compressor

Abstract

The present invention improves the oil separation performance. The oil separation structure (55) includes a spacing member (62) that partitions the separation chamber (42) in the up and down directions. The spacing member (62) includes a support portion (71) and a rotation promotion portion. The support portion (71) is supported by the inner circumference (63) of the separation chamber (42) and is cylindrical. The upper end side of the rotation promotion portion is continuously formed with the support portion (71) and has a smaller diameter than the support portion (71). The lower end side is closed and is cylindrical. The rotation promotion portion is formed with a connecting path (75) that connects the radial inner side and the outer side, thereby promoting the rotation of the refrigerant that descends while rotating along the inner circumference (63) of the separation chamber (42).

Description

Technical Field

[0001] The present invention relates to a compressor. Background Art

[0002] Patent document 1 discloses a structure for centrifugally separating oil from refrigerant, wherein a partition plate for suppressing the oil from bouncing is provided above the oil storage area in the container. A cutout portion connected in the vertical direction is formed on the periphery of the partition plate, and the oil flows to the oil storage area through the cutout portion.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2015-215148.

[0004] Even if a partition plate is provided as in the background art, in a structure where only a simple cutout is formed to communicate in the vertical direction, it is considered that not only oil but also refrigerant will still pass through. If the refrigerant passes through the partition plate, the oil storage area below the partition plate will be lifted up, and there is a possibility that the oil separation performance will be reduced. Therefore, there is room for improvement in the oil separation performance. Summary of the invention

[0005] An object of the present invention is to improve the oil separation performance.

[0006] A compressor according to one embodiment of the present invention is a compressor that compresses a heat medium including oil, and is provided with an oil separation structure that separates the compressed heat medium and oil. The oil separation structure includes a separation chamber and a spacing component. The separation chamber is a cylindrical internal space with a central axis as the up-down direction. Heat medium and oil flow into and rotate circumferentially along the inner circumferential surface to separate the heat medium and oil. The spacing component partitions the separation chamber in the up-down direction. The spacing component has a supporting portion and a rotation promoting portion. The supporting portion is supported by the inner circumferential surface of the separation chamber and is cylindrical. The upper end side of the rotation promoting portion is formed continuously with the supporting portion and has a smaller diameter than the supporting portion. The lower end side is closed and is cylindrical. The rotation promoting portion is formed with a connecting path that connects the radial inner and outer sides to promote the rotation of the heat medium that rotates along the inner circumferential surface of the separation chamber and descends at the same time.

[0007] Effects of the Invention

[0008] According to the present invention, a connecting passage that connects the inner and outer sides in the radial direction is formed at the spacing member, so that it is difficult for the heat medium to pass through compared with a simple structure that connects in the up and down directions. In addition, the rotation promotion portion of the spacing member is smaller than the diameter of the support portion, so the rotation of the heat medium that rotates along the inner circumferential surface of the separation chamber and descends is promoted. That is, the rotation speed of the heat medium increases, and the streamlines in the rotation direction become stronger, so it becomes difficult for the gas phase heat medium to pass through the connecting passage, and the liquid phase oil is discharged without obstruction through the connecting passage. Therefore, the heat medium is inhibited from passing to the lower side of the spacing member, and the oil in the oil storage area can be prevented from being lifted up as much as possible, thereby improving the oil separation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a cross-sectional view along the front-rear direction and the up-down direction of the compressor.

[0010] Figure 2 is an enlarged cross-sectional view of the separation chamber.

[0011] Figure 3 It is a figure which shows a spacer member.

[0012] Figure 4 It is a diagram showing a modified example of the spacer member (through direction).

[0013] Figure 5 It is a diagram showing a modified example of the spacer member (cone).

[0014] Figure 6 It is an enlarged cross-sectional view of the separation chamber of the second embodiment.

[0015] Figure 7 It is a diagram showing a spacer member according to a second embodiment.

[0016] Figure 8 It is a figure which shows the modification of a spacer member (long hole). DETAILED DESCRIPTION

[0017] The following is an explanation of the embodiments of the present invention based on the accompanying drawings. In addition, each of the accompanying drawings is a schematic diagram and may be different from the actual situation. In addition, the following embodiments illustrate the device and method for implementing the technical idea of ​​the present invention, and do not specify the structure to the following content. That is, the technical idea of ​​the present invention can be variously modified within the technical scope described in the claims.

[0018] <<First Implementation Method>>

[0019] "structure"

[0020] Figure 1 1 is a cross-sectional view along the front-to-back direction and the up-down direction of the compressor. The compressor 11 is an electric scroll compressor used in the refrigerant circuit of, for example, an automobile air conditioner, which sucks in a refrigerant (heat medium), compresses it, and then discharges it. In the following description, for convenience, one side of the axial direction of the compressor 11 is set as the front side, and the other side of the axial direction is set as the rear side.

[0021] The compressor 11 is integrated in a manner that maintains airtightness by means of a front shell 12, a middle shell 13, and a rear shell 14 that are arranged in order from the front side in the axial direction. A suction port (not shown) for sucking in refrigerant is formed at the front shell 12, and a discharge port 16 for discharging the compressed refrigerant is formed at the rear shell 14. The front shell 12 has a suction chamber 21 connected to the suction port, and the suction chamber 21 accommodates an electric motor 22. The front side of the rotating shaft 23 of the electric motor 22 is rotatably supported by the front shell 12, and the rear side is rotatably supported by the middle shell 13.

[0022] The middle casing 13 accommodates a fixed scroll 24 and a movable scroll 25. The disc-shaped fixed scroll 24 is fixed in a manner that closes the rear side of the middle casing 13, and a spiral fixed side overlap 26 is formed on the front surface. The disc-shaped movable scroll 25 is arranged on the front side of the fixed scroll 24, and a spiral movable side overlap 27 is formed on the rear surface. The front surface of the fixed scroll 24 faces the rear surface of the movable scroll 25, and the fixed side overlap 26 meshes with the movable side overlap 27. The end of the fixed side overlap 26 is in slidable contact with the rear surface of the movable scroll 25 via a bucket tip seal not shown in the figure, and the end of the movable side overlap 27 is in slidable contact with the front surface of the fixed scroll 24 via a bucket tip seal not shown in the figure. A compression chamber 28 for compressing the refrigerant is formed by a region surrounded by the front surface of the fixed scroll 24, the fixed overlap 26, the rear surface of the movable scroll 25, and the movable overlap 27. The compression chamber 28 is a substantially crescent-shaped closed space when viewed from the axial direction.

[0023] A back pressure chamber 29 is formed on the front side of the movable scroll 25. High-pressure oil described later is supplied to the back pressure chamber 29, thereby pushing the movable scroll 25 toward the fixed scroll 24, thereby improving the airtightness of the compression chamber 28. A boss 31 is formed at the front surface of the movable scroll 25, and an eccentric crank end 32 is formed at the rear end of the rotating shaft 23, and the crank end 32 is embedded in the boss 31 in a rotatable state. The rotational motion of the rotating shaft 23 is transmitted to the movable scroll 25 as a rotary motion by means of the crank end 32. The movable scroll 25 is prevented from rotating by itself, for example, via a pin and a hole, and is allowed to revolve relative to the fixed scroll 24.

[0024] A discharge hole 33 penetrating in the front-to-back direction is formed in the center of the fixed scroll 24, and a discharge valve 34 capable of opening and closing the rear end side of the discharge hole 33 is provided on the rear surface of the fixed scroll 24. The discharge valve 34 is a plate capable of elastic deformation, and the lower end closes the rear end side of the discharge hole 33 when the upper end side is fastened to the rear surface of the fixed scroll 24 via a bolt 35. When the movable scroll 25 revolves relative to the fixed scroll 24, the compression chamber 28 reduces the volume while shifting toward the center of the scroll. When the compression chamber 28 is outside the scroll, it is connected to the suction chamber 21 to inhale the refrigerant, and when it is in the center of the scroll, it is connected to the discharge hole 33 to discharge the compressed refrigerant. When the discharge valve 34 is subjected to the discharge pressure and elastically deformed, the lower end side is bent backward to discharge the refrigerant. A discharge chamber 41 covered by the rear shell 14 is formed on the rear side of the fixed scroll 24.

[0025] The rear shell 14 includes a separation chamber 42 for separating the refrigerant and the oil, and a storage chamber 43 for storing the separated oil. The description of oil separation is recorded later. The separation chamber 42 is arranged at a position of the rear shell 14 that is more rearward than the ejection chamber 41, and the storage chamber 43 is arranged at a position of the rear shell 14 that is more frontward than the separation chamber 42 and more downward than the ejection chamber 41. The separation chamber 42 is a circular hole opened from the lower surface side of the rear shell 14, and the lower end side is sealed and closed by a sealing member 44. The upper end of the separation chamber 42 is connected to the discharge port 16. The upper part of the separation chamber 42 is connected to the ejection chamber 41 via a transversely penetrating communication hole 45. The bottom of the separation chamber 42 is connected to the storage chamber 43 via a transversely penetrating communication hole 46.

[0026] The rear housing 14 is provided with an oil return passage 51 connected to the bottom surface of the storage chamber 43. The middle housing 13 is provided with an oil return passage 52 connected to the oil return passage 51 on one side and to the back pressure chamber 29 on the other side. Therefore, the oil stored in the storage chamber 43 is subjected to the pressure from the separation chamber 42 which becomes high pressure, and is supplied to the back pressure chamber 29 in sequence through the oil return passage 51 and the oil return passage 52. Thus, back pressure is applied to the movable scroll 25, and lubrication of various sliding parts including the bearing is performed. In addition, there is a throttle portion between the path from the storage chamber 43 to the back pressure chamber 29, and oil is supplied to the back pressure chamber 29 after the pressure is reduced from high pressure to medium pressure. In addition, the inner side of the rotating shaft 23 is provided with an oil return passage 53 extending in the axial direction and connected to the back pressure chamber 29. Therefore, the oil supplied to the back pressure chamber 29 is further supplied to the front end side of the rotating shaft 23 through the oil return passage 53. Thus, lubrication of various sliding parts including the bearing is performed. In addition, a throttle portion is present in the rotating shaft 23 , and oil reduced in pressure from medium pressure to low pressure is supplied to the front end side of the rotating shaft 23 .

[0027] Next, the oil separation structure 55 for separating the refrigerant and the oil will be described. Figure 2It is an enlarged cross-sectional view of the separation chamber 42. The oil separation structure 55 includes a separation chamber 42, a discharge pipe 61, and a spacer component 62. As described above, the separation chamber 42 is formed by a circular hole opened from the lower surface side of the rear shell 14, so it is a cylindrical internal space with the central axis as the up-down direction. The discharge pipe 61 formed in a cylindrical shape is inserted into the separation chamber 42 from the top of the separation chamber 42, and the upper end of the discharge pipe 61 is connected to the discharge port 16. In the present embodiment, the lower end of the discharge pipe 61 extends to the approximate center of the separation chamber 42 in the up-down direction. The outer diameter of the discharge pipe 61 is smaller than the inner diameter of the separation chamber 42, and a gap is formed between the inner peripheral surface 63 of the separation chamber 42 and the outer peripheral surface 64 of the discharge pipe 61. The arrows shown by the dotted lines in the figure represent the main flow of the refrigerant, and the block arrows represent the main flow of the oil. When the refrigerant including oil flows in from the communicating hole 45, it descends in a spiral shape between the inner peripheral surface 63 of the separation chamber 42 and the outer peripheral surface 64 of the discharge pipe 61. Due to the centrifugal effect when rotating in the circumferential direction, the refrigerant and the oil are separated. The gas phase refrigerant flows in from the lower end of the discharge pipe 61, rises in the discharge pipe 61, and is discharged to the outside from the discharge port 16. On the other hand, the separated oil descends along the inner peripheral surface 63 of the separation chamber 42.

[0028] The partition member 62 partitions the interior of the separation chamber 42 in the up-down direction, suppresses the refrigerant from passing downward, and allows the oil to pass downward. The partition member 62 is pressed into the separation chamber 42 from the bottom. Figure 3 : is a figure showing a partition member. (a) in the figure shows a top view of the partition member 62 observed from the upper side, (b) in the figure shows the A-A section of the partition member 62, and (c) in the figure is a three-dimensional view of the partition member 62. The partition member 62 includes a support portion 71 and a rotation promoting portion 72. The support portion 71 is cylindrical and supported by the inner circumferential surface 63 of the separation chamber 42. The rotation promoting portion 72 is a cylindrical shape having a smaller diameter than the support portion 71 and a lower end side closed by the bottom 73, and the upper end side is continuously provided with the support portion 71. Specifically, the rotation promoting portion 72 is located below the support portion 71, and the upper end side of the rotation promoting portion 72 is continuously provided with the lower end side of the support portion 71. The portion where the lower end side of the support portion 71 is continuously connected to the upper end side of the rotation promoting portion 72 is set to be R-shaped. That is, the lower end side of the support portion 71 is connected to the upper end side of the rotation promoting portion 72 by means of a continuous curved surface in a stepless manner. The spacer member 62 is formed by press working.

[0029] A plurality of communication passages 75 are formed at the rotation promoting portion 72 so as to connect the inner side and the outer side in the radial direction. Preferably, each communication passage 75 is a circular hole of the same diameter that penetrates in the radial direction, and is arranged to be two communication passages facing each other on a straight line passing through the center of the circle when viewed from the top and bottom directions. Therefore, the separated oil is discharged radially outward from each communication passage 75 along the inner circumferential surface of the support portion 71 and the inner circumferential surface of the rotation promoting portion 72. In this way, the separated oil passes to the lower side of the spacer member 62 and flows to the storage chamber 43. The communication passage 75 is arranged to contact the upper surface of the bottom 73 so that the oil will not accumulate on the inner bottom surface of the rotation promoting portion 72.

[0030] The support portion 71 is pressed into the inner circumferential surface 63 of the separation chamber 42, so in order to set the tightening margin, the outer diameter of the support portion 71 is slightly larger than the inner diameter of the separation chamber 42. The radially outer corner 74 of the upper end of the support portion 71 is chamfered or R-chamfered (rounded corner processing). The rotation promoting portion 72 is smaller in diameter than the support portion 71 in order to promote the rotation of the refrigerant that rotates along the inner circumferential surface 63 of the separation chamber 42 while descending. If the inner diameter of the rotation promoting portion 72 is too small, the discharge performance of the oil is reduced, and if the inner diameter of the rotation promoting portion 72 is too large, the effect of promoting the rotation of the refrigerant is reduced. Therefore, the inner diameter of the rotation promoting portion 72 is set to the range of about 40% to 60% of the inner diameter of the support portion 71, preferably about 50%. In addition, if the thickness variation of the cross section of the support portion 71 is large relative to the average thickness, the holding force when pressed into the inner circumferential surface 63 of the separation chamber 42 is reduced. Therefore, the thickness variation of the cross section of the support portion 71 is set to be within 20% of the average thickness.

[0031] "effect"

[0032] Next, the main effects of the first embodiment are described. The refrigerant that descends while rotating along the inner circumferential surface 63 of the separation chamber 42 is discharged from the lower end of the discharge pipe 61 as described above, but a part of the refrigerant further descends while rotating along the inner circumferential surface 63 of the separation chamber 42. The separated oil is easily stored at the bottom of the separation chamber 42. In order to suppress the high-pressure refrigerant from lifting it, it is considered to set a partition plate, and the partition plate is provided with a cutout for passing the oil. However, in a structure that only forms a simple cutout that is connected in the up and down directions, not only the oil passes, but also the refrigerant still passes. If the refrigerant passes through the partition plate, the oil storage area below the partition plate will be lifted, and there is a possibility that the separation performance of the oil will decrease. Therefore, there is room for improvement in the separation performance of the oil.

[0033] Therefore, in this embodiment, a connecting passage 75 that allows the radial inner side and the outer side to penetrate is formed at the spacing member 62, so that the refrigerant is difficult to pass through compared with a simple structure that is connected in the up and down directions. In addition, the rotation promotion portion 72 of the spacing member 62 is smaller in diameter than the supporting portion 71, so the rotation of the refrigerant that descends while rotating along the inner circumferential surface 63 of the separation chamber 42 is promoted. Figure 3 The arrows shown by the dotted lines in (b) indicate the flow of the refrigerant, and the block arrows indicate the flow of the oil. When the refrigerant descending while rotating transitions from the support portion 71 to the rotation promotion portion 72, the rotation speed increases, and the streamlines in the rotation direction become stronger, so it is difficult to pass through the connecting passage 75, and then collide with the inner bottom surface of the rotation promotion portion 72 and rise. Therefore, the refrigerant is inhibited from passing to the lower side of the spacer component 62, thereby improving the separation performance of the oil. In fact, according to the analysis results of the inventors, it was found that the flow of the refrigerant hardly occurs below the spacer component 62.

[0034] The spacer component 62 is set to an R-shape at the position where the support portion 71 and the rotation promotion portion 72 are continuously connected. Thus, the oil and the refrigerant can be smoothly guided to the rotation promotion portion 72. In particular, the refrigerant descends while rotating, but when the rotation speed and streamline weaken, it becomes easy to pass through the connecting passage 75. Therefore, by setting it to be smoothly guided from the support portion 71 to the rotation promotion portion 72, the rotation speed and streamline do not weaken, it becomes difficult to pass through the connecting passage 75, and the separation performance of the oil is improved. In addition, the spacer component 62 is such that the rotation promotion portion 72 is located below the support portion 71, the upper end side of the rotation promotion portion 72 is continuously provided with the lower end side of the support portion 71, and the radial outer side of the upper end of the support portion 71 is chamfered. Thus, the operability when the spacer component 62 is pressed into the separation chamber 42 is improved.

[0035] In addition, a plurality of connecting passages 75 that penetrate the rotation promotion portion 72 laterally are formed at the spacing member 62. Thus, compared with a structure that is connected in the up-down direction, it is difficult for the refrigerant to pass through, and the oil separation performance is improved. In addition, a plurality of connecting passages 75 are formed, thereby, the discharge of the oil is not blocked. In addition, the spacing member 62 is formed with two connecting passages 75 that are arranged to face each other on a straight line along the horizontal direction. Thus, the two connecting passages 75 can be formed by a single hole opening process, and the processability is excellent. In addition, the thickness variation of the cross section of the support portion 71 is within 20% relative to the average thickness. Thus, the reduction in the holding force when the spacing member 62 is pressed into the inner circumferential surface 63 of the separation chamber 42 can be suppressed. Furthermore, the spacing member 62 is formed by press working, so the processability is improved compared to a solid shape filled inside, and the cost can be suppressed.

[0036] 《Variation Example》

[0037] In the first embodiment, the communication path 75 penetrates in the radial direction (lateral direction), but the present invention is not limited thereto. It may penetrate inward and outward in the radial direction instead of in the radial direction, so the penetration direction of the communication path 75 may be inclined in the vertical direction. Figure 4 1 is a diagram showing a modified example of the spacer member (through direction). Here, the communication passage 75 is penetrated in a manner that descends downward as it goes radially outward. Thus, compared with the case where the communication passage 75 is penetrated in the radial direction, the processing is easier and the oil can easily pass to the bottom of the spacer member 62.

[0038] In the first embodiment, the inner diameter of the rotation promoting portion 72 is made substantially uniform and a step is provided between the support portion 71 and the rotation promoting portion 72, but the present invention is not limited thereto. The rotation promoting portion 72 may also be a conical structure in which the upper end has the same diameter as the support portion 71 and the diameter gradually decreases toward the lower side. The conical shape may be linear or nonlinear. Figure 5 7 is a diagram showing a modified example of the spacer member (cone). Here, the rotation promoting portion 72 is set to a linear cone shape. In addition, the connecting path 75 is penetrated in the radial direction. Thus, there is no step between the support portion 71 and the rotation promoting portion 72, and the oil and the refrigerant are smoothly guided to the rotation promoting portion 72.

[0039] In addition, in the first embodiment, two communication paths 75 are formed at the spacer member 62, but the present invention is not limited thereto, and one or more than three communication paths 75 may be formed. When there are three or more communication paths 75, it is preferred to set the spacer member 62 to four communication paths 75 staggered every 90 degrees in the circumferential direction in consideration of the time required for drilling the communication paths 75. In addition, in the first embodiment, the spacer member 62 is formed by press working, but the present invention is not limited thereto, and casting may be performed. Furthermore, the support portion 71 and the rotation promoting portion 72 may be formed by separate components and then connected to each other.

[0040] Second Implementation Method

[0041] "structure"

[0042] The second embodiment shows another structure of the spacer member. Detailed description of the parts common to the first embodiment will be omitted. Figure 6 It is an enlarged cross-sectional view of the separation chamber of the second embodiment. The oil separation structure 55 includes a partition member 82 . Figure 7 1 and 2 are diagrams showing a spacer member. (a) shows a state where the spacer member 82 is viewed from the upper side, (b) shows a B-B cross section of the spacer member 82, and (c) is a stereoscopic view of the spacer member 82.

[0043] The spacer component 82 includes a support portion 91 and a rotation promoting portion 92. The support portion 91 is cylindrical and supported by the inner circumferential surface 63 of the separation chamber 42. The rotation promoting portion 92 is cylindrical and has a smaller diameter than the support portion 91 and is closed at the lower end by the bottom 93, and the upper end is continuously provided with the support portion 91. Specifically, the rotation promoting portion 92 is located radially inward compared with the support portion 91, and the upper end of the rotation promoting portion 92 is continuously provided with the upper end of the support portion 91, and is configured to be a shape that allows the upper end of the rotation promoting portion 92 to be folded back radially outward. The portion where the upper end of the support portion 91 is continuously connected to the upper end of the rotation promoting portion 92 is configured to be R-shaped. That is, the upper end of the support portion 91 is connected to the upper end of the rotation promoting portion 92 by means of a continuous curved surface in a stepless manner. The spacer component 82 is formed by press working.

[0044] Two connecting passages 95 are formed at the rotation promoting portion 92 so as to connect the inner side and the outer side in the radial direction. The two connecting passages 95 are circular holes of the same diameter that penetrate in the radial direction and are arranged to face each other on a straight line passing through the center of the circle when viewed from the top and bottom directions. Therefore, the separated oil is discharged from the two connecting passages 95 to the radial outside along the inner peripheral surface of the rotation promoting portion 92. In this way, the separated oil passes to the lower side of the spacer member 62 and flows to the storage chamber 43. The connecting passage 95 is arranged on the bottom 93 side of the rotation promoting portion 92 so that the oil will not accumulate on the inner bottom surface of the rotation promoting portion 92.

[0045] The support portion 91 is pressed into the inner circumferential surface 63 of the separation chamber 42, so in order to set a tightening margin, the outer diameter of the support portion 91 is slightly larger than the inner diameter of the separation chamber 42. The radially outer corner 94 of the upper end of the support portion 91 is formed into an R shape by press working. The rotation promoting portion 92 is smaller in diameter than the support portion 91 in order to promote the rotation of the refrigerant that rotates along the inner circumferential surface 63 of the separation chamber 42 and descends. If the inner diameter of the rotation promoting portion 92 is too small, the discharge performance of the oil is reduced, and if the inner diameter of the rotation promoting portion 92 is too large, the effect of promoting the rotation of the refrigerant is reduced. Therefore, the inner diameter of the rotation promoting portion 92 is set to a range of, for example, about 40% to 60% of the inner diameter of the support portion 91, preferably about 50%.

[0046] "effect"

[0047] Next, main functions and effects of the second embodiment will be described.

[0048] In this embodiment, the spacing member 82 is such that the rotation promoting portion 92 is located radially inward compared to the support portion 91, and the upper end side of the rotation promoting portion 92 is provided continuously with the upper end side of the support portion 91. In the first embodiment, it is necessary to perform chamfering on the radial outer side of the upper end of the support portion 71, but in the second embodiment, the radial outer corner 94 of the upper end of the support portion 91 is formed into an R shape by press working. Therefore, the chamfering process can be omitted, so the man-hours can be reduced. The other effects are the same as those of the first embodiment described above.

[0049] 《Variation Example》

[0050] In the second embodiment, the communication passage 95 is formed as a circular hole, but the present invention is not limited thereto. The communication passage 95 may be formed in any shape as long as it passes through the inner side and the outer side in the radial direction. Figure 8 : is a diagram showing a modified example of the spacing member (long hole). Here, the connecting passage 95 is set to a long hole shape or an elliptical shape that is elongated in the circumferential direction. In addition, the connecting passage 75 is penetrated in the radial direction. As a result, compared with the case where the connecting passage 95 is set to a circular hole (a perfect circle), the opening area is increased, and it is easy for oil to pass to the bottom of the spacing member 62. In addition, in order to ensure the same opening area, the connecting passage 95 can also be made longer in the vertical direction, but there is also the possibility that the vertical dimensions of the rotation promotion part 92 will increase. Therefore, if the connecting passage 95 is made longer in the circumferential direction, it is beneficial to save space.

[0051] Although the embodiments are described above with reference to the limited number of embodiments, the scope of rights is not limited to them, and modifications of the embodiments based on the above disclosure are obvious to those skilled in the art.

[0052] Description of Reference Numerals

[0053] 11... compressor, 12... front housing, 13... middle housing, 14... rear housing, 16... discharge port, 21... suction chamber, 22... electric motor, 23... rotating shaft, 24... fixed scroll, 25... movable scroll, 26... fixed side overlap, 27... movable side overlap, 28... compression chamber, 29... back pressure chamber, 31... boss, 32... crank end, 33... discharge hole, 34... discharge valve, 35... bolt, 41... discharge chamber, 42... separation chamber, 43... storage chamber, 44... …closing member, 45…connecting hole, 46…connecting hole, 51…return oil flow path, 52…return oil flow path, 53…return oil flow path, 55…oil separation structure, 61…discharge piping, 62…spacer member, 63…inner peripheral surface, 64…outer peripheral surface, 71…support portion, 72…rotation promoting portion, 73…bottom portion, 74…corner portion, 75…connecting path, 82…spacer member, 91…support portion, 92…rotation promoting portion, 93…bottom portion, 94…corner portion, 95…connecting path.

Claims

1. A compressor for compressing a heat medium including oil, characterized in that: An oil separation structure is provided for separating the compressed heat medium and the oil. The oil separation structure comprises a separation chamber and a partition member. The separation chamber is a cylindrical internal space with the central axis as the vertical direction, into which the heat medium and the oil flow and rotate in the circumferential direction along the inner circumferential surface, so that the heat medium and the oil are separated. The partition member partitions the separation chamber in the vertical direction. The aforementioned spacing member comprises a supporting portion and a rotation promoting portion, The supporting portion is supported by the inner peripheral surface of the separation chamber and is cylindrical. The upper end side of the aforementioned rotation promoting part is formed continuously with the aforementioned supporting part, has a smaller diameter than the supporting part, and has a closed lower end side and is cylindrical. The rotation promoting portion is formed with a communication path that penetrates the inner side and the outer side in the radial direction, and promotes the rotation of the heat medium that descends while rotating along the inner peripheral surface of the separation chamber. The aforementioned spacing member is configured such that a portion where the aforementioned support portion and the aforementioned rotation promoting portion are continuously connected is set to be R-shaped, the aforementioned rotation promoting portion is located radially inward compared to the aforementioned support portion, and the upper end side of the aforementioned rotation promoting portion is continuously provided with the upper end side of the aforementioned support portion.

2. The compressor according to claim 1, characterized in that The partition member is formed with a plurality of the communication paths that penetrate the rotation promoting portion in a transverse direction.

3. The compressor according to claim 2, characterized in that The partition member is formed with the two communication paths disposed so as to face each other on a straight line along the lateral direction.

4. The compressor according to any one of claims 1 to 3, characterized in that The spacing member is such that a thickness variation in a cross section of the support portion is within 20% of an average thickness.

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