Scroll fluid machine

Abstract

A scroll fluid machine 1A comprises: an orbiting scroll 4 that includes a spiral-shaped orbiting wrap 42 and orbits around a rotation axis A51 defined in an eccentric shaft 5A; a housing 2 that faces the orbiting scroll 4; and a rotation-inhibiting mechanism 6A that allows an orbiting movement of the orbiting scroll 4 with respect to the housing 2 and prevents a rotation movement of the orbiting scroll 4 with respect to the housing 2. The rotation-inhibiting mechanism 6A includes a plurality of rotation-inhibiting units 6A1, 6A2, 6A3. Each of the plurality of rotation-inhibiting units 6A1, 6A2, 6A3 includes: a columnar magnet 62 that is provided on the orbiting scroll 4 and generates a first magnetic force; and an annular magnet 61 that is provided in the housing 2, is arranged with respect to the columnar magnet 62 having a gap therebetween, and generates a second magnetic force that interferes with the first magnetic force.

Description

Scroll fluid machinery

[0001] The present disclosure relates to a scroll fluid machine.

[0002] A scroll fluid machine compresses or expands gas by the relative rotation of a pair of scrolls each having a spiral wrap. The scroll fluid machine has several bearings to support the relative rotation of the scrolls.

[0003] For example, Patent Document 1 discloses a scroll-type fluid machine equipped with a magnetic bearing, and Patent Document 2 discloses a scroll-type compressor equipped with a so-called Oldham mechanism for defining the orbital motion of the scroll.

[0004] Patent No. 4994971 Patent No. 3865478

[0005] In the field of scroll fluid machinery, it is desirable to reduce the frequency of maintenance. The timing of maintenance is sometimes determined by the lifespan of the components that make up the scroll fluid machinery. Therefore, if the lifespan of the components that make up the scroll fluid machinery can be extended, the period until the next maintenance can be extended, thereby reducing the frequency of maintenance.

[0006] SUMMARY OF THE INVENTION The present disclosure aims to describe a scroll fluid machine with components that can have a long life.

[0007] A scroll fluid machine according to one embodiment of the present disclosure comprises a scroll member including a spiral wrap and revolving around a rotation axis defined by a shaft, a mating member facing the scroll member, and a rotation-inhibiting mechanism that allows the scroll member to rotate relative to the mating member and inhibits the scroll member from rotating relative to the mating member, the rotation-inhibiting mechanism having a plurality of rotation-inhibiting units, each of which includes a first magnetic force generating unit provided on the scroll member that generates a first magnetic force, and a second magnetic force generating unit provided on the mating member that is positioned via a gap relative to the first magnetic force generating unit and generates a second magnetic force that interferes with the first magnetic force.

[0008] This scroll fluid machine is equipped with a rotation-inhibiting mechanism. The rotation-inhibiting mechanism exerts an effect of inhibiting rotation of the scroll member by interference between the first magnetic force and the second magnetic force. In other words, the rotation-inhibiting mechanism can obtain an effect of inhibiting rotation of the scroll member by a configuration that eliminates physical contact. A configuration that eliminates physical contact does not lead to deterioration of components such as wear. Therefore, the rotation-inhibiting mechanism, which is configured without physical contact, can have a long life. Therefore, it is possible to provide a scroll fluid machine equipped with components that can have a long life.

[0009] In the above scroll fluid machine, the scroll member may have an eccentric axis defined therein that is parallel to the rotation axis and spaced a predetermined distance from the rotation axis, and the distance from the first rotation-inhibiting unit to the eccentric axis may be equal to the distance from the second rotation-inhibiting unit to the eccentric axis. With this configuration, the arrangement of the first rotation-inhibiting unit and the second rotation-inhibiting unit allows the rotation-inhibiting mechanism as a whole to balance the torque that encourages the rotation of the scroll member.

[0010] In the above scroll fluid machine, the scroll member may have an eccentric axis defined therein that is parallel to the rotation axis and spaced a predetermined distance from the rotation axis, and the distance from the rotation-inhibiting unit to the eccentric axis may be longer than the distance from the rotation axis to the eccentric axis. With this configuration, too, the arrangement of the first rotation-inhibiting unit and the second rotation-inhibiting unit allows the rotation-inhibiting mechanism as a whole to balance the torque that encourages the rotation of the scroll member.

[0011] In the above scroll fluid machine, the scroll member may have an eccentric axis defined therein that is parallel to the rotation axis and spaced a predetermined distance from the rotation axis, and the plurality of rotation-inhibiting units may be disposed at equal intervals around the eccentric axis of the scroll member. With this configuration, too, the arrangement of the first rotation-inhibiting unit and the second rotation-inhibiting unit allows the rotation-inhibiting mechanism as a whole to balance the torque that promotes the rotation of the scroll member.

[0012] The scroll fluid machine may further include a second scroll member that cooperates with the first scroll member to form a space for compressing or expanding the working fluid, the mating member being a housing that accommodates the first and second scroll members, the first magnetic force generating unit being provided on the first scroll member, and the second magnetic force generating unit being provided on the housing. With this configuration, it is possible to inhibit the rotation of the first scroll member relative to the housing.

[0013] In the above scroll fluid machine, the housing may accommodate the scroll member and the counter member, the counter member being a second scroll member that cooperates with the first scroll member to form a space for compressing or expanding the working fluid, the first magnetic force generating portion may be provided on the first scroll member, and the second magnetic force generating portion may be provided on the second scroll member. With this configuration, it is possible to inhibit the rotation of the second scroll member relative to the first scroll member.

[0014] In the scroll fluid machine, the first magnetic force generating unit may be one of a ring-shaped magnet and a cylindrical magnet having a diameter smaller than the inner diameter of the ring-shaped magnet, and the second magnetic force generating unit may be the other of the ring-shaped magnet and the cylindrical magnet. With this configuration, a configuration that inhibits the rotation of the scroll member can be realized with a simple configuration while eliminating physical contact.

[0015] In the scroll fluid machine, the first magnetic force generating unit may be one of a pair of flat plate-shaped magnets spaced apart from each other and a cylindrical magnet located between the pair of flat plate magnets, and the second magnetic force generating unit may be the other of the pair of flat plate magnets and the cylindrical magnet. This configuration also makes it possible to achieve a configuration that inhibits the rotation of the scroll member with a simple configuration while eliminating physical contact.

[0016] In the above scroll fluid machine, the first magnetic force generating portion is a first magnet embedded in the first scroll member, and the second magnetic force generating portion is a second magnet embedded in the opposing surface of a mating member that faces the main surface of the first scroll member in which the first magnet is embedded, and the first magnet does not have to overlap the second magnet when viewed from the direction of the rotation axis. This configuration also makes it possible to realize a configuration that inhibits the rotation of the scroll member with a simple configuration while eliminating physical contact.

[0017] In the above scroll fluid machine, the first magnetic force generating portion may be a first magnet embedded in the first scroll member, and the second magnetic force generating portion may be a second magnet embedded in a surface of a mating member that faces the main surface of the first scroll member in which the first magnet is embedded, and the first magnet may include a portion that overlaps with the second magnet when viewed from the direction of the rotation axis. This configuration also makes it possible to realize a configuration that inhibits the rotation of the scroll member with a simple configuration while eliminating physical contact.

[0018] In the above scroll fluid machine, the first scroll member may be rotatably mounted relative to the housing and orbit relative to the second scroll member, and the second scroll member may be fixed relative to the housing. With this configuration, a scroll fluid machine having an orbiting scroll and a fixed scroll can be obtained.

[0019] In the above scroll fluid machine, the first scroll member may be rotatably mounted to the housing and orbit relative to the second scroll member, and the second scroll member may be rotatably mounted to the housing and orbit relative to the first scroll member. With this configuration, a scroll fluid machine having a pair of orbiting scrolls can be obtained.

[0020] A scroll fluid machine according to another embodiment of the present disclosure includes: a first rotating scroll member including a first spiral wrap and rotating about a first rotation axis defined on a first rotating shaft; a second rotating scroll member including a second spiral wrap that cooperates with the first wrap to form a region for compressing or expanding gas and that rotates about a second rotation axis defined on the second rotating shaft and disposed eccentrically with respect to the first rotation axis; and a power transmission mechanism that transmits torque from one of the first rotating scroll member and the second rotating scroll member to the other while allowing for eccentricity of the first rotating scroll member and the second rotating scroll member. The power transmission mechanism has a plurality of power transmission units, each of which includes a first magnetic force generating portion provided on the first rotating scroll member and generating a first magnetic force, and a second magnetic force generating portion provided on the second rotating scroll member and disposed with a gap between them and the first magnetic force generating portion and generating a second magnetic force that interferes with the first magnetic force.

[0021] According to this scroll fluid machine, power can be transmitted from one of the first rotating scroll member and the second rotating scroll member to the other without contact.

[0022] According to the present disclosure, a scroll fluid machine is provided that includes components that can have a long life.

[0023] FIG. 1 is a cross-sectional view showing a scroll fluid machine of a first embodiment. FIG. 2(a) is a cross-sectional view showing a first state of a rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the first embodiment. FIG. 2(b) is a plan view showing the first state of the rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the first embodiment. FIG. 3(a) is a cross-sectional view showing a second state of the rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the first embodiment. FIG. 3(b) is a plan view showing the second state of the rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the first embodiment. FIG. 4(a) is a cross-sectional view showing a simplified configuration of a first modified example of the scroll fluid machine of the first embodiment. FIG. 4(b) is a cross-sectional view showing a simplified configuration of a second modified example of the scroll fluid machine of the first embodiment. FIG. 4(c) is a cross-sectional view showing a simplified configuration of a third modified example of the scroll fluid machine of the first embodiment. FIG. 5(a) is a cross-sectional view showing a simplified configuration of a fourth modified example of the scroll fluid machine of the first embodiment. FIG. 5( b) is a cross-sectional view showing a simplified configuration of a fifth modified example of the scroll fluid machine of the first embodiment. FIG. 5( c) is a cross-sectional view showing a simplified configuration of a sixth modified example of the scroll fluid machine of the first embodiment. FIG. 6( a) is a cross-sectional view showing a first state of a rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the second embodiment. FIG. 6( b) is a plan view showing a first state of the rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the second embodiment. FIG. 7( a) is a cross-sectional view showing a second state of the rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the second embodiment. FIG. 7( b) is a plan view showing a second state of the rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the second embodiment. FIG. 8( a) is a cross-sectional view showing a simplified configuration of a first modified example of the scroll fluid machine of the second embodiment. FIG. 8( b) is a cross-sectional view showing a simplified configuration of a second modified example of the scroll fluid machine of the second embodiment. FIG. 8( c) is a cross-sectional view showing a simplified configuration of a third modified example of the scroll fluid machine of the second embodiment. 9(a) and 9(b) are cross-sectional views each showing a simplified configuration of a fourth modified example of the scroll fluid machine of the second embodiment, and a fifth modified example of the scroll fluid machine of the second embodiment.FIG. 9( c) is a cross-sectional view showing a simplified configuration of a sixth modified example of the scroll fluid machine of the second embodiment. FIG. 10( a) is a cross-sectional view showing a first state of a rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the third embodiment. FIG. 10( b) is a plan view showing the first state of the rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the third embodiment. FIG. 11( a) is a cross-sectional view showing a second state of the rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the third embodiment. FIG. 11( b) is a plan view showing the second state of the rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the third embodiment. FIG. 12( a) is a cross-sectional view showing a simplified configuration of a first modified example of the scroll fluid machine of the third embodiment. FIG. 12( b) is a cross-sectional view showing a simplified configuration of a second modified example of the scroll fluid machine of the third embodiment. FIG. 12( c) is a cross-sectional view showing a simplified configuration of a third modified example of the scroll fluid machine of the third embodiment. FIG. 13( a) is a cross-sectional view showing a first state of a rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the fourth embodiment. FIG. 13( b) is a plan view showing a first state of the rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the fourth embodiment. FIG. 14( a) is a cross-sectional view showing a second state of the rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the fourth embodiment. FIG. 14( b) is a plan view showing a second state of the rotation-inhibiting mechanism, which is a main part of the scroll fluid machine of the fourth embodiment. FIG. 15( a) is a cross-sectional view showing a simplified configuration of a first modified example of the scroll fluid machine of the fourth embodiment. FIG. 15( b) is a cross-sectional view showing a simplified configuration of a second modified example of the scroll fluid machine of the fourth embodiment. FIG. 15( c) is a cross-sectional view showing a simplified configuration of a third modified example of the scroll fluid machine of the fourth embodiment. FIG. 16( a) is a cross-sectional view showing a simplified configuration of a fourth modified example of the scroll fluid machine of the fourth embodiment. Fig. 16(b) is a cross-sectional view showing in a simplified manner the configuration of a fifth modified example of the scroll fluid machine of the fourth embodiment. Fig. 16(c) is a cross-sectional view showing in a simplified manner the configuration of a sixth modified example of the scroll fluid machine of the fourth embodiment. Fig. 17(a) is a cross-sectional view showing in a simplified manner the configuration of the scroll fluid machine of the fifth embodiment. Fig. 17(b) is a cross-sectional view showing in a simplified manner the configuration of a first modified example of the scroll fluid machine of the fifth embodiment.18(a) and 18(b) are cross-sectional views showing a simplified configuration of a second modified example of the scroll fluid machine of the fifth embodiment, and a simplified configuration of a third modified example of the scroll fluid machine of the fifth embodiment.

[0024] Hereinafter, an embodiment of a scroll fluid machine according to the present disclosure will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are designated by the same reference numerals, and duplicated explanations will be omitted.

[0025] 1 includes a housing 2, a fixed scroll 3, an orbiting scroll 4, an eccentric shaft 5A, and a rotation inhibiting mechanism 6A. The housing 2 includes a housing orbiting surface 2a, a housing fixed surface 2b, and a housing bearing 23. The fixed scroll 3 includes a fixed scroll body 31 and a fixed wrap 32. The fixed wrap 32 stands on the main surface 31a of the fixed scroll body 31. The back surface 31b of the fixed scroll body 31 faces the housing fixed surface 2b. The back surface 31b of the fixed scroll body 31 may be fixed to the housing fixed surface 2b. In other words, the position of the fixed scroll 3 relative to the housing 2 is fixed.

[0026] The orbiting scroll 4 has an orbiting scroll body 41 and an orbiting wrap 42. The orbiting wrap 42 stands on the main surface 41a of the orbiting scroll body 41. The back surface 41b of the orbiting scroll body 41 faces the housing orbiting surface 2a. The back surface 41b of the orbiting scroll body 41 is slightly spaced from the housing orbiting surface 2a. Therefore, the back surface 41b of the orbiting scroll body 41 is not fixed to the housing orbiting surface 2a. In other words, the position of the orbiting scroll 4 relative to the housing 2 changes. A scroll bearing 43 is provided on the back surface 41b of the orbiting scroll body 41.

[0027] The eccentric shaft 5A has a rotating shaft portion 51 and an eccentric shaft portion 52. The rotating shaft portion 51 is a cylindrical member. The central axis of the rotating shaft portion 51, based on its shape, is defined as a rotation axis A51. The rotating shaft portion 51 rotates about the rotation axis A51. Torque is applied to one end of the rotating shaft portion 51 from a drive source such as a motor. The other end of the rotating shaft portion 51 is rotatably supported by a housing bearing 23. The eccentric shaft portion 52 is provided at the other end of the rotating shaft portion 51.

[0028] The eccentric shaft portion 52 is a cylindrical member. The central axis of the eccentric shaft portion 52, based on its shape, is defined as an eccentric axis A52. The eccentric axis A52 is parallel to the rotation axis A51 and is spaced a predetermined distance from the rotation axis A51. The eccentric shaft portion 52 revolves around the rotation axis A51, centering on the eccentric axis A52.

[0029] The eccentric shaft portion 52 is connected to a scroll bearing 43 provided on the orbiting scroll 4. The eccentric shaft portion 52 is rotatable relative to the orbiting scroll 4. This rotatability means that the orbiting scroll 4 can rotate on its own axis relative to the eccentric shaft portion 52, with the eccentric axis A52 of the eccentric shaft portion 52 as the center of rotation. Focusing only on the relationship between the eccentric shaft portion 52 and the orbiting scroll 4, the orbiting scroll 4 can rotate on its own axis about the eccentric axis A52 and orbit about the rotation axis A51.

[0030] Here, the orbiting scroll 4 is first required to orbit around the rotation axis A51. At the same time, the orientation of the orbiting scroll 4 must be maintained with respect to the housing 2. This maintaining of the orientation of the orbiting scroll 4 means that the orbiting scroll 4 is not rotating around the eccentric axis A52 as viewed from the housing 2. Note that the orbiting scroll 4 appears not to rotate when viewed from the housing 2. If the orbiting scroll 4 is viewed from the eccentric shaft 5A, the orbiting scroll 4 appears to orbit around the eccentric axis A52.

[0031] Although orbiting can be achieved with only the orbiting scroll 4 and the eccentric shaft 5A, rotation about the eccentric axis A52 is permitted, making it impossible to maintain the orientation of the orbiting scroll 4. Therefore, the scroll fluid machine 1A includes a rotation-inhibiting mechanism 6A for restricting rotation about the eccentric axis A52. Such a rotation-inhibiting mechanism has also been included in conventional scroll fluid machines. For example, a pin-crank mechanism having an eccentric shaft can be used as the rotation-inhibiting mechanism. The pin-crank mechanism includes a housing shaft rotatably connected to the housing and an eccentric shaft connected to the orbiting scroll, the eccentric axis of which is offset from the housing shaft by the same amount as the eccentric shaft 5A. The pin-crank mechanism includes a mechanical contact portion between the housing shaft and the housing. Similarly, the pin-crank mechanism also includes a mechanical contact portion between the eccentric shaft and the orbiting scroll.

[0032] In contrast, the rotation inhibiting mechanism 6A of the scroll fluid machine 1A of this embodiment does not involve mechanical contact, that is, it is possible to inhibit the rotation of the orbiting scroll 4 without creating any mechanical contact portion.

[0033] <Rotation Inhibition Mechanism> The rotation inhibition mechanism 6A has three rotation inhibition units 6A1, 6A2, and 6A3. Only the rotation inhibition unit 6A1 is shown in FIG. 1 . Each of the rotation inhibition units 6A1, 6A2, and 6A3 has one annular magnet 61 and one cylindrical magnet 62. The rotation inhibition units 6A1, 6A2, and 6A3 are arranged on a virtual circle (see rotation locus P4 shown in FIG. 2(b)) centered on the eccentric axis A52. For example, the distance R1 (see FIG. 2(b)) from the eccentric axis A52 to the first rotation inhibition unit 6A1 is the same as the distance R2 from the eccentric axis A52 to the second rotation inhibition unit 6A2. The same is true for the distance R3 from the eccentric axis A52 to the third rotation inhibition unit 6A3. Here, the position of first rotation-inhibiting unit 6A1 that serves as the reference for distance R1 may be defined as the center of annular magnet 61. These distances R1, R2, and R3 are clearly greater than eccentricity length RE (see FIG. 2(a)) from rotation axis A51 to eccentric axis A52.

[0034] Furthermore, rotation inhibition units 6A1, 6A2, 6A3 are arranged at equal intervals around eccentric axis A52. Therefore, when the three rotation inhibition units 6A1, 6A2, 6A3 are viewed in plan, they appear to be arranged at the vertices of an equilateral triangle.

[0035] The annular magnet 61 constituting the first rotation-inhibiting unit 6A1 is attached to the housing rotation surface 2a. More specifically, a recess 21d that is circular in plan view is provided on the housing rotation surface 2a. This recess 21d may be a through-hole or a hole with a bottom. The annular magnet 61 is fitted into this recess 21d. The annular magnet 61 does not move relative to the recess 21d. For example, the annular magnet 61 may be glued to the inner circumferential surface of the recess 21d. The inner circumferential surface of the annular magnet 61 forms a region in which the cylindrical magnet 62 can rotate. The diameter D61 (see FIG. 2(b)) of the inner circumferential surface of the annular magnet 61 is greater than the eccentric length RE from the rotation axis A51 to the eccentric axis A52. This diameter D61 allows the cylindrical magnet 62 to rotate in the rotation region formed by the annular magnet 61.

[0036] Furthermore, as shown in Figure 2, the annular magnet 61 has a main surface 61a and a back surface 61b of the annular magnet 61. The main surface 61a of the annular magnet 61 faces the back surface 41b of the orbiting scroll body 41. The back surface 61b of the annular magnet 61 faces the back side of the recess 21d. The main surface 61a of the annular magnet 61 and the back surface 61b of the annular magnet 61 each constitute a magnetic pole. This magnetic pole is determined in relation to the magnetic pole of the cylindrical magnet 62. For example, the polarity of the magnetic pole of the main surface 61a of the annular magnet 61 is set to be the same as the polarity of the magnetic pole of the back surface 62b of the cylindrical magnet 62.

[0037] The cylindrical magnets 62 constituting the first rotation-inhibiting unit 6A1 are attached to the back surface 41b of the orbiting scroll body 41. The three cylindrical magnets 62 protrude from the back surface 41b of the orbiting scroll body 41 toward the housing orbiting surface 2a. With this configuration, the cylindrical magnets 62 are positioned inside the annular magnet 61 provided on the housing orbiting surface 2a.

[0038] The cylindrical magnet 62 has a main surface 62a and a back surface 62b. The outer peripheral surface of the cylindrical magnet 62 faces the inner peripheral surface of the annular magnet 61. The main surface 62a of the cylindrical magnet 62 faces the bottom surface of the recess 21d. The back surface 62b of the cylindrical magnet 62 is fixed to the back surface 41b of the orbiting scroll body 41. In this way, the main surface 62a of the cylindrical magnet 62 is positioned on the back surface 61b side of the annular magnet 61, and the back surface 62b of the cylindrical magnet 62 is positioned on the main surface 61a side of the annular magnet 61. As mentioned above, surfaces positioned on the same side have magnetic poles of the same polarity. Therefore, the polarity of the magnetic poles on the main surface 62a of the cylindrical magnet 62 is the same as the polarity of the magnetic poles on the back surface 61b of the annular magnet 61. Furthermore, the polarity of the magnetic poles on the rear surface 62 b of the cylindrical magnet 62 is the same as the polarity of the magnetic poles on the main surface 61 a of the annular magnet 61 .

[0039] <Function of Rotation-Hindering Mechanism> Because the cylindrical magnet 62 is fixed to the orbiting scroll 4, it orbits along the orbiting trajectory P61 in the orbiting region formed by the annular magnet 61 as the orbiting scroll 4 orbits. During this orbit, the magnetic forces of the annular magnet 61 and the cylindrical magnet 62 interfere with each other. According to the arrangement of the magnetic poles described above, a repulsive force acts between the annular magnet 61 and the cylindrical magnet 62, repelling them from each other. If the cylindrical magnet 62 were constrained in the axial direction in the orbiting region but allowed free movement in the in-plane direction, the cylindrical magnet 62 would be located on the central axis of the annular magnet 61, where the repulsive forces it receives from the surrounding annular magnets 61 are balanced. As a result, when the cylindrical magnet 62 is positioned at a position offset from the center of the annular magnet 61, as shown in Figures 2(a) and 2(b), the cylindrical magnet 62 is subjected to the resultant force of the magnetic force of the cylindrical magnet 62 and the magnetic force of the annular magnet 61.

[0040] In Figure 2(b), the circle indicated by the dashed line is the rotation locus P4 along which the three cylindrical magnets 62 move when the orbiting scroll 4 is assumed to rotate. The rotation inhibiting mechanism 6A inhibits the movement of the cylindrical magnets 62 along this rotation locus P4. A state in which the cylindrical magnets 62 do not move along the rotation locus P4 is a state in which the torques resulting from the magnetic forces acting on each of the cylindrical magnets 62 are balanced. As described above, in the state shown in Figure 2(b), the magnetic forces of the cylindrical magnets 62 are unbalanced, and each cylindrical magnet 62 is subjected to a predetermined magnetic force.

[0041] For example, let us consider the first rotation-impeding unit 6A1. Next, we consider the torque that attempts to rotate the cylindrical magnet 62 along the rotation trajectory P4 in the first rotation-impeding unit 6A1. The torque acting on the cylindrical magnet 62 depends on the distance between the intersection of the rotation trajectory P4 with the outer peripheral surface of the cylindrical magnet 62 and the intersection of the rotation trajectory P4 with the inner peripheral surface of the annular magnet 61. Two arcs between these intersections are formed on both sides of the cylindrical magnet 62. As shown in FIG. 2(b), a torque component T1a acting on one side of the cylindrical magnet 62 and a torque component T1b acting on the other side can be defined. In the first rotation-impeding unit 6A1, the distance of the arc on one side is the same as the distance of the arc on the other side. In other words, the torque component T1a and the torque component T1b have the same magnitude but opposite directions, so the torque of the first rotation-impeding unit 6A1 is zero. Therefore, the cylindrical magnet 62 of the first rotation-preventing unit 6A1 is in a state where the torque along the rotation locus P4 is balanced.

[0042] Next, we will focus on the second rotation-inhibiting unit 6A2 and consider the torque that attempts to rotate the cylindrical magnet 62 of the second rotation-inhibiting unit 6A2 along the rotation locus P4. For the second rotation-inhibiting unit 6A2, torque components T2a and T2b acting from both sides of the cylindrical magnet 62 can also be defined. In the second rotation-inhibiting unit 6A2, the distance of the arc on one side is shorter than the distance of the arc on the other side. Therefore, the repulsive force (torque component T2a) generated on the shorter arc side is greater than the repulsive force (torque component T2b) generated on the longer arc side. As a result, the difference between the second torque component caused by the repulsive force generated on the shorter arc side and the first torque component caused by the repulsive force generated on the longer arc side acts on the cylindrical magnet 62 of the second rotation-inhibiting unit 6A2. In other words, when we focus only on the second rotation-inhibiting unit 6A2, the cylindrical magnet 62 of the second rotation-inhibiting unit 6A2 is in a state where it attempts to rotate clockwise along the rotation locus P4.

[0043] Next, we will focus on the third rotation-impeding unit 6A3 and consider the torque that attempts to rotate the cylindrical magnet 62 along the rotation trajectory P4 in the third rotation-impeding unit 6A3. In the third rotation-impeding unit 6A3, torque components T3a and T3b acting from both sides of the cylindrical magnet 62 can be defined. In the third rotation-impeding unit 6A3, the arc lengths on both sides of the cylindrical magnet 62 are also different. Therefore, the repulsive force (torque component T3b) acting on the shorter arc side is greater than the repulsive force (torque component T3a) acting on the longer arc side. As a result, the difference between the torque component T3b caused by the repulsive force acting on the shorter arc side and the torque component T3a caused by the repulsive force acting on the longer arc side acts on the cylindrical magnet 62 of the third rotation-impeding unit 6A3. In other words, when only the third rotation inhibition unit 6A3 is considered, the cylindrical magnet 62 of the third rotation inhibition unit 6A3 is in a state of attempting to rotate counterclockwise along the rotation locus P4.

[0044] In summary, the torque acting on the cylindrical magnet 62 of the first rotation-inhibiting unit 6A1 to rotate it along the rotation trajectory P4 is apparently zero. A torque acting on the cylindrical magnet 62 of the second rotation-inhibiting unit 6A2 to rotate it clockwise along the rotation trajectory P4 acts. A torque acting on the cylindrical magnet 62 of the third rotation-inhibiting unit 6A3 to rotate it counterclockwise along the rotation trajectory P4 acts. When these torques are combined, the torque acting on the cylindrical magnet 62 of the second rotation-inhibiting unit 6A2 and the torque acting on the cylindrical magnet 62 of the third rotation-inhibiting unit 6A3 cancel each other out. Therefore, the rotation-inhibiting mechanism 6A as a whole is in a balanced state of torque acting along the rotation trajectory P4. As a result, none of the three cylindrical magnets 62 rotate along the rotation trajectory P4, and the rotation of the orbiting scroll 4 is inhibited.

[0045] The torque balance described above is always maintained while the orbiting scroll 4 is orbiting. Figures 3(a) and 3(b) show a state in which the orbiting scroll 4 has orbited a predetermined angle from the state shown in Figures 2(a) and 2(b). In the state shown in Figures 3(a) and 3(b), the torque acting on the cylindrical magnet 62 of the first rotation-inhibiting unit 6A1 to rotate it along the rotation trajectory P4 is apparently zero. A torque acting on the cylindrical magnet 62 of the second rotation-inhibiting unit 6A2 to rotate it clockwise along the rotation trajectory P4 is acting on the cylindrical magnet 62 of the third rotation-inhibiting unit 6A3 to rotate it counterclockwise along the rotation trajectory P4. Therefore, the rotation-inhibiting mechanism 6A is in a state in which the torque acting along the rotation trajectory P4 is balanced as a whole, and the rotation of the orbiting scroll 4 is inhibited.

[0046] In this way, the rotation inhibiting mechanism 6A can exert the function of inhibiting the rotation of the orbiting scroll 4 without requiring active control of the magnetic field.

[0047] <Operation and Effect> Scroll fluid machine 1A includes: orbiting scroll 4, which includes spiral orbiting wrap 42, and orbits around rotation axis A51 defined by eccentric shaft 5A; housing 2 facing orbiting scroll 4; and rotation-impeding mechanism 6A, which allows orbiting motion of orbiting scroll 4 relative to housing 2 and impedes rotational motion of orbiting scroll 4 relative to housing 2. Rotation-impeding mechanism 6A has a plurality of rotation-impeding units 6A1, 6A2, 6A3, and each of the plurality of rotation-impeding units 6A1, 6A2, 6A3 includes: a cylindrical magnet 62 provided on orbiting scroll 4 and generating a first magnetic force; and an annular magnet 61 provided on housing 2, positioned with a gap between them and cylindrical magnet 62, and generating a second magnetic force that interferes with the first magnetic force.

[0048] This scroll fluid machine 1A is equipped with a rotation-inhibiting mechanism 6A. The rotation-inhibiting mechanism 6A exerts an effect of inhibiting the rotation of the orbiting scroll 4 by interference between the first magnetic force and the second magnetic force. In other words, the rotation-inhibiting mechanism 6A can obtain the effect of inhibiting the rotation of the orbiting scroll 4 by a configuration that eliminates physical contact. A configuration that eliminates physical contact does not lead to deterioration of components such as wear. Therefore, the rotation-inhibiting mechanism 6A, which is configured without physical contact, can have a long life. Therefore, it is possible to provide a scroll fluid machine 1A equipped with components that can have a long life.

[0049] Furthermore, the scroll fluid machine 1A equipped with the rotation inhibiting units 6A1, 6A2, 6A3 that utilize magnetic force can reduce the weight of the parts that cause orbiting, including the orbiting scroll 4, compared to a scroll fluid machine equipped with a physical pin-crank mechanism. Furthermore, the scroll fluid machine 1A of this embodiment can achieve space savings compared to a scroll fluid machine equipped with a pin-crank mechanism. Furthermore, the scroll fluid machine 1A of this embodiment can also reduce manufacturing costs compared to a scroll fluid machine equipped with a pin-crank mechanism.

[0050] A distance R1 from the first rotation-inhibiting unit 6A1 to the eccentric axis A52 is equal to a distance R2 from the second rotation-inhibiting unit 6A2 to the eccentric axis A52. With this configuration, the arrangement of the first rotation-inhibiting unit 6A1 and the second rotation-inhibiting unit 6A2 makes it possible to balance the torque that promotes the rotation of the orbiting scroll 4 as a whole in the rotation-inhibiting mechanism 6A, and to reduce the torque that promotes the rotation of the orbiting scroll 4 as a whole to zero.

[0051] Furthermore, the scroll fluid machine 1A of this embodiment can achieve a balance including the rotation torque generated in the compression process by the scroll wrap.

[0052] The distance R1 from the first rotation-inhibiting unit 6A1 to the eccentric axis A52 is longer than the eccentric length RE from the rotation axis A51 to the eccentric axis A52. Even with this configuration, the arrangement of the first rotation-inhibiting unit 6A1 and the second rotation-inhibiting unit 6A2 makes it possible to balance the torque that promotes the rotation of the orbiting scroll 4 as a whole in the rotation-inhibiting mechanism 6A, and to reduce the torque that promotes the rotation of the orbiting scroll 4 as a whole to zero.

[0053] The multiple rotation-inhibiting units 6A1, 6A2, 6A3 are arranged at equal intervals around the eccentric axis A52 of the orbiting scroll 4. Even with this configuration, the arrangement of the first rotation-inhibiting unit 6A1 and the second rotation-inhibiting unit 6A2 makes it possible to balance the torque that encourages the rotation of the orbiting scroll 4 as a whole in the rotation-inhibiting mechanism 6A, and to reduce the torque that encourages the rotation of the orbiting scroll 4 to zero as a whole.

[0054] The scroll fluid machine 1A further includes a fixed scroll 3 that cooperates with the orbiting scroll 4 to form a space for compressing or expanding the working fluid. A housing 2, which is a mating member, accommodates the orbiting scroll 4 and the fixed scroll 3. The cylindrical magnet 62 is provided on the orbiting scroll 4. The annular magnet 61 is provided on the housing 2. With this configuration, rotation of the orbiting scroll 4 relative to the housing 2 can be inhibited.

[0055] The orbiting scroll 4 is provided so as to be able to orbit with respect to the housing 2, and orbits with respect to the fixed scroll 3. The fixed scroll 3 is fixed with respect to the housing 2. According to this configuration, a scroll fluid machine 1A including the orbiting scroll 4 and the fixed scroll 3 can be obtained.

[0056] <Several Modifications of the First Embodiment> [First Modification] Fig. 4(a) is a cross-sectional view showing the configuration of a scroll fluid machine 1Aa which is a first modification of the first embodiment. A rotation-inhibiting mechanism 6Aa constituting the scroll fluid machine 1Aa which is the first modification has an annular magnet 61 and a cylindrical magnet 62. In the first modification, the cylindrical magnet 62 is provided in the housing 2, and the annular magnet 61 is provided in the orbiting scroll 4. Even with the configuration of the scroll fluid machine 1Aa, it is possible to inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1A of the first embodiment.

[0057] 4(b) is a cross-sectional view showing the configuration of a scroll fluid machine 1Ab which is a second modification of the first embodiment. The rotation-impeding mechanism 6Ab constituting the scroll fluid machine 1Ab of the second modification has an annular magnet 61 provided on the fixed scroll 3 and a cylindrical magnet 62 provided on the orbiting scroll 4. The configuration of the scroll fluid machine 1Ab can also impede the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1A of the first embodiment.

[0058] 4(c) is a cross-sectional view showing the configuration of a scroll fluid machine 1Ac which is a third modified example related to the first embodiment. The rotation-inhibiting mechanism 6Ac constituting the scroll fluid machine 1Ac of the third modified example has a cylindrical magnet 62 provided on the fixed scroll 3 and an annular magnet 61 provided on the orbiting scroll 4. Even with the configuration of the scroll fluid machine 1Ac, it is possible to inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1A of the first embodiment.

[0059] [Fourth Modification] Figure 5(a) is a cross-sectional view showing the configuration of a scroll fluid machine 1Ad which is a fourth modification of the first embodiment. The scroll fluid machine 1Ad which is the fourth modification includes a first scroll module 4M and a second scroll module 8M. The first scroll module 4M includes a first orbiting scroll 4, a first eccentric shaft 5A, and a first rotation-inhibiting mechanism 6Ad1. The first orbiting scroll 4 orbits due to rotation of the first eccentric shaft 5A. The first orbiting scroll 4 is permitted to orbit and inhibited from rotating by the first rotation-inhibiting mechanism 6Ad1. The first rotation-inhibiting mechanism 6Ad1 includes an annular magnet 61 provided in the housing 2 and a cylindrical magnet 62 provided in the first orbiting scroll 4.

[0060] The second scroll module 8M has a similar configuration. The second scroll module 8M has a second orbiting scroll 8, a second eccentric shaft 5B, and a second rotation-inhibiting mechanism 6Ad2. The second orbiting scroll 8 orbits due to rotation of the second eccentric shaft 5B. The second orbiting scroll 8 is permitted to orbit but inhibited from rotating by the second rotation-inhibiting mechanism 6Ad2. The second rotation-inhibiting mechanism 6Ad2 has an annular magnet 61 provided in the housing 2 and a cylindrical magnet 62 provided in the second orbiting scroll 8.

[0061] Even with the configuration of the scroll fluid machine 1Ad, it is possible to inhibit the rotation of the first orbiting scroll 4 and the second orbiting scroll 8, similar to the scroll fluid machine 1A of the first embodiment.

[0062] [Fifth Modification] Fig. 5(b) is a cross-sectional view showing the configuration of a scroll fluid machine 1Ae which is a fifth modification of the first embodiment. Like the scroll fluid machine 1Ad which is the fourth modification, the scroll fluid machine 1Ae which is the fifth modification also has a first scroll module 4M including a first orbiting scroll 4 and a second scroll module 8M including a second orbiting scroll 8. Meanwhile, in the fifth modification, the first rotation-inhibiting mechanism 6Ae1 has a cylindrical magnet 62 provided in the housing 2 and an annular magnet 61 provided in the first orbiting scroll 4. Similarly, the second rotation-inhibiting mechanism 6Ae2 has a cylindrical magnet 62 provided in the housing 2 and an annular magnet 61 provided in the second orbiting scroll 8. The configuration of the scroll fluid machine 1Ae can inhibit the rotation of the first orbiting scroll 4 and the second orbiting scroll 8, similar to the scroll fluid machine 1A of the first embodiment.

[0063] [Sixth Modification] Fig. 5(c) is a cross-sectional view showing the configuration of a scroll fluid machine 1Af according to a sixth modification of the first embodiment. Like the scroll fluid machine 1Ad according to the fourth modification, the scroll fluid machine 1Af according to the sixth modification also includes a first scroll module 4M including a first orbiting scroll 4 and a second scroll module 8M including a second orbiting scroll 8. Meanwhile, the sixth modification includes a pair of rotation-inhibiting mechanisms 6Af1 and 6Af2. The rotation-inhibiting mechanism 6Af1 includes an annular magnet 61 provided on the first orbiting scroll 4 and a cylindrical magnet 62 provided on the second orbiting scroll 8. The rotation-inhibiting mechanism 6Af2 includes an annular magnet 61 provided on the second orbiting scroll 8 and a cylindrical magnet 62 provided on the housing 2. The configuration of the scroll fluid machine 1Af also allows for the inhibition of rotation of the first orbiting scroll 4 and the second orbiting scroll 8, similar to the scroll fluid machine 1A according to the first embodiment.

[0064] 6(a) and 6(b) show a rotation inhibiting mechanism 6B of a scroll fluid machine 1B according to a second embodiment. Figures 7(a) and 7(b) show the rotation inhibiting mechanism 6B in a state where the orbiting scroll has orbited 180 degrees from the state shown in Figures 6(a) and 6(b).

[0065] The basic components of the scroll fluid machine 1B, namely the housing 2, the fixed scroll 3, the orbiting scroll 4 and the eccentric shaft 5A, are the same as those of the scroll fluid machine 1A of the first embodiment, and therefore detailed description thereof will not be repeated.

[0066] The rotation inhibiting mechanism 6B has two rotation inhibiting units 6B1 and 6B2. Each of the two rotation inhibiting units 6B1 and 6B2 is disposed on a radial axis L62 that passes through the eccentric axis A52. Therefore, as in the first embodiment, in the second embodiment, the rotation inhibiting units 6B1 and 6B2 can be said to be disposed on an imaginary circle centered on the eccentric axis A52. Furthermore, the distance from the eccentric axis A52 to the first rotation inhibiting unit 6B1 is the same as the distance from the eccentric axis A52 to the second rotation inhibiting unit 6B2.

[0067] The rotation inhibition unit 6B1 includes a pair of plate-shaped magnets 631, 632 and one cylindrical magnet 62. The pair of plate-shaped magnets 631, 632 are provided in the housing 2. More specifically, a long groove 25 extending along the radial axis L62 is provided in the housing rotation surface 2a. A pair of plate-shaped magnets 631, 632 is fixed to each of a pair of inner wall surfaces 25s1, 25s2 that form the long groove 25. The pair of plate-shaped magnets 631, 632 are arranged on both sides of the radial axis L62, sandwiching the radial axis L62. The pair of plate-shaped magnets 631, 632 are arranged so as to be parallel to the radial axis L62. The distance between the pair of plate-shaped magnets 631, 632 is greater than the diameter of the cylindrical magnet 62. In other words, a predetermined gap is formed between the pair of plate-shaped magnets 631, 632 and the cylindrical magnet 62.

[0068] One cylindrical magnet 62 is provided on the orbiting scroll 4. The configuration of this cylindrical magnet 62 is the same as that of the first embodiment, and therefore detailed description thereof will not be repeated.

[0069] Like the rotation inhibiting mechanism 6A of the first embodiment, the rotation inhibiting mechanism 6B of the second embodiment utilizes the repulsive force generated between the pair of plate-shaped magnets 631, 632 and the cylindrical magnet 62. Therefore, the polarity of the main surfaces 631 a, 632 a of the pair of plate-shaped magnets 631, 632 is the same as the polarity of the back surface 62 b of the cylindrical magnet 62. Similarly, the polarity of the back surfaces 631 b, 632 b of the pair of plate-shaped magnets 631, 632 is also the same as the polarity of the main surface 62 a of the cylindrical magnet 62.

[0070] The rotation inhibiting mechanism 6B of the second embodiment also achieves a balanced torque state overall, thereby inhibiting the rotation of the orbiting scroll 4.

[0071] <Operation and Effect> With this configuration as well, it is possible to realize a configuration that inhibits the rotation of the orbiting scroll 4 with a simple configuration while eliminating physical contact.

[0072] <Several Modifications of the Second Embodiment> [First Modification] Fig. 8(a) is a cross-sectional view showing the configuration of a scroll fluid machine 1Ba which is a first modification of the second embodiment. The rotation inhibiting mechanism 6Ba constituting the scroll fluid machine 1Ba has a cylindrical magnet 62 provided in the housing 2 and a pair of plate-shaped magnets 631, 632 (the plate-shaped magnet 632 is not shown) provided in the orbiting scroll 4. The scroll fluid machine 1Ba can also inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1B of the second embodiment.

[0073] 8(b) is a cross-sectional view showing the configuration of a scroll fluid machine 1Bb which is a second modification of the second embodiment. The rotation-inhibiting mechanism 6Bb constituting the scroll fluid machine 1Bb has a cylindrical magnet 62 provided on the orbiting scroll 4 and a pair of plate-shaped magnets 631, 632 (the plate-shaped magnet 632 is not shown) provided on the fixed scroll 3. The scroll fluid machine 1Bb can also inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1B of the second embodiment.

[0074] 8(c) is a cross-sectional view showing the configuration of a scroll fluid machine 1Bc which is a third modification of the second embodiment. The rotation-inhibiting mechanism 6Bc constituting the scroll fluid machine 1Bc has a cylindrical magnet 62 provided on the fixed scroll 3 and a pair of plate-shaped magnets 631, 632 provided on the orbiting scroll 4. The scroll fluid machine 1Bc can also inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1B of the second embodiment.

[0075] 9A is a cross-sectional view showing the configuration of a scroll fluid machine 1Bd, which is a fourth modification of the second embodiment. The scroll fluid machine 1Bd has a first orbiting scroll 4 and a second orbiting scroll 8. In the fourth modification, the first rotation-inhibiting mechanism 6Bd1 has a pair of plate-shaped magnets 631, 632 provided in the housing 2 and a cylindrical magnet 62 provided in the first orbiting scroll 4. Similarly, the second rotation-inhibiting mechanism 6Bd2 has a pair of plate-shaped magnets 631, 632 provided in the housing 2 and a cylindrical magnet 62 provided in the second orbiting scroll 8. The scroll fluid machine 1Bd can inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1B of the second embodiment.

[0076] 9(b) is a cross-sectional view showing the configuration of a scroll fluid machine 1Be which is a fifth modification of the second embodiment. The scroll fluid machine 1Be also has a first orbiting scroll 4 and a second orbiting scroll 8. In the fifth modification, the first rotation-inhibiting mechanism 6Be1 has a pair of plate-shaped magnets 631, 632 provided on the first orbiting scroll 4 and a cylindrical magnet 62 provided on the housing 2. Similarly, the second rotation-inhibiting mechanism 6Be2 has a pair of plate-shaped magnets 631, 632 provided on the second orbiting scroll 8 and a cylindrical magnet 62 provided on the housing 2. The scroll fluid machine 1Be can inhibit the rotation of the orbiting scroll 4 in the same way as the scroll fluid machine 1B of the second embodiment.

[0077] 9(c) is a cross-sectional view showing the configuration of a scroll fluid machine 1Bf which is a sixth modified example related to the second embodiment. The scroll fluid machine 1Bf which is the sixth modified example also has a first orbiting scroll 4 and a second orbiting scroll 8. In the sixth modified example, the rotation inhibiting mechanism 6Bf has a pair of plate-shaped magnets 631, 632 provided on the first orbiting scroll 4 and a cylindrical magnet 62 provided on the second orbiting scroll 8. The scroll fluid machine 1Bf can also inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1B of the second embodiment.

[0078] 10(a) and 10(b) show a rotation inhibiting mechanism 6C of a scroll fluid machine 1C according to a third embodiment. Figures 11(a) and 11(b) show the rotation inhibiting mechanism 6C in a state in which the orbiting scroll has orbited 180 degrees from the state shown in Figures 10(a) and 10(b).

[0079] The rotation-inhibiting mechanism 6A of the first embodiment and the rotation-inhibiting mechanism 6B of the second embodiment each utilize a repulsive force generated between two magnets. The rotation-inhibiting mechanism 6C can also utilize an attractive force generated between two magnets. The basic components of the scroll fluid machine 1C, namely the housing 2, the fixed scroll 3, the orbiting scroll 4, and the eccentric shaft 5A, are the same as those of the scroll fluid machine 1A of the first embodiment, and therefore detailed description thereof will not be repeated. The rotation-inhibiting mechanism 6C of the scroll fluid machine 1C of the third embodiment utilizes an attractive force.

[0080] The rotation-inhibiting mechanism 6C has three rotation-inhibiting units 6C1, 6C2, and 6C3. The arrangement of the three rotation-inhibiting units 6C1, 6C2, and 6C3 is the same as the arrangement of the rotation-inhibiting units 6A1, 6A2, and 6A3 of the first embodiment. The rotation-inhibiting units 6C1, 6C2, and 6C3 of the third embodiment have a first embedded magnet 64 and a second embedded magnet 65. The first embedded magnet 64 is provided in the housing 2. The second embedded magnet 65 is provided in the orbiting scroll 4. As the orbiting scroll 4 orbits, the second embedded magnet 65 rotates along a trajectory P65 around the first embedded magnet 64.

[0081] More specifically, the first embedded magnet 64 is embedded in a hole formed in the housing orbiting surface 2 a. The main surface 64 a of the first embedded magnet 64 is either flush with the housing orbiting surface 2 a or is recessed from the housing orbiting surface 2 a. The main surface 64 a of the first embedded magnet 64 is allowed to protrude from the housing orbiting surface 2 a to the extent that it does not come into contact with the back surface 41 b of the orbiting scroll body 41.

[0082] The second embedded magnet 65 orbits around the first embedded magnet 64 as the orbiting scroll 4 orbits. For example, the central axis of orbit of the second embedded magnet 65 may coincide with the central axis of the first embedded magnet 64 in a planar view. Furthermore, when the second embedded magnet 65 is viewed in a planar view, the second embedded magnet 65 does not overlap with the first embedded magnet 64. Therefore, the distance from the central axis of the first embedded magnet 64 to the central axis of the second embedded magnet 65 is greater than the combined length of the radius of the first embedded magnet 64 and the radius of the second embedded magnet 65.

[0083] As mentioned above, the rotation-preventing mechanism 6C of the third embodiment utilizes attractive force. Therefore, the magnetic poles of the first embedded magnet 64 and the second embedded magnet 65 are arranged so that attractive force acts between them. More specifically, this attractive force acts between the main surface 64a of the first embedded magnet 64 and the main surface 65a of the second embedded magnet 65. The main surfaces 64a of the first embedded magnet 64 and the main surfaces 65a of the second embedded magnet 65 are positioned to face each other, but as described above, the first embedded magnet 64 and the second embedded magnet 65 do not overlap each other in a planar view. Therefore, the attractive force includes not only a component along the eccentric axis A52 but also a component directed in a planar direction on the housing orbiting surface 2a or the back surface 41b of the orbiting scroll main body 41. The attractive force including these components can inhibit the rotation of the orbiting scroll 4, similar to the rotation-preventing mechanism 6A of the first embodiment.

[0084] <Operation and Effect> With this configuration as well, it is possible to realize a configuration that inhibits the rotation of the orbiting scroll 4 with a simple configuration while eliminating physical contact.

[0085] 12(a) is a cross-sectional view showing the configuration of a scroll fluid machine 1Ca which is a first modification of the third embodiment. The scroll fluid machine 1Ca includes a rotation-inhibiting mechanism 6Ca which has a second embedded magnet 65 provided in the orbiting scroll 4 and a first embedded magnet 64 provided in the fixed scroll 3. The scroll fluid machine 1Ca can inhibit the rotation of the orbiting scroll 4 in the same way as the scroll fluid machine 1C of the third embodiment.

[0086] 12(b) is a cross-sectional view showing the configuration of a scroll fluid machine 1Cb, which is a second modification of the third embodiment. The scroll fluid machine 1Cb has a first orbiting scroll 4 and a second orbiting scroll 8. In the second modification, the first rotation-inhibiting mechanism 6Cb1 has a first embedded magnet 64 provided in the housing 2 and a second embedded magnet 65 provided in the first orbiting scroll 4. Similarly, the second rotation-inhibiting mechanism 6Cb2 has a first embedded magnet 64 provided in the housing 2 and a second embedded magnet 65 provided in the second orbiting scroll 8. The scroll fluid machine 1Cb can also inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1C of the third embodiment.

[0087] 12(c) is a cross-sectional view showing the configuration of a scroll fluid machine 1Cc which is a third modification of the third embodiment. The scroll fluid machine 1Cc also has a first orbiting scroll 4 and a second orbiting scroll 8. In the third modification, the rotation-inhibiting mechanism 6Cc has a first embedded magnet 64 provided in the first orbiting scroll 4 and a second embedded magnet 65 provided in the second orbiting scroll 8. The scroll fluid machine 1Cc can also inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1C of the third embodiment.

[0088] 13(a) and 13(b) show a rotation inhibiting mechanism 6D of a scroll fluid machine 1D according to a fourth embodiment. Figures 14(a) and 14(b) show the rotation inhibiting mechanism 6D in a state in which the orbiting scroll has orbited 180 degrees from the state shown in Figures 13(a) and 13(b).

[0089] The basic components of the scroll fluid machine 1D, namely the housing 2, the fixed scroll 3, the orbiting scroll 4, and the eccentric shaft 5A, are the same as those of the scroll fluid machine 1A of the first embodiment, and therefore detailed description thereof will not be repeated. The rotation inhibiting mechanism 6D of the scroll fluid machine 1D of the fourth embodiment also utilizes gravitational force, as in the third embodiment. The rotation inhibiting mechanism 6D of the fourth embodiment has three rotation inhibiting units 6D1, 6D2, and 6D3. The arrangement of these units is the same as that of the rotation inhibiting units 6A1, 6A2, and 6A3 of the first embodiment, and therefore detailed description thereof will be omitted.

[0090] Each of the rotation inhibiting units 6D1, 6D2, and 6D3 has a movable magnet structure 66 and a fixed embedded magnet 67. The fixed embedded magnet 67 is similar to the second embedded magnet 65 of the third embodiment, and therefore a detailed description thereof will be omitted.

[0091] The movable magnet structure 66 is provided in the housing 2. More specifically, the movable magnet structure 66 is fitted into a recess provided in the housing rotation surface 2a. The movable magnet structure 66 has a bearing 661, a disk spacer 662, and a driven-side embedded magnet 663. The outer ring of the bearing 661 is fitted so as to contact the inner circumferential surface of the recess, and the disk spacer 662, in which the driven-side embedded magnet 663 is embedded, is fitted into the inner ring of the bearing 661. With this configuration, the driven-side embedded magnet 663 can rotate relative to the housing 2 as the disk spacer 662 rotates.

[0092] A predetermined gap is formed between the fixed embedded magnet 67 and the driven-side embedded magnet 663, so they do not come into contact with each other. When viewed from above in the direction of the eccentric axis A52, the fixed embedded magnet 67 and the driven-side embedded magnet 663 overlap each other.

[0093] The relationship between the fixed embedded magnet 67 and the driven-side embedded magnet 663 will be further described. When the orbiting scroll 4 orbits, the fixed embedded magnet 67 of the orbiting scroll 4 also orbits along an orbiting locus P67. The central axis of the fixed embedded magnet 67 coincides with the central axis of the orbiting locus P67. Furthermore, the diameter of the disk spacer 662 is larger than the diameter of the orbiting locus P67.

[0094] As the orbiting scroll 4 orbits, the fixed embedded magnet 67 also moves along the orbital trajectory P67. At this time, an attractive force acts between the fixed embedded magnet 67 and the driven-side embedded magnet 663, so the driven-side embedded magnet 663 also rotates as the fixed embedded magnet 67 moves. In the rotation-inhibiting mechanism 6A of the first embodiment, when the three rotation-inhibiting units 6A1, 6A2, and 6A3 are viewed individually, a torque acts along the rotation trajectory P4, resulting in a balanced overall structure. In contrast, in the rotation-inhibiting mechanism 6D of the fourth embodiment, although an attractive force acts along the eccentric axis A52, a torque along the rotation trajectory P4 does not generally act. In other words, the rotation-inhibiting mechanism 6D of the fourth embodiment is in a stable state in which the attractive forces acting between the fixed embedded magnet 67 and the driven-side embedded magnet 663 are balanced. If the orbiting scroll 4 rotates and enters an unstable state where the gravitational forces are not balanced, the rotation inhibiting mechanism 6D will attempt to return to a stable state where the gravitational forces are balanced. As a result, the rotation of the orbiting scroll 4 can be inhibited.

[0095] <Operation and Effect> With this configuration as well, it is possible to realize a configuration that inhibits the rotation of the orbiting scroll 4 with a simple configuration while eliminating physical contact.

[0096] 15(a) is a cross-sectional view showing the configuration of a scroll fluid machine 1Da which is a first modification of the fourth embodiment. The scroll fluid machine 1Da includes a rotation-inhibiting mechanism 6Da which has a movable magnet structure 66 provided in the orbiting scroll 4 and a fixed embedded magnet 67 provided in the housing 2. The scroll fluid machine 1Da can also inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1D of the fourth embodiment.

[0097] 15(b) is a cross-sectional view showing the configuration of a scroll fluid machine 1Db which is a second modification of the fourth embodiment. The rotation inhibiting mechanism 6Db constituting the scroll fluid machine 1Db has a fixed embedded magnet 67 provided in the fixed scroll 3 and a movable magnet structure 66 provided in the orbiting scroll 4. The scroll fluid machine 1Db can also inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1D of the fourth embodiment.

[0098] [Third Modification] Fig. 15(c) is a cross-sectional view showing the configuration of a scroll fluid machine 1Dc which is a third modification of the fourth embodiment. The scroll fluid machine 1Dc includes a rotation-inhibiting mechanism 6Dc having a movable magnet structure 66 provided in the fixed scroll 3 and a fixed embedded magnet 67 provided in the orbiting scroll 4. The scroll fluid machine 1Dc can inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1D of the fourth embodiment. [Fourth Modification] Fig. 16(a) is a cross-sectional view showing the configuration of a scroll fluid machine 1Dd which is a fourth modification of the fourth embodiment. The scroll fluid machine 1Dd has a first orbiting scroll 4 and a second orbiting scroll 8. In the fourth modification, the first rotation-inhibiting mechanism 6Dd1 has a movable magnet structure 66 provided in the first orbiting scroll 4 and a fixed embedded magnet 67 provided in the housing 2. Similarly, the second rotation inhibiting mechanism 6Dd2 has a movable magnet structure 66 provided on the second orbiting scroll 8 and a fixed embedded magnet 67 provided on the housing 2. The scroll fluid machine 1Dd can also inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1D of the fourth embodiment.

[0099] 16(b) is a cross-sectional view showing the configuration of a scroll fluid machine 1De which is a fifth modification of the fourth embodiment. The scroll fluid machine 1De also has a first orbiting scroll 4 and a second orbiting scroll 8. In the fifth modification, the first rotation-inhibiting mechanism 6De1 has a movable magnet structure 66 provided in the housing 2 and a fixed embedded magnet 67 provided in the first orbiting scroll 4. Similarly, the second rotation-inhibiting mechanism 6De2 has a movable magnet structure 66 provided in the housing 2 and a fixed embedded magnet 67 provided in the second orbiting scroll 8. The scroll fluid machine 1De can inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1D of the fourth embodiment.

[0100] 16(c) is a cross-sectional view showing the configuration of a scroll fluid machine 1Df which is a sixth modification of the fourth embodiment. The scroll fluid machine 1Df also has a first orbiting scroll 4 and a second orbiting scroll 8. In the sixth modification, the first rotation-inhibiting mechanism 6Df has a movable magnet structure 66 provided in the first orbiting scroll 4 and a fixed embedded magnet 67 provided in the second orbiting scroll 8. The scroll fluid machine 1Df can also inhibit the rotation of the orbiting scroll 4, similar to the scroll fluid machine 1D of the fourth embodiment.

[0101] Fifth Embodiment FIG. 17( a) shows a scroll fluid machine 1E according to a fifth embodiment. The fifth embodiment is a scroll fluid machine 1E employing a so-called co-rotation system. The scroll fluid machine 1E includes a first rotating scroll module 4U and a second rotating scroll module 8U. The first rotating scroll module 4U includes a first rotating scroll 4R and a first rotating shaft 5E1. Unlike the first embodiment, the rotation axis A51 of the first rotating shaft 5E1 and the rotation axis of the first rotating scroll 4R are aligned. In other words, the first rotating scroll 4R does not orbit, but only rotates. The second rotating scroll module 8U has a similar configuration. The second rotating scroll module 8U includes a second rotating scroll 8R and a second rotating shaft 5E2.

[0102] The rotation axis A51 of the first rotating shaft 5E1 is not aligned with the rotation axis A53 of the second rotating shaft 5E2, but is offset by a predetermined distance from the axis A53. In other words, the first rotating scroll module 4U and the second rotating scroll module 8U are eccentrically arranged relative to each other.

[0103] For example, torque is applied to the second rotating shaft 5E2 from a drive source 81 such as a motor. In other words, the second rotating scroll module 8U is the driving side. The torque applied to the second rotating scroll module 8U is transmitted to the first rotating scroll module 4U via the non-contact power transmission mechanism 6E. In other words, the first rotating scroll module 4U is the driven side.

[0104] The non-contact power transmission mechanism 6E transmits power (torque) from the second rotating scroll 8R to the first rotating scroll 4R while allowing for eccentricity between the first rotating scroll 4R and the second rotating scroll 8R. The non-contact power transmission mechanism 6E employs a non-contact configuration similar to the rotation inhibiting mechanism 6A (see FIG. 2(a) etc.). The non-contact power transmission mechanism 6E transmits power (torque) from the second rotating scroll 8R to the first rotating scroll 4R using magnetic force.

[0105] The non-contact power transmission mechanism 6E has multiple non-contact power transmission units 6E1, 6E2. For example, the number of non-contact power transmission units may be six. The non-contact power transmission unit 6E1 has a cylindrical magnet 62 provided on the second rotating scroll 8R and an annular magnet 61 provided on the first rotating scroll 4R. The non-contact power transmission unit 6E1 may also have the cylindrical magnet 62 provided on the first rotating scroll 4R and the annular magnet 61 provided on the second rotating scroll 8R. The relative positional relationship and magnetic pole relationship between the annular magnet 61 and the cylindrical magnet 62 are the same as those of the rotation inhibition unit 6A1 of the first embodiment.

[0106] <Effects> The scroll fluid machine 1E including the non-contact power transmission mechanism 6E can transmit power from the second rotating scroll 8R to the first rotating scroll 4R without direct contact between the member (cylindrical magnet 62) provided on the second rotating scroll 8R and the member (annular magnet 61) provided on the first rotating scroll 4R. Furthermore, the scroll fluid machine 1E including the non-contact power transmission mechanism 6E can also achieve effects such as weight reduction, space saving, and cost reduction of parts that involve rotational movement, similar to the scroll fluid machine 1A of the first embodiment including the rotation inhibiting mechanism 6A.

[0107] <Some Modifications of the Fifth Embodiment> Fig. 17(b) is a cross-sectional view showing the configuration of a scroll fluid machine 1Ea which is a first modification of the fifth embodiment. The non-contact power transmission mechanism 6Ea constituting the scroll fluid machine 1Ea also includes multiple non-contact power transmission units 6Ea1, 6Ea2. For example, the non-contact power transmission unit 6Ea1 includes a cylindrical magnet 62 provided on the first rotating scroll 4R and a pair of plate-shaped magnets 631, 632 (the plate-shaped magnet 632 is not shown) provided on the second rotating scroll 8R. Note that the non-contact power transmission unit 6Ea1 may also include a cylindrical magnet 62 provided on the second rotating scroll 8R and a pair of plate-shaped magnets 631, 632 provided on the first rotating scroll 4R. In other words, the non-contact power transmission mechanism 6Ea included in the scroll fluid machine 1Ea has a configuration similar to the rotation-inhibiting mechanism 6B (see Fig. 6(a) and the like) exemplified in the second embodiment. In the scroll fluid machine 1Ea, similarly to the scroll fluid machine 1E of the fifth embodiment, power can be transmitted from the second rotating scroll 8R to the first rotating scroll 4R in a non-contact manner.

[0108] FIG. 18(a) is a cross-sectional view showing the configuration of a scroll fluid machine 1Eb, which is a second modified example of the fifth embodiment. The non-contact power transmission mechanism 6Eb constituting the scroll fluid machine 1Eb also includes multiple non-contact power transmission units 6Eb1 and 6Eb2. For example, the non-contact power transmission unit 6Eb1 includes a first embedded magnet 64 provided in the first rotating scroll 4R and a second embedded magnet 65 provided in the second rotating scroll 8R. In other words, the non-contact power transmission mechanism 6Eb included in the scroll fluid machine 1Eb has a configuration similar to the rotation inhibiting mechanism 6C (see FIG. 10(a) and other figures) exemplified in the third embodiment. The scroll fluid machine 1Eb can also transmit power from the second rotating scroll 8R to the first rotating scroll 4R in a non-contact manner, similar to the scroll fluid machine 1E of the fifth embodiment.

[0109] FIG. 18(b) is a cross-sectional view showing the configuration of a scroll fluid machine 1Ec, which is a third modified example of the fifth embodiment. The non-contact power transmission mechanism 6Ec constituting the scroll fluid machine 1Ec also has multiple non-contact power transmission units 6Ec1, 6Ec2. The non-contact power transmission unit 6Ec1 constituting the scroll fluid machine 1Ec has a movable magnet structure 66 provided in the first rotating scroll 4R and a fixed embedded magnet 67 provided in the second rotating scroll 8R. Note that the non-contact power transmission unit 6Ec1 may also have a movable magnet structure 66 provided in the second rotating scroll 8R and an embedded magnet 67 provided in the first rotating scroll 4R. In other words, the non-contact power transmission mechanism 6Ec provided in the scroll fluid machine 1Ec has a configuration similar to the rotation inhibiting mechanism 6D exemplified in the fourth embodiment (see FIG. 14(a) and the like). In the scroll fluid machine 1Ec, similarly to the scroll fluid machine 1E of the fifth embodiment, power can be transmitted from the second rotating scroll 8R to the first rotating scroll 4R in a non-contact manner.

[0110] <Additional Remarks> The present disclosure includes the following configurations.

[0111] The present disclosure is [1] "a scroll fluid machine comprising: a scroll member including a spiral wrap and revolving around a rotation axis defined by a shaft; a mating member facing the scroll member; and a rotation-impeding mechanism that allows the scroll member to revolve relative to the mating member and impedes the scroll member's rotation relative to the mating member, wherein the rotation-impeding mechanism has a plurality of rotation-impeding units, and the rotation-impeding units include: a first magnetic force generating section that is provided on the scroll member and generates a first magnetic force; and a second magnetic force generating section that is provided on the mating member and is positioned with a gap between it and the first magnetic force generating section, and that generates a second magnetic force that interferes with the first magnetic force."

[0112] The present disclosure is [2] "A scroll fluid machine as described in the above [1], wherein the scroll member defines an eccentric axis that is parallel to the rotation axis and spaced a predetermined distance from the rotation axis, and the distance from the first rotation-inhibiting unit to the eccentric axis is equal to the distance from the second rotation-inhibiting unit to the eccentric axis."

[0113] The present disclosure is [3] "A scroll fluid machine as described in [1] or [2] above, wherein the scroll member defines an eccentric axis that is parallel to the rotation axis and spaced a predetermined distance from the rotation axis, and the distance from the rotation inhibiting unit to the eccentric axis is longer than the distance from the rotation axis to the eccentric axis."

[0114] The present disclosure is [4] "A scroll fluid machine according to any one of the above [1] to [3], wherein the scroll member defines an eccentric axis that is parallel to the rotation axis and spaced a predetermined distance from the rotation axis, and the plurality of rotation-inhibiting units are arranged at equal intervals around the eccentric axis of the scroll member."

[0115] The present disclosure is [5] "A scroll fluid machine according to any one of the above [1] to [4], further comprising a second scroll member that cooperates with the first scroll member to form a space for compressing or expanding a working fluid, the mating member being a housing that accommodates the first scroll member and the second scroll member, the first magnetic force generating unit being provided on the first scroll member, and the second magnetic force generating unit being provided on the housing."

[0116] The present disclosure is [6] "A scroll fluid machine according to any one of the above [1] to [4], wherein the scroll fluid machine is a housing that accommodates the scroll member and the counter member, the counter member being a second scroll member that cooperates with the first scroll member to form a space for compressing or expanding a working fluid, the first magnetic force generating unit being provided in the first scroll member, and the second magnetic force generating unit being provided in the second scroll member."

[0117] The present disclosure is [7] "A scroll fluid machine according to the above [5] or [6], wherein the first magnetic force generating unit is one of a ring-shaped magnet and a cylindrical magnet having a cylindrical shape with a diameter smaller than the inner diameter of the ring-shaped magnet, and the second magnetic force generating unit is the other of the ring-shaped magnet and the cylindrical magnet."

[0118] The present disclosure is [8] "A scroll fluid machine according to the above [5] or [6], wherein the first magnetic force generating unit is one of a pair of flat plate-shaped magnets spaced apart from each other and a cylindrical magnet arranged between the pair of flat plate magnets, and the second magnetic force generating unit is the other of the pair of flat plate magnets and the cylindrical magnet."

[0119] The present disclosure is [9] "A scroll fluid machine as described in [5] or [6] above, wherein the first magnetic force generating portion is a first magnet embedded in the first scroll member, the second magnetic force generating portion is a second magnet embedded in an opposing surface of the counter member that faces the main surface of the first scroll member in which the first magnet is embedded, and the first magnet does not overlap the second magnet when viewed from the direction of the rotation axis."

[0120] The present disclosure is

[10] "A scroll fluid machine as described in [5] or [6] above, wherein the first magnetic force generating portion is a first magnet embedded in the first scroll member, the second magnetic force generating portion is a second magnet embedded in an opposing surface of the counter member that faces the main surface of the first scroll member in which the first magnet is embedded, and when viewed from the direction of the rotation axis, the first magnet includes a portion that overlaps with the second magnet."

[0121] The present disclosure is

[11] "A scroll fluid machine according to any one of the above [5] to

[10] , wherein the first scroll member is rotatably provided with respect to the housing and revolves with respect to the second scroll member, and the second scroll member is fixed with respect to the housing."

[0122] The present disclosure is

[12] "A scroll fluid machine according to any one of the above [5] to

[10] , wherein the first scroll member is rotatably provided with respect to the housing and orbits with respect to the second scroll member, and the second scroll member is rotatably provided with respect to the housing and orbits with respect to the first scroll member."

[0123] The present disclosure is

[13] "A scroll fluid machine comprising: a first rotating scroll member including a spiral first wrap and rotating about a first rotation axis defined on a first rotating shaft; a second rotating scroll member including a spiral second wrap that cooperates with the first wrap to form a region for compressing or expanding gas, the second rotating scroll member rotating about a second rotation axis defined on a second rotating shaft and disposed eccentrically with respect to the first rotation axis; and a power transmission mechanism that transmits torque from one of the first rotating scroll member and the second rotating scroll member to the other while allowing for eccentricity of the first rotating scroll member and the second rotating scroll member, wherein the power transmission mechanism has a plurality of power transmission units, and the power transmission unit includes: a first magnetic force generating portion provided on the first rotating scroll member and generating a first magnetic force; and a second magnetic force generating portion provided on the second rotating scroll member, disposed with a gap between them and the first magnetic force generating portion, and generating a second magnetic force that interferes with the first magnetic force."

[0124] 1A, 1Aa, 1Ab, 1Ac, 1Ad, 1Ae, 1Af, 1B, 1Ba, 1Bb, 1Bc, 1Bd, 1Be, 1Bf, 1C, 1Ca, 1Cb, 1Cc, 1D, 1Da, 1Db, 1Dc, 1Dd, 1De, 1Df, 1E, 1Ea, 1Eb, 1Ec...Scroll fluid machine, 2...Housing, 6A, 6Aa, 6Ab, 6Ac, 6Ad1, 6Ad2, 6Ae1, 6Ae2, 6Af, 6B, 6Ba, 6Bb, 6Bc, 6Bd1, 6Bd2, 6Be1, 6Be2, 6Bf, 6C, 6Ca, 6Cb1, 6Cb2, 6Cc, 6D, 6Da, 6Db, 6Dc, 6Dd1, 6Dd2, 6De1, 6De2, 6Df...rotation inhibition mechanism, 6A1, 6A2, 6A3, 6B1, 6B2, 6C1, 6C2, 6C3, 6D1, 6D2, 6D3...rotation inhibition unit, 6E, 6Ea, 6Eb, 6Ec...non-contact power transmission mechanism, 61...annular magnet, 62...cylindrical magnet, A51...rotation axis, A52...eccentric axis.

Claims

1. A scroll fluid machine comprising: a scroll member including a spiral wrap and revolving around a rotation axis defined by a shaft; a mating member facing the scroll member; and a rotation-impeding mechanism that allows the scroll member to revolve relative to the mating member and prevents the scroll member from rotating relative to the mating member, wherein the rotation-impeding mechanism has a plurality of rotation-impeding units, each of which includes: a first magnetic force generating section provided on the scroll member that generates a first magnetic force; and a second magnetic force generating section provided on the mating member that is positioned with a gap between it and the first magnetic force generating section and generates a second magnetic force that interferes with the first magnetic force.

2. A scroll fluid machine as described in claim 1, wherein the scroll member has an eccentric axis defined therein that is parallel to the rotation axis and spaced a predetermined distance from the rotation axis, and the distance from the first rotation-inhibiting unit to the eccentric axis is equal to the distance from the second rotation-inhibiting unit to the eccentric axis.

3. A scroll fluid machine as described in claim 1, wherein the scroll member has an eccentric axis defined therein that is parallel to the rotation axis and spaced a predetermined distance from the rotation axis, and the distance from the rotation inhibiting unit to the eccentric axis is longer than the distance from the rotation axis to the eccentric axis.

4. A scroll fluid machine as described in claim 1, wherein the scroll member has an eccentric axis defined therein that is parallel to the rotation axis and spaced a predetermined distance from the rotation axis, and the plurality of rotation-inhibiting units are arranged at equal intervals around the eccentric axis of the scroll member.

5. A scroll fluid machine as described in claim 1, further comprising a second scroll member that cooperates with the first scroll member to form a space for compressing or expanding the working fluid, the opposing member being a housing that accommodates the first scroll member and the second scroll member, the first magnetic force generating unit being provided on the first scroll member, and the second magnetic force generating unit being provided on the housing.

6. A scroll fluid machine as described in claim 1, which is a housing that accommodates the scroll member and the opposing member, the opposing member being a second scroll member that cooperates with the first scroll member to form a space for compressing or expanding the working fluid, the first magnetic force generating unit being provided on the first scroll member, and the second magnetic force generating unit being provided on the second scroll member.

7. A scroll fluid machine as described in claim 5 or 6, wherein the first magnetic force generating unit is one of a ring-shaped magnet and a cylindrical magnet having a cylindrical shape with a diameter smaller than the inner diameter of the ring-shaped magnet, and the second magnetic force generating unit is the other of the ring-shaped magnet and the cylindrical magnet.

8. A scroll fluid machine as described in claim 5 or 6, wherein the first magnetic force generating unit is one of a pair of flat plate-shaped magnets spaced apart from each other and a cylindrical magnet arranged between the pair of flat plate magnets, and the second magnetic force generating unit is the other of the pair of flat plate magnets and the cylindrical magnet.

9. A scroll fluid machine as described in claim 5 or 6, wherein the first magnetic force generating portion is a first magnet embedded in the first scroll member, the second magnetic force generating portion is a second magnet embedded in the opposing surface of the mating member facing the main surface of the first scroll member in which the first magnet is embedded, and when viewed from the direction of the rotation axis, the first magnet does not overlap the second magnet.

10. A scroll fluid machine as described in claim 5 or 6, wherein the first magnetic force generating portion is a first magnet embedded in the first scroll member, the second magnetic force generating portion is a second magnet embedded in the opposing surface of the mating member that faces the main surface of the first scroll member in which the first magnet is embedded, and when viewed from the direction of the rotation axis, the first magnet includes a portion that overlaps with the second magnet.

11. A scroll fluid machine as described in claim 5 or 6, wherein the first scroll member is rotatably provided with respect to the housing and revolves with respect to the second scroll member, and the second scroll member is fixed with respect to the housing.

12. A scroll fluid machine as described in claim 5 or 6, wherein the first scroll member is rotatably mounted relative to the housing and orbits relative to the second scroll member, and the second scroll member is rotatably mounted relative to the housing and orbits relative to the first scroll member.

13. A scroll fluid machine comprising: a first rotating scroll member including a spiral first wrap and rotating about a first rotation axis defined on a first rotating shaft; a second rotating scroll member including a spiral second wrap that cooperates with the first wrap to form a region for compressing or expanding gas, and rotating about a second rotation axis defined on a second rotating shaft and arranged eccentrically with respect to the first rotation axis; and a power transmission mechanism that transmits torque from one of the first rotating scroll member and the second rotating scroll member to the other while allowing for eccentricity of the first rotating scroll member and the second rotating scroll member, wherein the power transmission mechanism has a plurality of power transmission units, and the power transmission units include: a first magnetic force generating section provided on the first rotating scroll member and generating a first magnetic force; and a second magnetic force generating section provided on the second rotating scroll member, arranged with a gap between them and the first magnetic force generating section, and generating a second magnetic force that interferes with the first magnetic force.

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