WO2019225510A1

WO2019225510A1 - Oil separation structure and compressor

Info

Publication number: WO2019225510A1
Application number: PCT/JP2019/019746
Authority: WO
Inventors: 美早子冠城
Original assignee: サンデン・オートモーティブコンポーネント株式会社
Priority date: 2018-05-24
Filing date: 2019-05-17
Publication date: 2019-11-28
Also published as: JP2019203651A

Abstract

[Problem] To improve oil separation performance. [Solution] An oil separation structure provided with a partition member 61 which partitions the interior of a separation chamber 42 in the vertical direction and in which is formed a connecting passage 66 through which oil passes. The connecting passage 66 is provided with a section extending in the horizontal direction.

Description

Oil separation structure, compressor

The present invention relates to an oil separation structure and a compressor.

Patent Document 1 discloses a structure for centrifuging oil from a refrigerant, and a partition plate for suppressing oil splashing is provided above an oil reservoir in the container. A notch that communicates in the vertical direction is formed at the periphery of the partition plate, and the oil flows to the oil reservoir through this notch.

Japanese Patent Laying-Open No. 2015-215148

Even if the partition plate is provided, if a simple notch communicating in the vertical direction is formed, the refrigerant easily passes therethrough, so there is room for improvement in oil separation performance.
An object of the present invention is to improve oil separation performance.

The oil separation structure according to one aspect of the present invention is:
An internal space extending in the vertical direction, separating the inflowing heat medium and oil, and a separation chamber in which the separated oil flows downward;
A partition member in which the separation chamber is partitioned in the vertical direction and a communication passage through which oil passes is formed, and
The communication path includes a section extending in the lateral direction.

According to the present invention, the communication passage through which the oil passes has a section extending in the horizontal direction, so that the heat medium is less likely to pass compared to a simple structure communicating in the vertical direction. Thereby, the oil separation performance is improved.

It is sectional drawing along the front-back direction and the up-down direction in a compressor. It is an expanded sectional view of a separation chamber. It is a figure which shows a partition member. It is an expanded sectional view of the separation chamber in a second embodiment. It is a figure which shows the partition member of 2nd embodiment. It is a figure which shows the modification which turned the partition member of 2nd embodiment upside down. It is an expanded sectional view of the separation chamber in a third embodiment. It is a figure which shows the partition member of 3rd embodiment. It is a figure which shows the modification which turned the partition member of 3rd embodiment upside down.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each drawing is schematic and may be different from the actual one. Further, the following embodiments exemplify apparatuses and methods for embodying the technical idea of the present invention, and the configurations are not specified as follows. That is, the technical idea of the present invention can be variously modified within the technical scope described in the claims.

<< First embodiment >>
"Constitution"
In the following description, three directions orthogonal to each other are referred to as a front-rear direction, a left-right direction, and a vertical direction for convenience.
FIG. 1 is a cross-sectional view of the compressor along the front-rear direction and the vertical direction.
The compressor 11 is an electric scroll compressor used in a refrigerant circuit of a car air conditioner, for example, and sucks in a refrigerant (heat medium), compresses it, and then discharges it.

The compressor 11 is integrated with a front housing 12, a center housing 13, and a rear housing 14 arranged in order from the front side along the front-rear direction so as to maintain airtightness. A suction port (not shown) for sucking refrigerant is formed in the upper portion of the front housing 12, and a discharge port 16 for discharging compressed refrigerant is formed in the upper portion of the rear housing 14.
The front housing 12 includes a suction chamber 21 communicating with a suction port (not shown), and an electric motor 22 is accommodated in the suction chamber 21. The rotating shaft 23 of the electric motor 22 is rotatably supported at the front side by the front housing 12 and is rotatably supported by the center housing 13 at the rear side.

A fixed scroll 24 and a movable scroll 25 are accommodated in the center housing 13.
The disk-shaped fixed scroll 24 is fixed so as to close the rear side of the center housing 13, and a spiral fixed-side wrap 26 is formed on the front surface. The disc-shaped movable scroll 25 is disposed in front of the fixed scroll 24, and a spiral movable side wrap 27 is formed on the rear surface. The front surface of the fixed scroll 24 and the rear surface of the movable scroll 25 face each other, and the fixed side wrap 26 and the movable side wrap 27 are engaged with each other. The tip of the fixed side wrap 26 slidably contacts the rear surface of the movable scroll 25 via a tip seal (not shown), and the tip of the movable side wrap 27 slides on the front surface of the fixed scroll 24 via a tip seal (not shown). Contact is possible. A pressure chamber 28 for compressing the refrigerant is formed by a section surrounded by the front surface of the fixed scroll 24, the fixed side wrap 26, the rear surface of the movable scroll 25, and the movable side wrap 27. When viewed from the front-rear direction, the pressure chamber 28 is a crescent-shaped sealed space.

A back pressure chamber 29 is formed on the front side of the movable scroll 25. The back pressure chamber 29 is supplied with high-pressure oil, which will be described later, so that the movable scroll 25 is pressed against the fixed scroll 24 and the hermeticity of the pressure chamber 28 is enhanced.
A boss 31 is formed on the front surface of the movable scroll 25, an eccentric crank end portion 32 is formed at the rear end of the rotating shaft 23, and the crank end portion 32 is fitted in the boss 31 in a rotatable state. Yes. The rotating motion of the rotating shaft 23 is transmitted to the movable scroll 25 as a turning motion by the crank end portion 32. The movable scroll 25 is prevented from rotating, for example, via a ball coupling, and is allowed to revolve with respect to the fixed scroll 24.

A discharge hole 33 penetrating in the front-rear 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 an elastically deformable plate material, and closes the rear end side of the discharge hole 33 on the lower end side with the upper end side fastened to the rear surface of the fixed scroll 24 via the bolt 35.
When the movable scroll 25 revolves with respect to the fixed scroll 24, the pressure chamber 28 is displaced toward the scroll center as seen from the front-rear direction, and the volume is reduced. The pressure chamber 28 communicates with the suction chamber 21 when it is outside the scroll, and sucks the refrigerant. When the pressure chamber 28 is located at the center of the scroll, the pressure chamber 28 communicates with the discharge hole 33 and discharges the compressed refrigerant. When receiving the discharge pressure, the discharge valve 34 causes the lower end side to bend backward by elastic deformation, thereby discharging the refrigerant.

Next, the oil separation structure will be described.
The rear housing 14 includes a separation chamber 42 that separates the refrigerant and the oil, and a storage chamber 43 that stores the separated oil.
The upper end of the separation chamber 42 communicates with the discharge port 16. The bottom of the separation chamber 42 communicates with the bottom of the storage chamber 43 through the communication hole 46.
In the rear housing 14, an oil return channel 51 that communicates with the bottom surface of the storage chamber 43 is formed. The center housing 13 is formed with an oil return channel 52, one of which communicates with the oil return channel 51 and the other of which communicates with the back pressure chamber 29. Therefore, the oil stored in the storage chamber 43 receives the pressure from the separation chamber 42 that becomes high pressure, and is supplied to the back pressure chamber 29 through the oil return channel 51 and the oil return channel 52 in this order. A throttle mechanism (not shown) is provided between the storage chamber 43 and the back pressure chamber 29, and the pressure is reduced from high pressure to medium pressure, and oil is supplied to the back pressure chamber 29. As a result, a back pressure is applied to the movable scroll 25 to lubricate each sliding portion including the bearing. In addition, an oil return channel 53 that extends along the front-rear direction and communicates with the back pressure chamber 29 is formed inside the rotating shaft 23. Therefore, the oil supplied to the back pressure chamber 29 is further supplied to the front end side of the rotating shaft 23 via the oil return channel 53. In addition, a throttle mechanism (not shown) is provided inside the rotary shaft 23, and oil whose pressure has been reduced from medium pressure to low pressure is supplied to the front end side of the rotary shaft 23. Thereby, each sliding part including a bearing is lubricated.

FIG. 2 is an enlarged cross-sectional view of the separation chamber.
The separation chamber 42 is an internal space having an inner peripheral surface 55 that extends in the vertical direction (axial direction) and has a circular cross section along the horizontal direction (axial perpendicular direction). In the separation chamber 42, the upper end of the discharge pipe 56 formed in a cylindrical shape is connected to the discharge port 16, and the lower end of the discharge pipe 56 extends to the approximate center in the vertical direction in the separation chamber 42. An arrow indicated by a dotted line represents a refrigerant flow, and a block arrow represents an oil flow. When the refrigerant containing oil flows in from the communication hole 44, the refrigerant descends spirally between the inner peripheral surface 55 and the outer peripheral surface 57, and the refrigerant and the oil are separated by centrifugal action when turning in the circumferential direction. The When the separated refrigerant flows in from the lower end of the discharge pipe 56, it rises in the discharge pipe 56 and is discharged to the outside from the discharge port 16. The separated oil descends along the inner peripheral surface 55 of the separation chamber 42.

A partition member 61 that partitions the interior of the separation chamber 42 in the vertical direction and allows oil to pass therethrough is provided in the separation chamber 42.
The partition member 61 is fitted in the separation chamber 42 and includes an upper plate member 62 and a lower plate member 63 that are arranged in the vertical direction with the surface direction set to the horizontal direction. The upper plate member 62 and the lower plate member 63 are fitted into the separation chamber 42 by, for example, press-fitting.
FIG. 3 is a diagram illustrating a partition member.
(A) in the figure is a view of the upper plate member 62 and the lower plate member 63 as viewed from above. (B) in the figure is an A arrow view in a state where the upper plate member 62 and the lower plate member 63 are arranged in the vertical direction. (C) in the figure is a perspective view of a state in which the upper plate member 62 and the lower plate member 63 are arranged in the vertical direction.

The upper plate member 62 has a substantially disk shape, and a plurality of upper communication passages 64 are formed at equal intervals along the circumferential direction on the outer circumferential surface on the radially outer side. Here, the three upper communication paths 64 are formed at intervals of about 120 degrees along the circumferential direction. The upper communication path 64 is a notch communicating from the upper surface to the lower surface of the plate member 62, and is formed by denting an area of about 60 degrees along the circumferential direction.
The lower plate member 63 has a substantially disk shape, and a plurality of lower communication passages 65 are formed at equal intervals along the circumferential direction on the outer circumferential surface on the radially outer side. Here, three lower communication passages 65 are formed at intervals of about 120 degrees along the circumferential direction. The lower communication path 65 is a notch communicating from the upper surface to the lower surface of the plate member 63, and is formed by denting a region of about 60 degrees along the circumferential direction.

The lower communication path 65 is disposed so as not to overlap the upper communication path 64 when viewed from the vertical direction. Here, the lower communication path 65 is formed at a position shifted by about 60 degrees with respect to the upper communication path 64. Specifically, the upper plate member 62 and the lower plate member 63 are used as a common component, and the angular positions of both are relatively shifted by about 60 degrees.
The upper plate member 62 and the lower plate member 63 are provided substantially in parallel with a gap d in the vertical direction.
Accordingly, the separated oil descends to the bottom of the separation chamber 42 through the upper communication path 64, the gap d, and the lower communication path 65 in this order, and is discharged from the communication hole 46 to the storage chamber 43. That is, the plurality of upper communication passages 64, the gaps d, and the plurality of lower communication passages 65 serve as communication passages 66 for allowing oil to pass, and the gaps d correspond to sections extending in the lateral direction.

<Action>
Next, main functions and effects of the first embodiment will be described.
A separation plate is provided at the bottom of the separation chamber 42 to prevent the separated oil from accumulating and the high-pressure refrigerant is wound up, and a notch for allowing the oil to pass through the partition plate is provided. It is possible. However, there is room for improvement in the oil separation performance because the refrigerant can easily pass by simply forming a simple notch communicating in the vertical direction.

Therefore, in this embodiment, a partition member 61 is provided in the separation chamber 42, and a section extending in the lateral direction is provided in the communication path 66 for allowing oil to pass therethrough. Specifically, an upper plate member 62 and a lower plate member 63 are provided, an upper communication path 64 is formed in the upper plate member 62, and an upper side of the lower plate member 63 is viewed from above and below. A lower communication path 65 is formed at a position that does not overlap with the communication path 64. A gap d is provided between the upper plate member 62 and the lower plate member 63. This gap d is a section extending in the horizontal direction. Thereby, it becomes difficult for a refrigerant to pass compared with the simple structure connected in the up-down direction.

This is because the refrigerant descending the separation chamber 42 always collides with the upper surface of the upper plate member 62 or the upper surface of the lower plate member 63. That is, since the upper communication path 64 and the lower communication path 65 are arranged so as not to overlap each other when viewed from the vertical direction, the upper communication path 64 and the lower communication path 65 are not changed without changing the direction of the refrigerant. You cannot pass through both. As shown in FIG. 3C, even if it passes straight through the upper communication path 64, it collides with the upper surface of the lower plate member 63 and is forced to change its direction in the lateral direction. In this way, the oil separation performance can be improved by making it difficult for the refrigerant to pass through.

<Modification>
In the first embodiment, three communication paths are formed for the

plate members

62 and 63 constituting the partition member 61, respectively, but the present invention is not limited to this. One, two, or four or more communication paths may be formed.
In the first embodiment, the upper communication path 64 and the lower communication path 65 are configured by notches formed on the outer circumferential surface of the plate member on the radially outer side, but are not limited thereto. You may comprise a plate member by the through-hole penetrated to an up-down direction.

<< Second Embodiment >>
"Constitution"
The second embodiment shows another configuration of the partition member.
Detailed description of portions common to the above-described first embodiment will be omitted.
FIG. 4 is an enlarged cross-sectional view of the separation chamber in the second embodiment.
A partition member 71 that partitions the interior of the separation chamber 42 in the vertical direction and allows oil to pass therethrough is provided in the separation chamber 42. The partition member 71 is fitted in the separation chamber 42 by press-fitting, for example.

FIG. 5 is a view showing a partition member according to the second embodiment.
(A) in the figure is the figure which looked at the partition member 71 from upper direction. (B) in the drawing is a cross-sectional view of the partition member 71. (B) in the figure is a perspective view of the partition member 71.
The partition member 71 includes a large diameter portion 72 and a small diameter portion 73.
The large diameter portion 72 has a substantially cylindrical shape that is short in the axial direction, and is fitted in the separation chamber 42.
The small diameter portion 73 has a substantially cylindrical shape that is short in the axial direction, is formed on the upper surface side of the large diameter portion 72, and has an outer diameter smaller than that of the large diameter portion 72.
The partition member 71 has a recess 74 that is recessed from the lower surface of the large diameter portion 72 toward the small diameter portion 73. The recess 74 is recessed from the lower surface of the large diameter portion 72 to a position higher than the upper surface of the large diameter portion 72.

The partition member 71 has a plurality of through holes 75 penetrating from the outer peripheral surface of the small diameter portion 73 to the recess 74 along the radial direction. The through holes 75 are formed at equal intervals along the circumferential direction. Here, the four through holes 75 are formed at intervals of about 90 degrees along the circumferential direction.
Therefore, the separated oil descends to the bottom of the separation chamber 42 through the through hole 75 and the recess 74 in this order, and is discharged from the communication hole 46 to the storage chamber 43. That is, the plurality of through-holes 75 and the concave portions 74 serve as communication passages 76 for allowing the oil to pass therethrough, and the through-holes 75 thereof correspond to sections extending in the lateral direction.
A filter 77 for filtering oil is provided on the outlet side of the communication path 76. The filter 77 is fixed in the recess 74.

<Action>
Next, main effects of the second embodiment will be described.
In the present embodiment, a partition member 71 is provided in the separation chamber 42, and a section extending in the lateral direction is provided in the communication passage 76 for allowing oil to pass therethrough. Specifically, the partition member 71 is formed of a large diameter portion 72 and a small diameter portion 73, a concave portion 74 that is recessed from the lower surface of the large diameter portion 72 toward the small diameter portion 73, and a radial direction from the outer peripheral surface of the small diameter portion 73. And a through-hole 75 penetrating to the concave portion 74. This through hole 75 is a section extending in the lateral direction. Thereby, it becomes difficult for a refrigerant to pass compared with the simple structure connected in the up-down direction.

This is because the refrigerant descending the separation chamber 42 always collides with the upper surface of the large diameter portion 72. That is, since the through-hole 75 extends in the lateral direction, the refrigerant collides with the upper surface of the large diameter portion 72 and is forced to change direction in the lateral direction. Thus, it becomes difficult for the refrigerant to pass through, so that the oil separation performance can be improved.
Further, a filter 77 for filtering oil is provided on the outlet side of the communication path 76. As a result, contamination can be removed, and foreign substances can be prevented from getting stuck in the compressor 11 and flow path clogging can be suppressed.

<Modification>
In the second embodiment, the small-diameter portion 73 is formed on the upper surface side of the large-diameter portion 72. However, the present invention is not limited to this, and the configuration in which the partition member 71 is turned upside down, that is, the small-diameter portion 73. May be formed on the lower surface side of the large diameter portion 72.
FIG. 6 is a view showing a modification in which the partition member of the second embodiment is turned upside down.
As described above, the above-described effects can be obtained even when the partition member 71 is turned upside down.
In the second embodiment, four through holes 75 are formed in the partition member 71, but the present invention is not limited to this. You may form the through-hole 75 within three or five or more.
In the second embodiment, the filter 77 is provided on the outlet side of the communication path 76, but the present invention is not limited to this, and the filter 77 may be omitted.

<< 3rd embodiment >>
"Constitution"
The third embodiment shows another configuration of the partition member.
Detailed description of portions common to the above-described first embodiment will be omitted.
FIG. 7 is an enlarged cross-sectional view of the separation chamber in the third embodiment.
In the separation chamber 42, a partition member 81 that partitions the separation chamber 42 in the vertical direction and allows oil to pass therethrough is provided. The partition member 81 is fitted in the separation chamber 42 by press-fitting, for example.

FIG. 8 is a view showing a partition member according to the third embodiment.
(A) in the figure is the figure which looked at the partition member 81 from upper direction. (B) in the drawing is a cross-sectional view of the partition member 81. (B) in the figure is a perspective view of the partition member 81.
The partition member 81 includes a large diameter portion 82 and a small diameter portion 83.
The large-diameter portion 82 has a substantially cylindrical shape that is short in the axial direction, and is fitted in the separation chamber 42.
The small-diameter portion 83 has a substantially conical shape that is short in the axial direction, is formed on the upper end side of the large-diameter portion 82, and the outer diameter decreases toward the tip.
The partition member 81 has a recess 84 that is recessed from the lower surface of the large diameter portion 82 toward the small diameter portion 83. The recess 84 is recessed from the lower surface of the large diameter portion 82 to a position higher than the upper end of the large diameter portion 82.

The partition member 81 is formed with a plurality of through holes 85 penetrating from the outer peripheral surface of the small diameter portion 83 to the concave portion 84 along the radial direction. The through-hole 85 has a slight downward gradient toward the radially inner side. The through holes 85 are formed at equal intervals along the circumferential direction. Here, the four through holes 85 are formed at intervals of about 90 degrees along the circumferential direction.
Accordingly, the separated oil descends to the bottom of the separation chamber 42 through the through hole 85 and the recess 84 in this order, and is discharged from the communication hole 46 to the storage chamber 43. That is, the plurality of through-holes 85 and the recesses 84 serve as communication passages 86 for allowing the oil to pass therethrough, and the through-holes 85 correspond to sections extending in the lateral direction.
A filter 87 for filtering oil is provided on the outlet side of the communication path 86. The filter 87 is fixed by being fitted into the recess 84.

<Action>
Next, main effects of the third embodiment will be described.
In the present embodiment, a partition member 81 is provided in the separation chamber 42, and a section extending in the lateral direction is provided in the communication passage 86 for allowing oil to pass therethrough. Specifically, the partition member 81 is formed of a large diameter portion 82 and a small diameter portion 83, a concave portion 84 that is recessed from the lower surface of the large diameter portion 82 toward the small diameter portion 83, and a radial direction from the outer peripheral surface of the small diameter portion 83. And a through hole 85 penetrating to the concave portion 84. This through hole 85 is a section extending in the horizontal direction. Thereby, it becomes difficult for a refrigerant to pass compared with the simple structure connected in the up-down direction.

This is because the refrigerant descending the separation chamber 42 always collides with the conical surface of the small diameter portion 83 or the floor portion near the inlet in the through hole 85. That is, since the through-hole 85 extends substantially in the lateral direction, the refrigerant collides with the conical surface of the small-diameter portion 83 or the floor portion near the inlet in the through-hole 85 and is forced to change direction in the substantially lateral direction. Become. Thus, it becomes difficult for the refrigerant to pass through, so that the oil separation performance can be improved. Moreover, since the through-hole 85 has a slight downward slope toward the inner side in the radial direction, the oil can pass smoothly.
A filter 87 for filtering oil is provided on the outlet side of the communication path 86. As a result, contamination can be removed, and foreign substances can be prevented from getting stuck in the compressor 11 and flow path clogging can be suppressed.

<Modification>
In the third embodiment, the small-diameter portion 83 is formed on the upper surface side of the large-diameter portion 82. However, the present invention is not limited to this, and the configuration in which the partition member 81 is turned upside down, that is, the small-diameter portion 83 is used. May be formed on the lower surface side of the large diameter portion 82.
FIG. 9 is a view showing a modification in which the partition member of the third embodiment is turned upside down.
As described above, the above-described effects can be obtained even with the configuration in which the partition member 81 is turned upside down.
In the third embodiment, four through holes 85 are formed in the partition member 81, but the present invention is not limited to this. You may form the through-hole 85 within three or five or more.
In the second embodiment, the filter 87 is provided on the outlet side of the communication path 86, but the present invention is not limited to this, and the filter 87 may be omitted.

The above description has been made with reference to a limited number of embodiments. However, the scope of rights is not limited thereto, and modifications of the embodiments based on the above disclosure are obvious to those skilled in the art.

DESCRIPTION OF SYMBOLS 11 ... Compressor, 12 ... Front housing, 13 ... Center housing, 14 ... Rear housing, 16 ... Discharge port, 21 ... Suction chamber, 22 ... Electric motor, 23 ... Rotating shaft, 24 ... Fixed scroll, 25 ... Moveable scroll, 26 ... Fixed side wrap, 27 ... Movable side wrap, 28 ... Pressure chamber, 29 ... Back pressure chamber, 31 ... Boss, 32 ... Crank end, 33 ... Discharge hole, 34 ... Discharge valve, 35 ... Bolt, 42 ... Separation Chamber, 43 ... storage chamber, 44 ... communication hole, 46 ... communication hole, 47 ... shielding part, 51 ... oil return channel, 52 ... oil return channel, 53 ... oil return channel, 55 ... inner peripheral surface, 56 DESCRIPTION OF SYMBOLS ... Discharge piping, 57 ... Outer peripheral surface, 61 ... Partition member, 62 ... Plate member, 63 ... Plate member, 64 ... Upper communication path, 65 ... Lower communication path, 66 ... Communication path, 71 ... Partition member, 72 ... Large Diameter portion, 73 ... small diameter portion, 74 ... concave portion, 7 ... through hole, 76 ... communicating passage, 77 ... Filter, 81 ... partitioning member, 82 ... larger diameter portion, 83 ... smaller diameter portion, 84 ... concave portion, 85 ... through hole, 86 ... communicating passage, 87 ... filter

Claims

An internal space extending in the vertical direction, separating the inflowing heat medium and oil, and a separation chamber in which the separated oil flows downward;
A partition member in which the separation chamber is partitioned in the vertical direction, and a communication passage through which the oil passes is formed,
The oil separation structure, wherein the communication path includes a section extending in a lateral direction.
The partition member is
A plurality of plate members that are fitted in the separation chamber and arranged in the vertical direction in a state in which the surface direction is in the horizontal direction,
The communication path is
An upper communication path formed in the upper plate member and communicating in the vertical direction;
Of the lower plate member, a lower communication path formed in a position not overlapping with the upper communication path when viewed from the vertical direction, and communicated in the vertical direction,
A vertical gap between the upper plate member and the lower plate member,
The oil separation structure according to claim 1, wherein the gap corresponds to a section extending in the lateral direction.
The partition member is
A large diameter portion fitted in the separation chamber;
Formed on one of the upper surface side and the lower surface side in the large diameter portion, and a small diameter portion having a smaller outer diameter than the large diameter portion, and
The communication path is
A recess recessed from the other of the upper surface and the lower surface of the large diameter portion toward the small diameter portion;
A through-hole penetrating from the outer peripheral surface of the small-diameter portion to the concave portion along the radial direction,
The oil separation structure according to claim 1, wherein the through hole corresponds to a section extending in the lateral direction.
The oil separation structure according to claim 3, wherein a filter for filtering the oil is provided on an outlet side of the communication path.
The separation chamber is an internal space extending in the axial direction and having a circular cross section along the direction perpendicular to the axis, and when the heat medium containing the oil flows in and swirls in the circumferential direction along the inner peripheral surface The oil separation structure according to any one of claims 1 to 4, wherein the heat medium and the oil are separated by a centrifugal action.
A compressor comprising the oil separation structure according to any one of claims 1 to 5.