JP6350576B2 - Vane type compressor - Google Patents

Description

  The present invention relates to a vane type compressor.

  As disclosed in Japanese Patent Application Laid-Open No. 2014-167290 (Patent Document 1), a vane compressor is known. The vane compressor includes a housing, a shaft, a rotor, and a plurality of vanes. A suction chamber and a cylinder chamber are formed in the housing. The rotor and the plurality of vanes are disposed in the cylinder chamber. The shaft is disposed in the housing and applies rotational power to the rotor. The refrigerant supplied from the suction chamber into the cylinder chamber (compression chamber) is compressed by the rotation of the rotor and the plurality of vanes.

  Generally, a lip seal type shaft seal device is provided between the housing and the shaft. The shaft seal device prevents the refrigerant gas from leaking along the outer peripheral surface of the shaft. In the above-mentioned Patent Document 1, a communication passage is provided in the housing, and the communication passage communicates the suction chamber and the place where the shaft seal device is provided. A part of the refrigerant in the suction chamber is supplied to the shaft seal device through the communication passage. The shaft seal device can be cooled, and lubrication of the sliding portion between the shaft and the shaft seal device can be improved.

JP 2014-167290 A

  An object of this invention is to provide the vane type compressor provided with the structure which can make it easier for the refrigerant | coolant in a suction chamber to flow toward a shaft seal apparatus through a communicating path.

A vane-type compressor according to the present invention includes a housing having a suction port and having a cylinder chamber formed therein, a shaft disposed in the housing and rotatably provided around a rotation axis, A shaft seal device provided between the housing and the shaft, a rotor having a plurality of grooves and rotating integrally with the shaft in the cylinder chamber, and a vane provided inside each of the plurality of grooves The housing has a cylindrical shape, and has a cylinder chamber forming portion that forms the cylinder chamber on the inside, a first shaft hole into which the shaft is inserted, and an axial direction of the cylinder chamber And a second wall portion having a second shaft hole into which the shaft is inserted and forming an inner surface on the other side in the axial direction of the cylinder chamber. , The cylinder chamber In addition, a compression chamber is defined by the outer peripheral surface of the rotor, the vane, the first wall portion, and the second wall portion, and a suction passage that communicates the suction port and the compression chamber is provided to form the cylinder chamber. The part is provided with a first suction port and a second suction port communicating with the suction passage and the cylinder chamber at positions separated from each other in the circumferential direction,
The shaft seal device is provided between the first shaft hole and the shaft, and the suction passage and the first shaft hole are communicated with the first wall portion so that the refrigerant from the suction port is supplied. A first communication passage and a second communication passage for supplying to the shaft seal device are provided, and at least one of the first suction port and the second suction port opens in the middle of the suction passage, The one communication passage is positioned so as to open on a side closer to the suction port than the second suction port, and the second communication passage is opened on a side farther from the suction port than the first suction port. Is located.

  Preferably, in the vane type compressor, the suction passage includes a suction chamber having an annular shape surrounding the cylinder chamber forming portion.

  Preferably, in the vane type compressor, an end portion of the second communication passage on the side opposite to the first shaft hole is an end opposite to the first shaft hole of the first communication passage in the direction of gravity. It is provided at a position higher than the part.

  In the vane compressor, preferably, the average flow path cross-sectional area of the first communication passage is 0.9 times or more and 1.1 times or less than the average flow path cross-sectional area of the second communication passage.

  In the vane type compressor, preferably, at least one of the first communication passage and the second communication passage is constituted by a plurality of through holes.

  Preferably, in the vane type compressor, the first communication passage includes a first through hole and a second through hole having a larger average flow path cross-sectional area than the first through hole. The through hole opens on the side closer to the second suction port than the first through hole.

  According to the above configuration, a differential pressure is easily generated between the end portion of the first communication passage and the end portion of the second communication passage, and the refrigerant in the suction chamber is more easily flowed toward the shaft seal device. Is possible.

It is sectional drawing which shows the vane type compressor 10 in embodiment. It is arrow sectional drawing along the II-II line | wire in FIG. It is arrow sectional drawing along the III-III line in FIG. It is a perspective view which shows typically the suction port 11a, the suction chamber 12r, the 1st communication path 24, the 2nd communication path 25, and the 1st axial hole 12h with which the vane type compressor 10 in embodiment is equipped. It is a perspective view which shows a mode that a refrigerant | coolant flows in the vane type compressor 10 in embodiment. 6 is a perspective view showing another configuration of the first communication path 24 and the second communication path 25. FIG.

  Hereinafter, embodiments will be described with reference to the drawings. The same parts and corresponding parts are denoted by the same reference numerals, and redundant description may not be repeated.

(Vane compressor 10)
FIG. 1 is a cross-sectional view showing a vane compressor 10 according to an embodiment. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 3 is a cross-sectional view taken along the line III-III in FIG.

  Referring mainly to FIG. 1, the vane compressor 10 includes a housing 11, a shaft 15, a shaft seal device 17, a rotor 18, and a plurality of vanes 19. The housing 11 has a suction port 11a and a discharge port 11e, and forms a cylinder chamber 11b inside. The housing 11 of the present embodiment includes a front housing 12, a rear housing 13, and a side plate 14 as its constituent elements.

(Front housing 12)
The front housing 12 includes a cylinder chamber forming portion 12a and a partition wall 12b (first wall portion). The cylinder chamber forming portion 12a has a cylindrical shape and forms a cylinder chamber 11b on the inner side. The cylinder chamber 11b in the cylinder chamber forming portion 12a is recessed from the rear to the front. In a direction orthogonal to the rotational axis 16 of the shaft 15, the cylinder chamber 11b has an elliptical cross-sectional shape (FIGS. 2 and 3).

  A recess 12f (FIG. 1) is formed on the outer peripheral surface of the cylinder chamber forming portion 12a. The recess 12f extends in an annular shape over the entire circumference in the circumferential direction of the cylinder chamber forming portion 12a. The suction chamber 12r is defined by the recess 12f and the inner peripheral surface of the rear housing 13. A suction chamber 12r provided outside the cylinder chamber forming portion 12a communicates with the suction port 11a. The suction chamber 12r of the present embodiment has an annular shape that surrounds the cylinder chamber forming portion 12a (FIG. 2).

  As shown in FIG. 2, the cylinder chamber forming portion 12 a is provided with a first suction port 22 and a second suction port 23. The first suction port 22 and the second suction port 23 are provided at positions separated from each other in the circumferential direction, and communicate the suction chamber 12r and the cylinder chamber 11b. The first suction port 22 and the second suction port 23 have, for example, the same lengths of refrigerant gas paths from the suction port 11a to the first suction port 22 and the second suction port 23 via the suction chamber 12r. It is arranged at the position. The suction chamber 12r, the first suction port 22, and the second suction port 23 are suction passages that allow the suction port 11a to communicate with a compression chamber described later.

  The partition wall 12b of the front housing 12 is located on the front side of the cylinder chamber forming portion 12a and is provided integrally with the cylinder chamber forming portion 12a. The partition wall 12b forms an inner surface 11c on one side in the axial direction of the cylinder chamber 11b. The partition wall 12b is provided with a first shaft hole 12h into which the shaft 15 is inserted. Although details will be described later, a first communication passage 24 and a second communication passage 25 are also provided in the partition wall 12b.

(Rear housing 13, side plate 14)
The rear housing 13 accommodates the cylinder chamber forming portion 12 a and the side plate 14 of the front housing 12. A discharge region 35 is formed between the rear housing 13 and the side plate 14. The side plate 14 partitions the cylinder chamber 11b and the discharge region 35.

  The rear housing 13 is formed with a suction port 11a and a discharge port 11e. The suction port 11a allows the suction chamber 12r to communicate with the outside, and the discharge port 11e allows the discharge region 35 to communicate with the outside. The suction chamber 12r, the suction port 11a, and the cylinder chamber 11b are disposed at overlapping positions in the radial direction. The cylinder chamber 11b (compression chamber 21) and the suction chamber 12r during the suction stroke communicate with each other via the first suction port 22 and the second suction port 23 (FIG. 2), respectively.

  The side plate 14 (second wall portion) is joined to the rear end surface of the cylinder chamber forming portion 12a of the front housing 12. The side plate 14 forms an inner surface 11d on the other side in the axial direction of the cylinder chamber 11b. The side plate 14 is provided with a second shaft hole 14h into which the shaft 15 is inserted.

(Shaft 15, shaft seal device 17)
The shaft 15 is disposed so as to penetrate the cylinder chamber 11 b in the housing 11, and is provided to be rotatable around the rotation axis 16. In the present embodiment, the shaft is formed by the inner peripheral surface of the first shaft hole 12h provided in the front housing 12 (partition wall 12b) and the inner peripheral surface of the second shaft hole 14h provided in the side plate 14. 15 is rotatably supported.

  The shaft seal device 17 is provided between the first shaft hole 12 h provided in the housing 11 (partition wall 12 b) and the outer peripheral surface of the shaft 15. The shaft seal device 17 prevents the refrigerant gas from leaking along the outer peripheral surface of the shaft 15.

  As described above, the first communication passage 24 and the second communication passage 25 are provided through the partition wall 12 b of the front housing 12. The first communication passage 24 and the second communication passage 25 are the suction chamber 12r and the first shaft hole 12h (specifically, the portion 12k located behind the shaft seal device 17 in the first shaft hole 12h). To communicate with. The refrigerant from the suction port 11a is supplied to the shaft seal device 17 through the suction chamber 12r, the first communication passage 24, and the second communication passage 25 (details will be described later).

(Rotor 18, vane 19)
The rotor 18 is disposed in the cylinder chamber 11b. The rotor 18 is fixed to the shaft 15 and can rotate integrally with the shaft 15. A plurality of grooves 18 a (FIGS. 2 and 3) are formed on the outer peripheral surface of the rotor 18. The vane 19 is provided inside each of the plurality of grooves 18a. Lubricating oil is supplied to each groove 18a.

  The tip of the vane 19 comes into contact with the inner peripheral surface of the cylinder chamber 11 b by the rotation of the rotor 18. A compression chamber 21 is formed in the cylinder chamber 11b. The compression chamber 21 is partitioned by the outer peripheral surface of the rotor 18, the inner wall of the cylinder chamber forming portion 12a, two adjacent vanes 19, a partition wall 12b (inner surface 11c), and a side plate 14 (inner surface 11d). .

  As shown in FIGS. 1 and 3, a discharge space 30 is formed between the cylinder chamber forming portion 12 a of the front housing 12 and the rear housing 13. The discharge space 30 is located closer to the side plate 14 than the suction chamber 12r (FIG. 1). The suction chamber 12r and the discharge space 30 are located between the cylinder chamber forming portion 12a and the rear housing 13 in the radial direction, and are arranged side by side in the axial direction.

  The cylinder chamber forming portion 12a is provided with a discharge port 31 that is opened and closed by a discharge valve 32 (FIG. 3). The compression chamber 21 and the discharge space 30 in the discharge stroke communicate with each other through the discharge port 31. The refrigerant gas compressed in the compression chamber 21 is pushed out of the discharge valve 32 and discharged into the discharge space 30 through the discharge port 31.

  A discharge region 35 is defined by the side plate 14 on the rear side of the rear housing 13 (FIG. 1). An oil separator 36 is provided in the discharge region 35. The oil separator 36 includes a case 36a, an oil separation cylinder 36b, and an oil passage 36c. In the side plate 14 and the case 36a, a communication passage 37 (FIGS. 1 and 3) that connects the discharge space 30 and the inside of the case 36a is formed. The side plate 14 is formed with an oil supply passage 14d for guiding the lubricating oil stored in the discharge region 35 to the groove 18a.

(First communication passage 24, second communication passage 25)
FIG. 4 is a perspective view schematically showing the suction port 11a, the suction chamber 12r, the first communication passage 24, the second communication passage 25, and the first shaft hole 12h. FIG. 5 is a perspective view showing how the refrigerant flows.

  With reference to FIGS. 1, 2, and 4, as described above, the cylinder chamber forming portion 12 a of the front housing 12 is provided with the first suction port 22 and the second suction port 23. The first suction port 22 and the second suction port 23 are provided at positions separated from each other in the circumferential direction (FIGS. 2 and 4), and communicate the suction chamber 12r and the cylinder chamber 11b. When the shaft 15 is driven, the rotor 18 rotates integrally with the shaft 15, and the volume of the compression chamber 21 is changed by the operation of the rotor 18 and the vane 19. The refrigerant is sucked into the suction chamber 12r from the suction port 11a, branched in two directions along the outer peripheral surface of the cylinder chamber forming portion 12a, and sucked into the compression chamber 21 through the first suction port 22 and the second suction port 23. Is done. The first suction port 22 opens in the middle of the suction passage (suction chamber 12r), and the second suction port 23 also opens in the middle of the suction passage (suction chamber 12r) (arrows DR and DR1 in FIG. 5). , DR2).

  On the other hand, the first communication passage 24 and the second communication passage 25 provided in the partition wall 12b of the front housing 12 have a suction chamber 12r and a first shaft hole 12h (specifically, the shaft of the first shaft hole 12h is the shaft). The part 12k) located behind the sealing device 17 is communicated. A part of the refrigerant from the suction port 11a is supplied to the shaft seal device 17 through the suction chamber 12r, the first communication passage 24, the second communication passage 25, and the first shaft hole 12h (part 12k) (in FIG. 5). (See arrows AR1 and AR2). The first communication passage 24 opens on the side closer to the suction port 11a than the first suction port 22, and the second communication passage 25 opens on the side farther from the suction port 11a than the second suction port 23. Yes. Hereinafter, these positional relationships will be described in detail.

(First plane 22s, second plane 23s)
Referring to FIG. 2, here, it is assumed that the first plane 22 s and the second plane 23 s are drawn. The first plane 22s is a shape of a two-dimensional plane extending from the position of the rotation axis 16 of the shaft 15 so as to include the center position 22p in the circumferential direction of the first suction port 22 from the position of the rotation axis 16. (In FIG. 2, the first plane 22s is drawn using a one-dot chain line). The central position 22p in the circumferential direction of the first suction port 22 is the outside of the first suction port 22 in the radial direction when the first suction port 22 is viewed in a cross section perpendicular to the rotational axis 16. It is a part located in the center of the opening part located in the circumferential direction.

  On the other hand, the second plane 23 s is a two-dimensional plane extending from the position of the rotation axis 16 so as to include the center position 23 p in the circumferential direction of the second suction port 23, starting from the position of the rotation axis 16 of the shaft 15. (In FIG. 2, the second plane 23s is drawn using a two-dot chain line). The central position 23p in the circumferential direction of the second suction port 23 refers to the outer side in the radial direction of the second suction port 23 when the second suction port 23 is viewed in a cross section perpendicular to the rotational axis 16. It is a part located in the center of the opening part located in the circumferential direction.

  It is assumed that the space in the suction chamber 12r is divided into two spaces, a space 12r1 and a space 12r2. The space 12r1 is a space located on the side closer to the suction port 11a when viewed from the first plane 22s and the second plane 23s in the suction chamber 12r. The space 12r2 is a space located on the far side from the suction port 11a when viewed from the first plane 22s and the second plane 23s in the suction chamber 12r.

  Referring to FIGS. 2 and 4, in the present embodiment, end 24a opposite to first shaft hole 12h of first communication passage 24 is located so as to open to space 12r1, An end 25a of the second communication passage 25 opposite to the first shaft hole 12h is positioned so as to open to the space 12r2.

  The end portion 24a of the first communication passage 24 is open to the space 12r1 when the end portion 24a of the first communication passage 24 is viewed in a cross section perpendicular to the rotation axis 16. This means that more than half of the opening (opening area) of 24a is located in the space 12r1. In other words, when the end portion 24a of the first communication passage 24 is viewed in a cross section orthogonal to the rotation axis 16, more than half of the opening (opening area) of the end portion 24a is present. It means that it is located closer to the suction port 11a than the first plane 22s and the second plane 23s.

  The end 25a of the second communication passage 25 is open to the space 12r2 when the end 25a of the second communication passage 25 is viewed in a cross section perpendicular to the rotational axis 16. This means that more than half of the opening (opening area) of 25a is located in the space 12r2. In other words, when the end portion 25a of the second communication passage 25 is viewed in a cross section perpendicular to the rotation axis 16, more than half of the opening (opening area) of the end portion 25a is present. This means that the first plane 22s and the second plane 23s are located farther from the suction port 11a.

(Function and effect)
In the vane type compressor 10 (FIG. 1) of the present embodiment, the suction chamber 12r, the suction port 11a, and the cylinder chamber 11b are arranged at positions that overlap in the radial direction. The size can be reduced in the axial direction.

  Since the partition wall 12b of the front housing 12 is provided integrally with the cylinder chamber forming portion 12a, the number of parts can be reduced as compared with the case where the partition wall 12b and the cylinder chamber forming portion 12a are configured as separate components.

  In the vane type compressor 10 of the present embodiment, the place where the suction chamber 12r and the shaft seal device 17 are provided by the first communication passage 24 and the second communication passage 25 (specifically, the first shaft Of the hole 12h, a portion 12k) located behind the shaft seal device 17 is communicated. A part of the refrigerant in the suction chamber 12 r is supplied to the shaft seal device 17 through the first communication passage 24 and the second communication passage 25. The shaft seal device 17 can be cooled, and lubrication of the sliding portion between the shaft 15 and the shaft seal device 17 can be improved.

  As described above, the end 24a of the first communication passage 24 is located so as to open to the space 12r1, and the end 25a of the second communication passage 25 is located so as to open to the space 12r2. Referring to FIG. 5, the flow of the refrigerant flowing in space 12r1 is faster than the flow of the refrigerant flowing in space 12r2. In other words, the refrigerant flow between the suction port 11a and the first suction port 22 and the refrigerant flow between the suction port 11a and the second suction port 23 are in the space 12r2 by the amount close to the suction port 11a. It is faster than the flow of refrigerant.

  Therefore, the pressure in the space 12r1 is lower than the pressure in the space 12r2. The end 24a of the first communication passage 24 is located so as to open to the space 12r1, and the end 25a of the second communication passage 25 is located so as to open to the space 12r2. A differential pressure tends to be generated between the end 24 a of the first communication passage 24 and the end 25 a of the second communication passage 25.

  The pressure at the end 24a of the first communication passage 24 is relatively low, and the pressure at the end 25a of the second communication passage 25 tends to be relatively high. The refrigerant easily flows from the end portion 25 a of the second communication passage 25 to the end portion 24 a of the first communication passage 24. That is, the refrigerant in the suction chamber 12r can be more easily flowed toward the shaft seal device 17.

  Preferably, the end 25a of the second communication passage 25 opposite to the first shaft hole 12h is higher than the end 24a of the first communication passage 24 opposite to the first shaft hole 12h in the direction of gravity. It is good to be provided in the position. It becomes possible to make the refrigerant in the suction chamber 12r more easily flow toward the shaft seal device 17. Alternatively, in order to obtain the same effect, it is desirable that the average flow path cross-sectional area of the first communication path 24 and the average flow path cross-sectional area of the second communication path 25 are equal, and the average flow path cut-off of the first communication path 24 is The area may be not less than 0.9 times and not more than 1.1 times the average flow path cross-sectional area of the second communication passage 25. If there is a difference between the diameters of the first communication path 24 and the second communication path 25, the smaller diameter side becomes a throttle and pressure loss is likely to occur, but the diameters of the first communication path 24 and the second communication path 25 (average) If the channel cross-sectional areas are substantially equal, it is possible to suppress the occurrence of pressure loss.

  The suction chamber 12r (FIG. 2) of the present embodiment has an annular shape surrounding the cylinder chamber forming portion 12a. Compared to the case where the suction chamber 12r does not have an annular shape surrounding the cylinder chamber forming portion 12a, the vane compressor 10 can secure the volume of the suction chamber 12r as much as possible. If the suction chamber 12r and the cylinder chamber 11b can be communicated with each other by the first suction port 22 (FIG. 2) and the second suction port 23 (FIG. 2), the suction chamber 12r is not necessarily formed as a cylinder chamber. It does not have to have an annular shape surrounding the periphery of the portion 12a. Referring to FIG. 5, for example, space 12r2 may be divided in the circumferential direction in region 12r3.

  FIG. 6 is a perspective view showing another configuration of the first communication passage 24 and the second communication passage 25. The first communication passage 24 includes a plurality of through holes 241 and 242. The second communication passage 25 is also composed of a plurality of through holes 251 and 252. That is, at least one of the first communication passage 24 and the second communication passage 25 may be configured by a plurality of through holes. Also with this configuration, the same operations and effects as described above can be obtained.

  As shown in FIG. 6, the first communication passage 24 includes a through hole 241 (first through hole) and a through hole 242 (second through hole) having an average channel cross-sectional area smaller than the through hole 241. In this case, it is preferable that the through hole 241 is opened on the side closer to the second suction port 23 than the through hole 242. The arrow in FIG. 6 has shown the direction through which a refrigerant | coolant flows. According to this configuration, the refrigerant gas heated by passing through the shaft seal device 17 passes through the large-diameter through hole 241 and then recirculates in the suction chamber 12r from the second suction port 23. It becomes easy to be inhaled into the compression chamber. That is, as indicated by an arrow AR3 in FIG. 6, since the large-diameter through hole 241 is near the second suction port 23, the flow from the through hole 241 is strong, and the refrigerant gas enters the second suction port 23. It becomes easy to enter, and it becomes possible to suppress that the heated refrigerant gas is used for cooling the shaft seal device 17 again.

  Although the embodiment has been described above, the above disclosure is illustrative in all respects and is not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  10 Vane compressor, 11 Housing, 11a Suction port, 11b Cylinder chamber, 11c, 11d Inner surface, 11e Discharge port, 12 Front housing, 12a Cylinder chamber forming portion, 12b Partition wall, 12f Recessed portion, 12h First shaft hole, 12k Part, 12r1, 12r2 space, 12r suction chamber, 12r3 region, 13 rear housing, 14 side plate, 14h second shaft hole, 15 shaft, 15d oil supply passage, 16 rotation shaft center, 17 shaft seal device, 18 rotor, 18a Groove, 19 vane, 21 compression chamber, 22 first suction port, 22p, 23p center position, 22s first plane, 23 second suction port, 23s second plane, 24 first communication passage, 24a, 25a end, 25 Second communication passage, 30 discharge space, 31 discharge port, 32 discharge valve, 35 discharge Area, 36 Oil separator, 36a Case, 36b Oil separation cylinder, 36c Oil passage, 37 Communication passage, 241, 242, 251, 252 Through hole, AR1, AR2, AR3, DR, DR1, DR2 Arrows.

Claims (5)

A housing having a suction port and having a cylinder chamber formed inside;
A shaft disposed in the housing and provided rotatably around a rotation axis;
A shaft seal device provided between the housing and the shaft;
A rotor having a plurality of grooves and integrally rotating with the shaft in the cylinder chamber;
A vane provided inside each of the plurality of grooves,
The housing is
A cylinder chamber forming portion having a cylindrical shape and forming the cylinder chamber inside;
A first wall having a first shaft hole into which the shaft is inserted, and forming an inner surface on one side in the axial direction of the cylinder chamber;
A second wall having a second shaft hole into which the shaft is inserted, and forming an inner surface on the other side in the axial direction of the cylinder chamber,
In the cylinder chamber, a compression chamber is defined by the outer peripheral surface of the rotor, the vane, the first wall portion, and the second wall portion,
A suction passage communicating the suction port and the compression chamber is provided;
In the cylinder chamber forming portion, a first suction port and a second suction port that communicate the suction passage and the cylinder chamber are provided at positions separated from each other in the circumferential direction,
The shaft seal device is provided between the first shaft hole and the shaft,
A first communication passage and a second communication passage are provided in the first wall portion so as to allow the suction passage and the first shaft hole to communicate with each other and supply refrigerant from the suction port to the shaft seal device. And
At least one of the first suction port and the second suction port opens in the middle of the suction passage,
The first communication passage is positioned so as to open closer to the suction port than the second suction port;
The second communication passage is located so as to open on a side farther from the suction port than the first suction port.
Vane type compressor. The suction passage includes a suction chamber having an annular shape surrounding the cylinder chamber forming portion.
The vane type compressor according to claim 1. The end of the second communication passage on the side opposite to the first shaft hole is provided at a position higher than the end of the first communication passage on the side opposite to the first shaft hole in the gravitational direction. Yes,
The vane type compressor according to claim 1 or 2. At least one of the first communication path and the second communication path includes a plurality of through holes.
The vane type compressor according to any one of claims 1 to 3. The first communication passage is composed of a first through hole and a second through hole having an average channel cross-sectional area smaller than the first through hole,
The first through hole is open on the side closer to the second suction port than the second through hole,
The vane type compressor according to any one of claims 1 to 3.