71b and the protective protrusion 77.

[0170] Furthermore, in the compressor of Embodiment 1, the guide portion 71 is recessed in the front surface 611 of the cover body 61a, thereby providing the guide portion 71 within the vortex chamber 65. However, it is not limited to this; the guide portion 71 may also be recessed in the outer peripheral surface of the protrusion 64. The compressor of Embodiment 2 is similarly provided.

[0171] Furthermore, in the compressor of Embodiment 1, an inlet 72 is formed at the base end portion 615 of the retaining portion 61b. However, it is not limited to this; the inlet 72 may also be formed on both the second diameter portion 64b of the protrusion 64 and the top end portion 616 of the retaining portion 61b. Alternatively, the inlet 72 may be formed only on the second diameter portion 64b. The compressor of Embodiment 2 is similar.

[0172] Alternatively, in the compressor of Embodiment 1, the protrusion 64 may be integrally provided on the first outer casing 61. The same applies to the compressor of Embodiment 2.

[0173] Alternatively, in the compressor of Embodiment 1, the stator 17 can be fixed to the inner circumferential surface of the housing body 60, and the rotor 11 can be disposed inside the stator 17. The compressor of Embodiment 2 is similar.

[0174] Industrial availability

[0175] This invention can be used in vehicle air conditioning systems, etc.

Claims

1. A dual-rotary scroll compressor, the dual-rotary scroll compressor comprising a housing, a driving scroll component, a driven scroll component, a driving mechanism, and a driven mechanism. The housing has a vortex chamber that houses the driving vortex member, the driven vortex member, and the driving mechanism, and draws in fluid. The driving scroll component is driven to rotate around the driving shaft via the driving mechanism. The driven scroll member is eccentric relative to the driving scroll member and rotates passively about the 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 fluid through the driving rotation and the driven rotation. Its features are, The vortex chamber is provided with a protrusion that extends toward the driving vortex member and the driven vortex member along the direction of the driving axis. The drive scroll member is supported on the protrusion in a manner that allows it to rotate about the drive axis. The protrusion has a lubricating oil passage for supplying lubricating oil to the driving vortex component. A guide is provided in the vortex chamber, which guides the lubricating oil flowing in the vortex chamber through the propulsive force in the rotational direction generated by the rotation of the driving vortex member, the driven vortex member, and the driving mechanism to a position above the lubricating oil passage and towards the lubricating oil passage.

2. The dual rotary scroll compressor according to claim 1, characterized in that, The outer casing has a support wall that extends radially along the outer casing, faces the vortex chamber, and supports the protrusion. The guide portion is formed on the support wall.

3. The dual rotary scroll compressor according to claim 2, characterized in that, At least one of the support wall and the protrusion has a flow inlet, the flow inlet communicating with the lubricating oil passage and allowing the lubricating oil to flow into the lubricating oil passage. The guide portion has: The first guide path, located radially outward of the protrusion, causes the lubricating oil in the vortex chamber to flow upward through the lubricating oil passage by a thrust in the direction of rotation. as well as The second guide path, connected to the first guide path, guides the lubricating oil that has flowed through the first guide path from above the lubricating oil passage toward the inlet.

4. The dual rotary scroll compressor according to claim 3, characterized in that, A protective portion is provided on the support wall, which allows the lubricating oil that has flowed through the first guide path to flow into the second guide path and prevents the lubricating oil from overflowing from the second guide path.

5. The dual rotary scroll compressor according to claim 4, characterized in that, The protective element is integrally formed on the support wall.

6. The dual rotary scroll compressor according to any one of claims 2 to 4, characterized in that, The dual-rotary scroll compressor has a mounting body formed in the shape of a plate and mounted on the support wall and located within the scroll chamber. At least a portion of the guide portion is formed between the support wall and the mounting body.

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