Compressor

Abstract

To reduce the cost during machining or assembling.SOLUTION: A compressor includes: a housing 11 which serves as an outer shell; a scroll compression mechanism 10 which has a turning scroll 13 performing turning motion, and a fixed scroll 12 having an end plate 12a and a wall body 12b vertically provided on one surface of the end plate 12a and fixed to the housing 11, and which is provided inside the housing 11 and compresses a refrigerant containing lubricating oil; a lid 11b of the housing 11 which comes into surface contact with the other surface 12aa of the end plate 12a; an oil separator 29 for separating the lubricating oil from the refrigerant compressed by the scroll compression mechanism 10; and an oil storage chamber 24 for storing the lubricating oil separated by the oil separator 29. A lubricating oil groove in which the lubricating oil delivered from the oil storage chamber 24 flows is formed on the other surface 12aa of the end plate 12a.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a compressor. [Background technology]

[0002] BACKGROUND ART A known compressor provided in an air conditioner or the like is equipped with an oil separator that separates a refrigerant from a lubricating oil contained in the refrigerant (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-240676 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, compressors equipped with an oil separator temporarily store separated lubricating oil in an oil reservoir located in a high-pressure region. In such compressors, when the lubricating oil stored in the oil reservoir located in the high-pressure region is guided to a relatively low-pressure region, a pressure reduction mechanism is used to reduce the pressure of the lubricating oil. Examples of pressure reduction mechanisms include thin spiral grooves formed in pins and thin grooves formed in gaskets, etc. However, forming spiral grooves in pins can be difficult and can complicate the manufacturing process. Furthermore, forming grooves in gaskets can be difficult and can complicate the assembly process because it is necessary to check for gasket deformation during assembly. This can potentially increase manufacturing and assembly costs.

[0005] Furthermore, when grooves are formed as a pressure reducing mechanism on the peripheral surface of the end plate of the fixed scroll, as in the compressor described in Patent Document 1, holes or grooves must be added in the axial direction to guide oil to the grooves, which can complicate the machining process. Furthermore, when adding holes in the axial direction, the grooves on the peripheral surface must be machined deeper to connect the holes to the grooves on the peripheral surface. This can lead to increased machining costs.

[0006] The present disclosure has been made in view of the above circumstances, and has an object to provide a compressor that can reduce costs during processing and assembly. [Means for solving the problem]

[0007] In order to solve the above problems, the compressor of the present disclosure employs the following measures. A compressor according to one aspect of the present disclosure has a housing forming an outer shell, a revolving scroll, an end plate and a fixed scroll having a wall erected on one surface of the end plate and fixed to the housing, and is equipped with a scroll compression mechanism provided inside the housing and compressing a refrigerant containing lubricating oil, a contact portion in surface contact with the other surface of the end plate, a separation portion that separates the lubricating oil from the refrigerant compressed by the scroll compression mechanism, and a storage portion that stores the lubricating oil separated by the separation portion, and an oil groove formed on the other surface of the end plate through which the lubricating oil discharged from the storage portion flows. [Effects of the Invention]

[0008] According to the present disclosure, costs during processing and assembly can be reduced. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a vertical cross-sectional view showing a main portion of a scroll compressor according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is an exploded view of the scroll compressor shown in FIG. [Figure 3] FIG. 3 is a view taken in the direction of the arrow A in FIG. 2. [Figure 4] FIG. 3 is a view taken in the direction of the arrow B in FIG. 2. [Figure 5] FIG. 2 is a cross-sectional view of an oil groove formed in the scroll compressor according to the first embodiment of the present disclosure. [Figure 6] FIG. 6 is a diagram showing an oil groove according to a modified example of the first embodiment of the present disclosure. [Figure 7] FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. 6. [Figure 8] FIG. 6 is a diagram showing an oil groove according to a modified example of the first embodiment of the present disclosure. [Figure 9] FIG. 10 is a view of a cover portion of a scroll compressor according to a second embodiment of the present disclosure, viewed from the main body side. [Figure 10] FIG. 10 is a view showing an oil groove and a positioning pin of a scroll compressor according to a second embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of a compressor according to the present disclosure will be described with reference to the drawings.

[0011] [First embodiment] A first embodiment of the present disclosure will be described below with reference to FIGS. The compressor according to this embodiment is a scroll compressor, and is applied to, for example, an air conditioner.

[0012] As shown in Figures 1 and 2, the scroll compressor (compressor) 1 includes a housing (casing) 11 that forms an outer shell. The housing 11 is filled with a refrigerant containing mist-like lubricating oil. The housing 11 includes a cylindrical main body 11a and a lid 11b that closes an opening on one end side of the main body 11a. The main body 11a and the lid 11b are fixed with bolts or the like. The lid 11b has an outer periphery that comes into surface contact with an end plate 12a of the fixed scroll 12, which will be described later, and a central portion that is recessed from the outer periphery and in which a discharge cavity 23, which will be described later, and the like, is formed. In the scroll compressor 1 of this embodiment, no gasket or the like is provided between the cover portion 11b and the fixed scroll 12. That is, the fixed scroll 12 and the surface of the outer periphery of the cover portion 11b facing the fixed scroll 12 (hereinafter referred to as the "contact surface 11ba") are in direct contact with each other. In addition, a gasket (not shown) is provided between the body portion 11a and the cover portion 11b. That is, the gasket is sandwiched between the cover portion 11b and the body portion 11a.

[0013] A scroll compression mechanism 10 having a fixed scroll 12 and an orbiting scroll 13 is provided inside the housing 11. The scroll compression mechanism 10 compresses the refrigerant. The fixed scroll 12 is made of, for example, a metal material. The fixed scroll 12 has a disk-shaped end plate 12a and a spiral-shaped wall body 12b standing on one side of the end plate 12a. The fixed scroll 12 is fixed by being sandwiched between the main body portion 11a and the cover portion 11b of the housing 11. The orbiting scroll 13 is made of, for example, a metal material. Like the fixed scroll 12, the orbiting scroll 13 has a disk-shaped end plate 13a and a spiral-shaped wall body 13b standing on one side of the end plate 13a. The orbiting scroll 13 is eccentric to the fixed scroll 12 by the orbital radius and is shifted in phase by 180°. The fixed scroll 12 and the orbiting scroll 13 are arranged so that the wall bodies 12b, 13b mesh with each other. A compression chamber is formed between the wall bodies 12b, 13b. The other surface of the end plate 12a of the fixed scroll 12 (hereinafter referred to as "other surface 12aa") is in surface contact with the outer periphery of the cover portion 11b.

[0014] The scroll compressor 1 also includes a main shaft (not shown) having a crankshaft at the end on the orbiting scroll 13 side. The main shaft is rotatably supported by a plurality of bearings in the housing 11. A motor is connected to one longitudinal end of the main shaft, and the main shaft is rotated by the driving force of the motor. An orbiting scroll 13 is fixed to the other longitudinal end of the main shaft. More specifically, a boss portion (not shown) is provided at the center of the other end surface of the end plate 13a of the orbiting scroll 13, and an eccentric portion of the crankshaft is rotatably accommodated in this boss portion via a bearing (not shown) and a drive bush (not shown). As a result, the orbiting scroll 13 performs an orbital motion when the main shaft is rotated. A balance weight (not shown) is attached to the drive bush.

[0015] A discharge port 21 that discharges high-pressure refrigerant from the compression chamber is provided in the center of the end plate 12a of the fixed scroll 12. A discharge cavity 23 is formed between the cover portion 11b of the housing 11 and the other surface 12aa of the end plate 12a of the fixed scroll 12. The discharge cavity 23 is defined by a recess provided in the cover portion 11b and the other surface 12aa of the end plate 12a.

[0016] The scroll compressor 1 rotates the main shaft to cause the orbiting scroll 13 to revolve. As a result, the volume of the compression chamber gradually decreases as it approaches the center, and the refrigerant that has flowed into the compression chamber moves to the center, is compressed, and is discharged to the discharge cavity 23 through the discharge port 21.

[0017] As shown in FIGS. 1 to 3, the scroll compressor 1 includes an oil separator (separation unit) into which the refrigerant is guided from the discharge cavity 23. The oil separator 29 is a long, cylindrical body. The oil separator 29 is housed inside the cover portion 11b. The refrigerant guided into the oil separator 29 forms a swirling flow, and the lubricating oil is separated by centrifugal separation. In this manner, the oil separator 29 separates the lubricating oil from the refrigerant guided from the discharge cavity 23. The lubricating oil separated by the oil separator 29 is guided to the oil reservoir (reservoir) 24 via a lubricating oil flow path 25 connected to the lower end of the oil separator 29. A filter 26 is provided midway along the lubricating oil flow path 25. The filter 26 collects impurities such as dust contained in the lubricating oil.

[0018] An oil reservoir chamber (reservoir) 24 is provided below the discharge cavity 23 to temporarily store the lubricating oil separated by the oil separator 29. The oil reservoir chamber 24 is defined by a recess provided in the lid portion 11b and the other surface 12aa of the end plate 12a. The lubricating oil stored in the oil reservoir 24 is guided via a high-pressure oil return passage (inlet passage) 27 provided in the lid portion 11b to a lubricating oil groove (oil groove) 30 (see FIG. 4) formed on the other surface 12aa of the end plate 12a (described later). The high-pressure oil return passage 27 has an inclined portion 27a extending diagonally downward and a horizontal portion 27b that bends from the inclined portion 27a and extends substantially horizontally. The high-pressure oil return passage 27 is bent so that the angle formed by the inclined portion 27a and the horizontal portion 27b is an acute angle.

[0019] The lubricating oil that flows through the lubricating oil groove 30 is guided to a low-pressure oil return passage (outlet passage) 32 formed inside the outermost wall body 12b of the fixed scroll 12. The lubricating oil that flows through the low-pressure oil return passage 32 is returned to the space on the orbiting scroll 13 side and is used to lubricate drive mechanisms such as various bearings and drive bushings. An O-ring groove 34 is formed on the other surface 12aa of the end plate 12a of the fixed scroll 12. An O-ring 35 is housed in the O-ring groove 34. The O-ring 35 seals the high-pressure refrigerant in the discharge cavity 23 so that the high-pressure refrigerant does not move toward the low-pressure oil return passage 32.

[0020] Next, the lubricating oil groove 30 formed on the other surface 12aa of the end plate 12a of the fixed scroll 12 will be described in detail with reference to FIGS. As shown in FIG. 4, the lubricating oil groove 30 is formed in the other surface 12aa of the end plate 12a of the fixed scroll 12. Specifically, the lubricating oil groove 30 is formed in the outer periphery of the other surface 12aa. The lubricating oil groove 30 extends around the entire periphery of the end plate 12a. That is, the lubricating oil groove 30 has an annular shape when the other surface 12aa of the end plate 12a is viewed in plan. The lubricating oil groove 30 is located radially outward of the O-ring groove 34. The width (radial length) of the lubricating oil groove 30 is shorter than the width of the O-ring groove 34. The other surface 12aa is in surface contact with the contact surface 11ba of the lid portion 11b. Therefore, the upper part of the lubricating oil groove 30 is closed by the lid portion 11b. That is, the lubricating oil groove 30 and the lid portion 11b define a flow path through which the lubricating oil flows.

[0021] The lower end of the lubricating oil groove 30 is connected to the downstream end 27c of the high-pressure oil return channel 27. The upper end of the lubricating oil groove 30 is connected to the upstream end 32a of the low-pressure oil return channel 32. If the radial positions of the lubricating oil groove 30 and the downstream end 27c of the high-pressure oil return channel 27 and / or the upstream end 32a of the low-pressure oil return channel 32 do not coincide, a connection portion may be formed connecting the lubricating oil groove 30 to the downstream end 27c of the high-pressure oil return channel 27 and / or the upstream end 32a of the low-pressure oil return channel 32. The connection portion may be, for example, a counterbore portion (a circular recess in a plan view) formed on the other surface 12aa of the end plate 12a. By forming the connection portion as a counterbore portion, the connection portion (counterbore portion) can also be formed using a device for forming a reference hole when machining a reference hole or the like on the other surface 12aa of the end plate 12a. This facilitates the formation of the connection portion. In this embodiment, the downstream end 27c of the high-pressure-side oil return channel 27 and the upstream end 32a of the low-pressure-side oil return channel 32 are located radially outward of the lubricating oil groove 30. Therefore, an upstream countersunk portion 30a is provided connecting the lubricating oil groove 30 to the downstream end 27c of the high-pressure-side oil return channel 27, and a downstream countersunk portion 30b is provided connecting the lubricating oil groove 30 to the upstream end 32a of the low-pressure-side oil return channel 32. By providing the countersunk portion (connecting portion) in this manner, it is not necessary to match the radial positions of the lubricating oil groove 30 with the downstream end 27c of the high-pressure-side oil return channel 27 and / or the upstream end 32a of the low-pressure-side oil return channel 32. This improves the degree of freedom in the layout of the downstream end 27c of the high-pressure-side oil return channel 27 and / or the upstream end 32a of the low-pressure-side oil return channel 32.

[0022] 5, the longitudinal cross section (flow path cross section) of the lubricating oil groove 30 is substantially triangular. Specifically, the apex of the triangle, which forms the bottom surface of the lubricating oil groove 30, is curved. The radius of curvature R of this curved apex is 0.4 mm or more.

[0023] The lubricating oil groove 30 is formed by lathe machining at the same time as the O-ring groove 34 and the like are formed on the other surface 12aa of the end plate 12a by lathe machining.

[0024] Next, a part of the flow of the refrigerant and lubricating oil in the scroll compressor 1 according to this embodiment will be described. When the scroll compressor 1 is in operation, high-pressure refrigerant is discharged from the discharge port 21 into the discharge cavity 23. The refrigerant discharged into the discharge cavity 23 contains mist-like lubricating oil. The refrigerant discharged into the discharge cavity 23 is guided to the oil separator 29 via the refrigerant flow path 22. The refrigerant flow path 22 is configured to create a swirling flow of the refrigerant, so the refrigerant introduced into the oil separator 29 swirls within the oil separator 29. This causes the lubricating oil to be separated from the refrigerant by centrifugal separation within the oil separator 29. The separated lubricating oil is guided to the oil reservoir 24 via the lubricating oil flow path 25. At this time, impurities are removed by the filter 26. The lubricating oil in the oil reservoir 24 flows into the lubricating oil groove 30 via the high-pressure oil return flow path 27 due to the pressure difference between the discharge cavity 23 (specifically, the oil reservoir 24) and the low-pressure oil return flow path 32. The lubricating oil that has flowed into the lubricating oil groove 30 flows within the lubricating oil groove 30 (see the arrows in Figure 4). At this time, the lubricating oil is decompressed. The lubricating oil that has been discharged from the lubricating oil groove 30 flows into the low-pressure oil return channel 32. The lubricating oil that has flowed through the low-pressure oil return channel 32 is discharged from the downstream end. The lubricating oil that has been discharged from the low-pressure oil return channel 32 falls downward due to gravity and lubricates the bearings, drive bushings, and other components that are located below. In Figure 4, for convenience of illustration, only one direction (counterclockwise direction in Figure 4) of the flow direction of the lubricating oil in the lubricating oil groove 30 is shown with an arrow, and the arrow in the other direction (clockwise direction in Figure 4) is omitted, but the lubricating oil flows in both one direction and the other direction in the lubricating oil groove 30.

[0025] According to this embodiment, the following advantageous effects are achieved. In this embodiment, the other surface 12aa of the end plate 12a is formed with a lubricant groove 30 that guides lubricant from the oil reservoir chamber 24. The other surface 12aa of the end plate 12a is flat and has a relatively large area. This makes it easy to machine the lubricant groove 30. This simplifies the machining process of the lubricant groove 30. Furthermore, because the fixed scroll 12 is made of a material with relatively high rigidity, it is unlikely to deform even when the lubricating oil grooves 30 are formed. Therefore, even when the lubricating oil grooves 30 are formed, there is no need to check the fixed scroll 12 for deformation. This makes it possible to omit the step of checking the members in which the lubricating oil grooves 30 are formed during assembly of the scroll compressor 1. This therefore simplifies the assembly process of the scroll compressor 1. As a result, the processing and assembly steps can be simplified, and the costs involved in processing and assembly can be reduced.

[0026] In this embodiment, the lubricant oil groove 30 is formed in an annular shape. This allows the lubricant oil groove 30 to be formed by lathe processing. Therefore, the lubricant oil groove 30 can be easily formed. Furthermore, when grooves other than the lubricant oil groove 30 (e.g., O-ring groove 34) are formed on the other surface 12aa of the end plate 12a by lathe processing, the lubricant oil groove 30 can also be formed during the lathe processing for forming the other grooves. Therefore, the lubricant oil groove 30 can be formed more easily than when the other grooves and the lubricant oil groove 30 are processed in separate processes.

[0027] In this embodiment, an O-ring groove 34 in which an O-ring 35 is provided is formed radially inside the lubricating oil groove 30. This makes it possible to suppress leakage of the refrigerant.

[0028] In this embodiment, the cross section of the lubricant oil groove 30 is substantially triangular. This makes it possible to easily form the lubricant oil groove 30, for example, when forming the lubricant oil groove 30 by lathe processing. This reduces the processing cost.

[0029] [Variation 1] Next, a modification of this embodiment will be described with reference to Figures 6 and 7. This modification differs from the first embodiment in that a positioning pin is provided inside the lubricating oil groove 30. Since the other points are the same, the same components are denoted by the same reference numerals and detailed description thereof will be omitted.

[0030] 6 and 7, a positioning pin (flow path cross-section reduction portion) 40 is provided inside the lubricating oil groove 30 according to this modification. The positioning pin 40 is a pin for determining the positions of the fixed scroll 12 and the housing 11. As shown in Fig. 6, two positioning pins 40 are provided, and the two positioning pins 40 are arranged at 180-degree intervals in the circumferential direction. As shown in Fig. 7, the end of the positioning pin 40 on the lid portion 11b side is inserted into a pin hole formed in the contact surface 11ba of the lid portion 11b. In addition, the end of the positioning pin 40 on the end plate 12a side is inserted into a pin hole formed in the bottom surface of the lubricating oil groove 30. As shown in Fig. 7, the cross-sectional area of ​​the flow path of the lubricating oil groove 30 is reduced in the portion where the positioning pin 40 is provided.

[0031] This modification provides the following advantageous effects. In this modification, a positioning pin 40 that reduces the cross-sectional area of ​​the flow passage is provided inside the lubricating oil groove 30. This makes it possible to adjust the cross-sectional area of ​​the flow passage of the lubricating oil groove 30 by adjusting the size of the positioning pin 40, etc. Therefore, it is possible to adjust the amount of pressure reduction of the lubricating oil flowing through the lubricating oil groove 30. Furthermore, in order to reduce the cross-sectional area of ​​the flow passage, a positioning pin 40 is used to determine the position of the fixed scroll 12 and the housing 11. This eliminates the need to provide a new component to reduce the cross-sectional area of ​​the flow passage, thereby reducing the number of components. This simplifies the assembly process and reduces costs.

[0032] [Variation 3] Next, a modification of this embodiment will be described with reference to Fig. 8. This modification differs from the first embodiment in that the lubricating oil groove has a plurality of annular grooves and connecting portions. Since the other points are the same, the same components are assigned the same reference numerals and detailed descriptions thereof will be omitted. 8, the lubricating oil groove 60 according to this modification has a first annular groove 61 connected to the downstream end 27c of the high-pressure oil return passage 27 that guides the lubricating oil to the lubricating oil groove 60, a second annular groove 62 that is provided concentrically with the first annular groove 61 and connects to the upstream end 32a of the low-pressure oil return passage 32 through which the lubricating oil is discharged from the lubricating oil groove 60, and a counterbore portion (connecting portion) 63 that connects the first annular groove 61 and the second annular groove 62. The second annular groove 62 is provided radially outward of the first annular groove 61.

[0033] 8, the lubricating oil that flows into the first annular groove 61 from the downstream end 27c of the high-pressure-side oil return channel 27 flows into the second annular groove 62 via the countersunk portion 63. The lubricating oil that flows into the second annular groove 62 flows into the low-pressure-side oil return channel 32 from the upstream end 32a of the low-pressure-side oil return channel 32. In Figure 8, for convenience of illustration, only one direction (counterclockwise direction in Figure 8) of the flow direction of the lubricating oil in the lubricating oil groove 60 is shown with an arrow, and the arrow in the other direction (clockwise direction in Figure 8) is omitted, but the lubricating oil flows in both one direction and the other direction in the lubricating oil groove 60.

[0034] This modification provides the following advantageous effects. In this modified example, even if the downstream end 27c of the high-pressure-side oil return channel 27 and the upstream end 32a of the low-pressure-side oil return channel 32 are positioned differently in the radial direction, lubricating oil can be guided from the high-pressure-side oil return channel 27 to the low-pressure-side oil return channel 32 via the lubricating oil groove 60. This eliminates the need to match the radial positions of the downstream end 27c of the high-pressure-side oil return channel 27 and the upstream end 32a of the low-pressure-side oil return channel 32. This improves the degree of freedom in the layout of the downstream end 27c of the high-pressure-side oil return channel 27 and the upstream end 32a of the low-pressure-side oil return channel 32. Furthermore, since the first annular groove 61 and the second annular groove 62 are both annular, they can be formed by lathe machining, which makes machining easier. Furthermore, by forming the connection portion connecting the first annular groove 61 and the second annular groove 62 as a counterbore portion as in this modified example, the connection portion (counterbore portion 63) can also be formed using a device for forming a reference hole when machining a reference hole or the like in the other surface 12aa of the end plate 12a. Therefore, the connection portion (counterbore portion 63) can be easily formed.

[0035] Although the present modified example has been described with respect to an example in which there are two annular grooves, there may be three or more annular grooves. In this case, a counterbore portion may be provided that connects all of the annular grooves, or multiple counterbore portions may be provided that connect only adjacent annular grooves in the radial direction (for example, in the case of three annular grooves, two counterbore portions may be provided: one that connects the outermost annular groove with the central annular groove, and another that connects the innermost annular groove with the central annular groove).

[0036] [Second embodiment] Next, a second embodiment of the present disclosure will be described with reference to FIGS. The scroll compressor 1 of the present disclosure differs from the first embodiment in that a gasket 9 is provided between the end plate 12a of the fixed scroll 12 and the lid portion 11b of the housing 11. Since the other points are the same as those of the first embodiment, the same components are denoted by the same reference numerals and detailed description thereof will be omitted.

[0037] In the scroll compressor 1 according to this embodiment, a gasket 9 is provided between the body portion 11a and the cover portion 11b, and between the cover portion 11b and the fixed scroll 12. That is, the gasket 9 is sandwiched between the cover portion 11b and the body portion 11a and the fixed scroll 12. 9, the gasket 9 is formed in a substantially annular shape in a plan view. The gasket 9 has a plurality of protrusions 9a that protrude radially outward from the outer periphery. The gasket 9 is in surface contact with the contact surface 11ba of the cover portion 11b.

[0038] The other surface 12aa of the end plate 12a of the fixed scroll 12 is in surface contact with the gasket 9. The other surface 12aa and the outer periphery of the cover portion 11b sandwich the gasket 9 therebetween.

[0039] As described above, the other surface 12aa of the end plate 12a is in surface contact with the gasket 9. Therefore, the upper part of the lubricating oil groove 30 is closed by the gasket 9. In other words, the lubricating oil groove 30 and the gasket 9 define a flow path through which the lubricating oil flows.

[0040] [Variation 4] Next, a modification of this embodiment will be described with reference to Figure 10. This modification differs from the second embodiment in that a positioning pin is provided inside the lubricating oil groove 30. Since the other points are the same, the same components are assigned the same reference numerals and detailed description thereof will be omitted.

[0041] As described in the first modification of the first embodiment, the scroll compressor 1 according to this embodiment may also have a positioning pin 40 provided inside the lubricating oil groove 30. In this embodiment, the positioning pin 40 penetrates the gasket 9. The tip of the positioning pin 40 is inserted into a pin hole formed in the bottom surface of the lubricating oil groove 30. As shown in FIG. 10 , the cross-sectional area of ​​the flow passage of the lubricating oil groove 30 is reduced in the portion where the positioning pin 40 is provided.

[0042] This modification also provides the same effects as the first modification of the first embodiment.

[0043] The present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present disclosure.

[0044] The compressor according to the above-described embodiment can be understood, for example, as follows. A compressor according to one embodiment of the present disclosure includes a housing (11) forming an outer shell, an orbiting scroll (13) that orbits, and a fixed scroll (12) that has an end plate (12a) and a wall (12b) standing on one surface of the end plate and is fixed to the housing. The compressor is also provided with a scroll compression mechanism (10) that is provided inside the housing and compresses a refrigerant containing lubricating oil, contact portions (9, 11b) that are in surface contact with the other surface (12aa) of the end plate, a separation portion (29) that separates the lubricating oil from the refrigerant compressed by the scroll compression mechanism, and a storage portion (24) that stores the lubricating oil separated in the separation portion. An oil groove (30) is formed on the other surface of the end plate through which the lubricating oil discharged from the storage portion flows.

[0045] In the above configuration, an oil groove is formed on the other surface of the end plate to guide the lubricating oil from the reservoir. The other surface of the end plate is flat and has a relatively large area. This makes it easy to machine the oil groove. This simplifies the machining process of the oil groove. Furthermore, because the fixed scroll is made of a relatively rigid material, it is unlikely to deform even when oil grooves are formed. Therefore, there is no need to check for deformation of the fixed scroll even when oil grooves are formed. This eliminates the need to check the components with oil grooves during compressor assembly. This simplifies the compressor assembly process. As a result, the processing and assembly steps can be simplified, and the costs involved in processing and assembly can be reduced.

[0046] In addition, in a compressor according to one aspect of the present disclosure, the oil groove extends along the outer peripheral edge of the end plate and has a circular ring shape when the other surface of the end plate is viewed in a plan view.

[0047] In the above configuration, the oil groove is formed in an annular shape. This allows the oil groove to be formed by lathe processing. Therefore, the oil groove can be formed easily. Furthermore, when a groove other than the oil groove (e.g., an O-ring groove) is formed on the other surface of the end plate by lathe processing, the oil groove can also be formed during the lathe processing for forming the other groove. Therefore, the oil groove can be formed more easily than when the other groove and the oil groove are processed in separate processes.

[0048] In the compressor according to the aspect of the present disclosure, an O-ring groove (34) in which an O-ring (35) is provided is formed radially inside the oil groove.

[0049] In the above configuration, an O-ring groove for receiving an O-ring is formed radially inside the oil groove, thereby making it possible to suppress leakage of the refrigerant.

[0050] In addition, in a compressor according to one embodiment of the present disclosure, the oil groove has a first annular groove (61) connected to an inlet flow path (27) that guides the lubricating oil to the oil groove, a second annular groove (62) that is concentric with the first annular groove and connects to an outlet flow path (32) through which the lubricating oil is discharged from the oil groove, and a connecting portion (63) that connects the first annular groove and the second annular groove.

[0051] In the above configuration, even if the downstream end of the inlet passage and the upstream end of the outlet passage are located at different radial positions, the lubricating oil can be guided from the inlet passage to the outlet passage via the oil groove. This eliminates the need to match the radial positions of the downstream end of the inlet passage and the upstream end of the outlet passage. This improves the degree of freedom in the layout of the downstream end of the inlet passage and the upstream end of the outlet passage. Furthermore, since the first annular groove and the second annular groove are both annular, they can be formed by lathe machining, which makes machining easier.

[0052] In the compressor according to an aspect of the present disclosure, a flow passage cross-section reducing portion (40) that reduces the flow passage cross-section is provided inside the oil groove.

[0053] In the above configuration, a flow passage cross-section reducing portion that reduces the flow passage cross-section is provided inside the oil groove. This allows the flow passage cross-section area of ​​the oil groove to be adjusted by adjusting the size of the flow passage cross-section reducing portion. Therefore, the amount of pressure reduction of the lubricating oil flowing through the oil groove can be adjusted. The flow path cross-section reducing portion may be, for example, a positioning pin or a gasket.

[0054] In the compressor according to one aspect of the present disclosure, the oil groove has a triangular cross section when cut along a plane intersecting the extending direction.

[0055] In the above configuration, the oil groove has a triangular cross section, which makes it easy to form the oil groove by lathe machining, for example, and therefore reduces machining costs. [Explanation of symbols]

[0056] 1: Scroll compressor 9: Gasket 9a:Protrusion 10:Scroll compression mechanism 11: Housing 11a: Main body 11b: Lid part 11ba: Contact surface 12: Fixed scrolling 12a: End plate 12aa: Other side 12b: Wall 13: Rotating scroll 13a: End plate 13b: Wall 21: Discharge port 22: Coolant flow path 23: Discharge cavity 24: Oil storage chamber (storage section) 25: Lubricating oil flow path 26: Filter 27: High-pressure oil return passage (inlet passage) 27a: Inclined part 27b:Horizontal part 27c: downstream end 29: Oil separator 30: Lubricating oil groove (oil groove) 30a: Upstream counterbore 30b: Downstream counterbore 32: Low pressure oil return passage (outlet passage) 32a: Upstream end 34: O-ring groove 35: O-ring 40: Positioning pin (reduced flow section) 60: Lubricating oil groove 61: First annular groove 62: Second annular groove 63: Counterbore (connection)

Claims

1. a housing forming an outer shell; a scroll compression mechanism provided inside the housing, the scroll compression mechanism including: an orbiting scroll that orbits; and a fixed scroll that has an end plate and a wall body erected on one surface of the end plate and is fixed to the housing, the scroll compression mechanism compressing a refrigerant containing lubricating oil; a contact portion that comes into surface contact with the other surface of the end plate; a separation unit that separates the lubricating oil from the refrigerant compressed by the scroll compression mechanism; a storage section that stores the lubricating oil separated by the separation section, The compressor further comprises an oil groove formed on the other surface of the end plate, through which the lubricating oil discharged from the reservoir flows.

2. The compressor according to claim 1 , wherein the oil groove extends along an outer peripheral edge of the end plate and has an annular shape when the other surface of the end plate is viewed in plan.

3. 3. The compressor according to claim 2, wherein an O-ring groove for receiving an O-ring is formed radially inside the oil groove.

4. 4. The compressor according to claim 1, wherein the oil groove comprises: a first annular groove connected to an inlet flow passage that guides the lubricating oil into the oil groove; a second annular groove that is concentric with the first annular groove and connects to an outlet flow passage through which the lubricating oil is discharged from the oil groove; and a connecting portion that connects the first annular groove and the second annular groove.

5. 5. The compressor according to claim 1, wherein a flow passage cross-section reducing portion that reduces a flow passage cross-section is provided inside the oil groove.

6. 6. The compressor according to claim 1, wherein the oil groove has a triangular cross section when cut along a plane intersecting the extending direction.

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