JP2021105345A - Scroll compressor - Google Patents

Abstract

To provide a scroll compressor capable of preventing falling off of a member constituting a rotation prevention mechanism for an orbiting scroll at the time of assembling and ensuring a degree of freedom in design on the back side of an end plate of the orbiting scroll.SOLUTION: A rotation prevention mechanism 35 comprises protrusions 36 protruding from an end plate 21a of a fixed scroll 21 toward an end plate 22a side of an orbiting scroll 22, and protrusions 37 protruding from the end plate 22a of the orbiting scroll 22 toward the end plate 21a side of the fixed scroll 21. The plurality of protrusions 36 are disposed along the circumferential direction of the fixed scroll 21, and the plurality of protrusions 37 are disposed along the circumferential direction of the orbiting scroll 22. While the orbiting scroll 21 is orbited, a side peripheral surface of any one or two protrusions 37 among the plurality of protrusions 37 abuts on a side peripheral surface of the corresponding protrusion 36 among the plurality of protrusions 36 so that rotation of the orbiting scroll 22 is prevented.SELECTED DRAWING: Figure 1

Description

The present invention relates to a scroll compressor in which a compression chamber is formed by combining a fixed scroll and a swivel scroll, and more particularly to a configuration of a rotation prevention mechanism for preventing the swivel scroll from rotating.

The scroll compressor of Patent Document 1 has a fixed scroll and a swivel scroll as compression mechanisms, and the fixed scroll and the swivel scroll are a disk-shaped end plate and a spiral wrap erected from the end plate, respectively. It is configured to have and. By combining the lap of the fixed scroll and the lap of the swivel scroll, the swivel scroll is swiveled with respect to the fixed scroll in the fixed state, and the compression space formed between the laps of both scrolls is shifted from the outer peripheral side to the inner peripheral side. By reducing the volume, the refrigerant is compressed.

In such a scroll compressor, a rotation force may be generated in the swivel scroll due to the compression reaction force during the swivel of the swivel scroll. When a rotating force is generated in the swivel scroll, a gap is generated between the swivel scroll and the fixed scroll, resulting in poor sealing of the compression chamber. Therefore, in the scroll compressor of Patent Document 1, a pin-ring type rotation prevention mechanism is used in order to prevent the rotation of the turning scroll. The pin-ring type rotation prevention mechanism of the scroll compressor of Patent Document 1 includes a pin fixed to the end plate of the motor accommodating housing facing the back surface of the end plate of the swivel scroll and projecting to the swivel scroll side, and a swivel scroll. The rotation prevention part consisting of the ring housed in the circular recess formed on the back side of the end plate of the swivel scroll is evenly arranged along the circumferential direction of the swivel scroll centering on the bearing recess formed in the center of the back surface of the swivel scroll. It has a structure that makes it possible.

In a general pin-ring type rotation prevention mechanism, the pin is press-fitted and fixed to a hole in the end plate of the motor accommodating housing. On the other hand, the ring housed in the swivel scroll is housed in the circular recess in a loosely fitted state so as not to press-fit and deform the swivel scroll.

International Publication No. 2018/003032

In the method of assembling the rotation prevention mechanism of the pin-ring type as described above, the pin rings the swivel scroll in which the ring is loosely fitted in the circular recess in the end plate in which the pin is already press-fitted and fixed. It is common to take the procedure of placing from above so as to engage with. Since the circular recess is opened below the swivel scroll during assembly, the ring may fall off from the circular recess of the swivel scroll due to gravity.

In addition, if a pin-ring type rotation prevention mechanism is arranged on the back side of the swivel scroll, it interferes with the seal ring for forming the back pressure chamber on the back side of the end plate of the swivel scroll, resulting in back pressure. It becomes an obstacle to the adoption of the method.

The present invention has been made to solve the above problems, and even if the member that constitutes the rotation prevention mechanism of the turning scroll is prevented from falling off at the time of assembly and has the rotation prevention mechanism of the turning scroll. It is an object of the present invention to provide a scroll compressor capable of ensuring a degree of freedom in design on the back side of the end plate of a swivel scroll.

In order to achieve the above object, the scroll compressor according to the present invention includes a housing, a fixed scroll housed in the housing and having a disk-shaped end plate and a spiral wrap erected from the end plate. It is provided with a compression mechanism in which a disk-shaped end plate and a swivel scroll having a spiral wrap erected from the end plate are combined with each other to form a compression chamber, and a drive shaft for swiveling the swivel scroll. The scroll compressor is characterized in that a rotation prevention mechanism for preventing the rotation of the turning scroll is provided on the side where the lap of the fixed scroll and the lap of the turning scroll face each other.

With such a configuration of the rotation prevention mechanism, there is no possibility that the ring as the rotation prevention mechanism will fall off when the swivel scroll is assembled, and it is not necessary to take measures to prevent the fall.

Further, since the rotation prevention mechanism of the swivel scroll is not provided on the back side of the end plate of the swivel scroll, the degree of freedom of design on the back side of the end plate of the swivel scroll can be ensured. Therefore, a back pressure chamber capable of applying back pressure to the swivel scroll can be provided on the back side of the end plate of the swivel scroll.

Preferably, the rotation prevention mechanism has a first protrusion protruding toward the end plate side of the swivel scroll on the end plate of the fixed scroll, and the end plate of the swivel scroll on the end plate side of the fixed scroll. It consists of a second protrusion that protrudes toward it. A plurality of the first protrusions are arranged along the circumferential direction of the fixed scroll, and a plurality of the second protrusions are arranged along the circumferential direction of the swivel scroll. While swirling, the lateral peripheral surface of any one or two of the second protrusions of the plurality of second protrusions is the corresponding first of the plurality of first protrusions. It is preferable to prevent the swivel scroll from rotating by contacting the side peripheral surface of the protrusion (claim 2). The plurality of first protrusions and the plurality of second protrusions may be, for example, four or six first protrusions and second protrusions, respectively.

Further, the first protrusion and the second protrusion may be pins that are separate from the end plate of the scroll (claim 3).

As described above, according to the present invention, as an assembly work of the rotation prevention mechanism, a swivel scroll in which a ring is attached to a circular recess on the back side of the end plate is provided with the opening of the circular recess facing downward. It is not necessary to engage the housing member with a pin whose tip is directed upward. Therefore, unlike the pin-ring method in which the ring may fall off, it is possible to prevent the inconvenience that the components of the rotation prevention mechanism fall off during assembly.

Further, according to the present invention, since the rotation prevention mechanism of the swivel scroll is not provided on the back side of the end plate of the swivel scroll, the degree of freedom in design on the back side of the end plate of the swivel scroll can be ensured. Therefore, a back pressure chamber capable of applying back pressure to the swivel scroll can be provided on the back side of the end plate of the swivel scroll.

It is sectional drawing which shows an example of embodiment of the rotation prevention mechanism of a turning scroll about the scroll compressor to which this invention was applied. It is an enlarged cross-sectional view which mainly shows the part of the compression mechanism of the scroll compressor. It is explanatory drawing which showed the aspect which prevents the rotation of a turning scroll by the rotation prevention mechanism of this invention. It is sectional drawing which shows the other example of embodiment of the rotation prevention mechanism of a turning scroll about the scroll compressor to which this invention is applied.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 3 show an example of an embodiment of a scroll compressor (hereinafter referred to as a compressor) 1 to which the present invention is applied. In FIG. 1, the left side in the figure is the front side of the compressor 1, and the right side in the figure is the rear side of the compressor 1.

In this embodiment, the compressor 1 is an electric type used in a refrigerating cycle using carbon dioxide (CO2) as a refrigerant, for example, a refrigerating cycle of a vehicle air conditioner, and has a compression mechanism 2 for compressing the refrigerant and compression. It has an electric motor 3 for driving the mechanism 2, a drive shaft 4 for transmitting the power of the electric motor 3 to the compressor 2, an inverter device for controlling the electric motor 3, and a housing 5 made of an aluminum alloy. In this embodiment, the housing 5 is composed of two housing components, a front housing 6 and a rear housing 12.

The front housing 6 has a bottomed tubular shape in which the front side of the compressor 1 is closed by the bottom wall 61 and the rear side of the compressor 1 is open. A tubular accommodating space 7 is provided for accommodating the block member 62 that separates the 3 in the front housing 6. Further, the front housing 6 is provided with an inverter accommodating space 8 for accommodating an inverter device (not shown) for controlling the electric motor 3 on the front side of the compressor 1 with a bottom wall 61 separated from the tubular accommodating space 7. There is. The inverter accommodating space 8 opens on the side opposite to the tubular accommodating space 7 (front side of the compressor 1), and this opening is closed by the lid 64. Further, a suction port 9 for taking in the refrigerant into the compressor 1 from the external refrigeration cycle is provided on the side surface of the tubular portion of the front housing 6.

The block member 62 includes an intermediate bulging portion 62a that bulges toward the motor 3 side, and a flange portion 62b that extends radially outward from the axial rear end portion thereof. The flange portion 62b is abutted and supported by a block support surface 6a formed on the inner peripheral surface of the front housing 6. The block support surface 6a is formed by providing a step portion on the inner peripheral wall so that the inner diameter is smaller than the opening portion of the front housing 6.

The drive shaft 4 is rotatably supported between the intermediate bulging portion 62a of the block member 62 and the central portion of the bottom wall 61 via bearings 10 and 11. The drive shaft 4 has an eccentric shaft 4a provided at the rear end portion in the axial direction and eccentric with respect to the axial center of the drive shaft 4, and the eccentric shaft 4a is described below via the bush 23 and the bearing 24. It is connected to the swivel scroll 22 of the compression mechanism 2.

The block member 62 has a through hole 63 formed in the center in which the diameter gradually increases from the front side to the rear side of the compressor 1. The through hole 63 has a bearing accommodating portion 63a for accommodating the bearing 10 and a weight accommodating portion 63b having a diameter larger than that of the bearing accommodating portion 63a, in this order from the side farthest from the swivel scroll 22. The weight accommodating portion 63b is formed so as to be integrated with the bush 23 and accommodate a balance weight 25 that rotates with the rotation of the drive shaft 4.

The compression mechanism 2 is housed on the rear side of the compressor 1 with respect to the block member 62 of the tubular storage space 7, and is a scroll type having a fixed scroll 21 and a swivel scroll 22 arranged to face the fixed scroll 21. It has become.

The fixed scroll 21 includes a disk-shaped end plate 21a, a cylindrical outer peripheral wall 21b provided over the entire circumference along the outer edge of the end plate 21a, and erected toward the front side of the compressor 1. It is configured to have a spiral wrap 21c erected from the end plate 21a toward the front side of the compressor 1 inside the outer peripheral wall 21b. A discharge port 21d, which is a through hole, is formed substantially in the center of the end plate 21a, and a discharge chamber of the rear housing 12 described below is formed via a discharge valve 26 provided on the rear end surface of the compressor 1 of the end plate 21a. It is discharged to 13. An O-ring 19 is provided between the fixed scroll 21 and the rear housing 12 to seal the leakage of the refrigerant in the discharge chamber 13 to the low pressure side.

The swivel scroll 22 includes a disk-shaped end plate 22a and a spiral wrap 22b erected from the end plate 22a toward the rear side of the compressor, and is formed in the center of the back surface of the end plate 22a. An eccentric shaft 4a provided at the rear end of the drive shaft 4 and eccentric with respect to the axis of the drive shaft 4 is connected to the recess 22c formed in the above via the bush 23 and the bearing 24 as described above to drive the drive shaft 4. It is supported so that it can swing around the axis of the shaft 4.

The fixed scroll 21 and the swivel scroll 22 are combined with each other so that the lap 21c and the lap 22b are appropriately meshed with each other so that the tips of the laps 21c and 22b are in contact with the end plates 21a and 22a of the scrolls 21 and 22 facing each other. Be done. As a result, the compression chamber 28 is defined in the space surrounded by the end plates 21a and the lap 21c of the fixed scroll 21 and the end plates 22a and the lap 22b of the swivel scroll 22. Further, a suction chamber 29 for sucking the refrigerant into the compression chamber 28 is configured between the outer peripheral wall 21b of the fixed scroll 21 and the outermost peripheral portion of the lap 22b of the swivel scroll 22.

The electric motor 3 is housed on the front side (motor chamber) of the compressor 1 with respect to the block member 62 of the tubular housing space 7, and is driven inside the stator 31 fixed to the inner surface of the front housing 6 and the stator 31. It is composed of a rotor 32 that is fixed so as to rotate integrally with the shaft 4. The stator 31 includes a cylindrical iron core 31a and a coil 31b wound around the iron core 31a. The rotor 32 is adapted to rotate by the rotating magnetic field formed by the stator 31.

The rear housing 12 is provided with a discharge chamber 13, an oil separator 14, and an oil storage chamber 15, and a discharge port 16 for discharging the refrigerant from the discharge chamber 13 to the external refrigeration cycle is formed on the side surface thereof. .. The oil separator 14 is a centrifugal type in this embodiment, and has an oil separation chamber 14a communicating with an introduction passage 17 located above the discharge chamber 13 and a cylindrical oil housed in the oil separation chamber 14a. It is provided with a separation pipe 14b. The space inside the oil separation pipe 14b communicates with the discharge port 16, and the oil separation chamber 14a communicates with the oil storage chamber 15 via the delivery passage 18.

With such a configuration of the compressor 1, when the drive shaft 4 is rotationally driven by the electric motor 3, the swivel scroll 22 swivels around the axis of the fixed scroll 21 via the eccentric shaft 4a. As a result, the refrigerant sucked into the front housing 6 from the suction port 9 is introduced into the compression chamber 28 via the suction chamber 29 and compressed.

More specifically, FIG. 3A shows the phase at which compression starts, and the center P2 of the end plate 22a of the swivel scroll 22 is the center P1 of the end plate 21a of the fixed scroll 21 with respect to the hour hand of the clock. It is in a position equivalent to 7:30. At this time, the outer compression chambers 28o and 28o have just started to be closed by the laps 21c and 22b, and have the largest volume. Inside the outer compression chamber 28o, inner compression chambers 28i and 28i in which compression has advanced by 360 degrees are defined.
FIG. 3B shows a phase in which compression is advanced by 90 degrees, and the center P2 of the end plate 22a of the swivel scroll 22 is 4 at the position of the short hand of the clock with respect to the center P1 of the end plate 21a of the fixed scroll 21. It is in a position equivalent to half an hour. The volumes of the outer compression chambers 28o and 28o are reduced due to the compression progressing by 90 degrees. The inner compression chambers 28i and 28i are in a state where the two chambers are united and the refrigerant can be discharged to the discharge chamber 13 in communication with the discharge port 21d.
FIG. 3C shows a phase in which compression is advanced by 180 degrees, and the center P2 of the end plate 22a of the swivel scroll 22 is at the position of the hour hand of the clock with respect to the center P1 of the end plate 21a of the fixed scroll 21. It is in a position equivalent to 1:30. The volume of the outer compression chamber 28o is further reduced, and the volume of the inner compression chamber 28i is further reduced.
FIG. 3D shows a phase in which compression is advanced by 270 degrees, and the center P2 of the end plate 22a of the swivel scroll 22 is at the position of the hour hand of the clock with respect to the center P1 of the end plate 21a of the fixed scroll 21. It is in a position equivalent to 10:30. The volume of the outer compression chamber 28o is further reduced, and the volume of the inner compression chamber 28i is further reduced.

The refrigerant containing the oil compressed in the compression chamber 28 is discharged from the discharge port 21d of the fixed scroll 21 to the discharge chamber 13, the oil is separated and removed by the oil separator 14, and the external refrigeration cycle is performed from the discharge port 16. Is discharged to. The separated oil is sent to the oil storage chamber 15.

In this embodiment, the compressor 1 serves as a rotation prevention mechanism 35 for the swivel scroll 22 by means that the end plate 21a of the fixed scroll 21 has four protrusions 36 protruding toward the end plate 22a side of the swivel scroll 22 and a swivel scroll. The end plate 22a of 22 has four protrusions 37 protruding toward the end plate 21a side of the fixed scroll 21. That is, the rotation prevention mechanism 35 of the present invention is provided on the side where the lap 21c of the fixed scroll 21 and the lap 22b of the turning scroll 22 face each other.

Each protrusion 36 (first protrusion) provided on the fixed scroll 21 is a columnar pin separate from the fixed scroll 21, and is press-fitted into a through hole 21e penetrating the end plate 21a in the thickness direction. Therefore, it is erected in the direction perpendicular to the surface of the end plate 21a. Along with this, the protrusion 36 can be provided on the fixed scroll 21 by combining the fixed scroll 21 and the swivel scroll 22 and then press-fitting the fixed scroll 21 into the through hole 21e from the back surface side of the end plate 21a. Further, the protrusion dimension of these protrusions 36 from the end plate 21a is such that the tip in the protrusion direction does not come into contact with the end plate 22a.

Then, as shown in FIG. 3, the four protrusions 36 are displaced at equal intervals along the circumferential direction of the end plate 21a (positions rotated by 90 degrees about the center P1 of the end plate 21a). It is provided in. Specifically, the four protrusions 36 are on the reference line L1 extending in the horizontal direction and the reference line L2 extending in the vertical direction on the drawing through the center P1 of the end plate 21a, and are equidistant from the center P1. It is arranged in the position of. Further, as shown in FIGS. 3A to 3D, even if the position of the lap 22b changes due to the rotation of the rotation scroll, the lap 22b and the protrusion 36 do not interfere with each other.

Each protrusion 37 (second protrusion) provided on the swivel scroll 22 is a columnar pin separate from the swivel scroll 22, and has a radius different from that of the protrusion 36 forming the columnar pin. It is the same, and is press-fitted into the bottomed mounting hole 22d of the end plate 22a opened on the end plate 21a side of the fixed scroll 21 to stand perpendicular to the surface of the end plate 22a. The protrusion dimension of these protrusions 37 from the end plate 22a is such that the tip in the protrusion direction does not come into contact with the end plate 21a.

The four protrusions 37 provided on the swivel scroll 22 are provided at positions corresponding to the four protrusions 36 provided on the fixed scroll 21, respectively, as shown in FIGS. 3A to 3D. By turning the swivel scroll 22, it is possible to swivel around each protrusion 36 in close proximity or in contact with each other.

Since the rotation force due to compression acts on the turning scroll, it tries to rotate around the bush 23 fitted to the eccentric shaft 4a. At this time, depending on the rotation phase of the swivel scroll, any one or two of the four protrusions 37 abut on the corresponding protrusion 36 to prevent the swivel scroll from rotating.

Specifically, in the phase of FIG. 3A, the protrusions 37b and 37c of the four protrusions 37 abut on the protrusions 36b and 36c of the four protrusions 36 to rotate the swivel scroll. Is blocked. The arrow directed to the protrusion 37 in the drawing indicates the force that the end plate 22a of the swivel scroll acts on the protrusion 37 due to the rotation force. In the phase of FIG. 3B, the protrusions 37a and 37b of the four protrusions 37 abut on the protrusions 36a and 36b of the four protrusions 36. In the phase of FIG. 3C, the protrusions 37a and 37d of the four protrusions 37 abut on the protrusions 36a and 36d of the four protrusions 36, and in the phase of FIG. 3D, 4 The protrusions 37b, 37c of the three protrusions 37 abut on the protrusions 36b, 36c of the four protrusions 36.

Further, although not shown, in the phase between each of the four phases shown in FIG. 3, any single protrusion 37a, 37b, 37c, 37d of the four protrusions 37 corresponds to the protrusion. It abuts on the protrusions 36a, 36b, 36c, 36d at the corresponding positions of the portion 36. Even in this case, the swivel scroll 22 is in a state of being supported at two points, one of the protrusions 36 (36a, 36b, 36c, 36d) and the bush 23 fitted to the eccentric shaft 4a.

As a result, according to the rotation prevention mechanism 35 of the present invention, even if the rotation scroll 22 rotates around the fixed scroll 21, the rotation of the rotation scroll 22 is prevented.

As described above, the rotation prevention mechanism 35 can be provided on the side where the lap 21c of the fixed scroll 21 and the lap 22b of the turning scroll 22 face each other. Therefore, in the present invention, the turning scroll 22 is a fixed scroll. It is also possible to provide a back pressure chamber forming mechanism 41 for using the back side of the end plate 22a of the swivel scroll 22 as a back pressure chamber in order to press it toward the 21 side.

Hereinafter, the back pressure chamber forming mechanism 41 will be described with reference to FIGS. 1 and 2. The back pressure chamber forming mechanism 41 includes an oil passage 42 having an orifice 43 provided on the fixed scroll 21, an oil passage 44 provided on the block member 62, and a seal ring 45. The oil passage 42 is provided on the outer peripheral wall 22b of the fixed scroll 21 and extends linearly along the axial direction of the discharge port 21d, one end of which opens into the oil storage chamber 15 and the other end of which faces the block member 62. It is open at the position where it is used. The orifice 43 is formed in the passage near the opening on the oil storage chamber 15 side of the oil passage 42. The oil passage 44 is provided in the flange portion 62b of the block member 62 so that one end opens at a position connected to the opening of the oil passage 42 and the other end opens in the weight accommodating portion 63b of the through hole 63. In addition, it has an L-shape that is bent in the middle. Then, by sealing the swivel scroll 22 and the block member 62 with the seal ring 45, a section capable of holding back pressure is formed on the back surface side of the swivel scroll 22.

As a result, as shown by the arrow in FIG. 2, the oil sent from the discharge chamber 13 to the oil storage chamber 15 flows into the oil passage 42 of the fixed scroll 21 while being depressurized by the orifice 43, and then the oil of the block member 62. Since it is sent to the above-mentioned compartment formed on the back side of the swivel scroll 22 through the passage 44, such a compartment becomes a back pressure chamber. Therefore, since the swivel scroll 22 is pushed toward the fixed scroll 21 by the back pressure from the back pressure chamber, it is possible to make the lap 22b of the swivel scroll 22 and the end plate 21a of the fixed scroll 21 better in contact with each other. Become. With the formation of the back pressure chamber in this way, a U ring (not shown) is provided between the drive shaft 4 and the block member 62, and the refrigerant leaks from the back pressure chamber to the motor chamber. You may limit the amount.

In FIG. 4, as another example of the embodiment of the present invention, a modified example of the rotation prevention mechanism 35 of the swivel scroll 22 of the present invention is shown. Hereinafter, a modified example of the rotation prevention mechanism 35 will be described with reference to FIG. However, with respect to the configuration similar to the above-described embodiment, in principle, the same reference numerals as those in FIGS. 1 and 2 are assigned and the description thereof is omitted, and the rotation prevention mechanism 35, which is a difference from the previous embodiment, is provided. explain.

The protrusions 38 and 39 constituting the rotation prevention mechanism 35 shown in FIG. 4 are not separate but integrated with the scrolls 21 and 22. The protrusion 38 has a shape that protrudes from the end plate 21c of the fixed scroll 21 toward the end plate 22a of the swivel scroll 22 while being integrated with the end plate 21c. The arrangement and number of the protrusions 38 formed are the same as the arrangement and number of the protrusions 36 provided on the fixed scroll 21 described above. Further, the protrusion 39 has a shape that protrudes from the end plate 22a of the swivel scroll 22 toward the end plate 21c of the fixed scroll 21 while being integrated with the end plate 22a. The arrangement and number of the protrusions 39 formed are the same as the arrangement and the number of the protrusions 37 provided on the swivel scroll 22 described above. That is, also in FIG. 4, the rotation prevention mechanism 35 of the present invention is provided on the side where the lap 21c of the fixed scroll 21 and the lap 22b of the turning scroll 22 face each other.

In this way, by integrally forming the protrusions 38 and 39 constituting the rotation prevention mechanism 35 with the scrolls 21 and 22, the rotation of the rotation scroll 22 can be prevented as in the rotation prevention mechanism 35 of the previous embodiment. On the other hand, with respect to the O-ring 19 for sealing the fixed scroll 21 and the rear housing 12, the outermost portion thereof can be on the outer peripheral side of the protrusion 38.

1 Compressor (scroll compressor)
2 Compression mechanism 21 Fixed scroll 21a End plate 21c Wrap 22 Swivel scroll 22a End plate 22b Wrap 28o Outer compression chamber 28i Inner compression chamber
4 Drive shaft 5 Housing 35 Rotation prevention mechanism 36 (36a, 36b, 36c, 36d) Protrusion (first protrusion)
37 (37a, 37b, 37c, 37d) Protrusion (second protrusion)
38 (38a, 38b, 38c, 38d) Protrusion (first protrusion)
39 (39a, 39b, 39c, 39d) Protrusion (second protrusion)

Claims (3)

With the housing
It has a fixed scroll housed in the housing and having a disk-shaped end plate and a spiral wrap erected from the end plate, and a disk-shaped end plate and a spiral wrap erected from the end plate. A compression mechanism that combines swirl scrolls with each other to form a compression chamber,
The drive shaft that swivels the swivel scroll and
In a scroll compressor equipped with
A scroll compressor characterized in that a rotation prevention mechanism for preventing rotation of the rotation scroll is provided on a side where the lap of the fixed scroll and the lap of the rotation scroll face each other. The rotation prevention mechanism has a first protrusion protruding toward the end plate side of the swivel scroll on the end plate of the fixed scroll, and a protrusion toward the end plate side of the fixed scroll on the end plate of the swivel scroll. It consists of a second protrusion
A plurality of the first protrusions are arranged along the circumferential direction of the fixed scroll, and a plurality of the second protrusions are arranged along the circumferential direction of the swivel scroll.
While the swivel scroll is swiveling, the side peripheral surface of any one or two of the second protrusions of the plurality of second protrusions corresponds to the plurality of first protrusions. The scroll compressor according to claim 1, wherein the scroll compressor is prevented from rotating by contacting the side peripheral surface of the first protrusion. The scroll compressor according to claim 2, wherein the first protrusion and the second protrusion are pins that are separate from the end plate of the scroll.

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