Compressor and air conditioner

Abstract

To provide a compressor etc. which suppresses vibration.SOLUTION: A compressor 100 includes a sealed container 1, an electric motor 7, a crank shaft 3, a sub bearing 8, and a compression mechanism part 2 and further includes a stator holding part 9 which holds a stator 71 in a state that the stator 71 is spaced apart from the sealed container 1 in a radial direction. A plurality of grooves V1 parallel to an axial direction of the stator 71 are provided on an outer peripheral surface of the stator 71. The stator holding part 9 has: a plurality of fitting parts 912 which are fitted in at least three of the grooves V1; and a lower frame 93 which has a peripheral wall surface, having a shape corresponding to an inner peripheral surface of the sealed container 1, and is fixed to the sealed container 1 and further has a housing 92 which is provided between the fitting parts 912 and the lower frame 93 and houses the sub bearing 8. A relation among a diameter D1 of a circle including outer surfaces of the fitting parts 912, an outer diameter D2 of the housing 92, and an outer diameter D3 of the lower frame 93 is D3>D1>D2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a compressor and the like.

Background Art

[0002] As a compressor used in an air conditioner or the like, for example, the one described in Patent Document 1 is known. That is, Patent Document 1 describes a scroll compressor having a cylindrical stator holding portion that holds a stator.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the technique described in Patent Document 1, since the cylindrical stator holding portion is fixed to the outer peripheral surface of the stator, the contact area between the stator holding portion and the stator becomes large. As a result, electromagnetic vibration accompanying the driving of the motor propagates through the stator holding member, and there is a possibility that the lower bearing vibrates and noise is generated.

[0005] Therefore, an object of the present disclosure is to provide a compressor or the like that suppresses vibration.

Means for Solving the Problems

[0006] In order to solve the above-described problems, a compressor according to the present disclosure includes a sealed container, a motor installed inside the sealed container and having a stator and a rotor, a drive shaft that rotates integrally with the rotor, a bearing that rotatably supports the drive shaft, a compression mechanism unit that compresses a refrigerant as the drive shaft rotates, and a stator holding unit that holds the stator in a state where the stator is radially separated from the sealed container. A plurality of grooves parallel to the axial direction of the stator are provided on the outer peripheral surface of the stator. The stator holding unit has a plurality of fitting portions that are fitted into at least three of the plurality of grooves, and a peripheral wall surface having a shape corresponding to the inner peripheral surface of the sealed container, and a fixing portion that is fixed to the sealed container. The stator holding unit also has an intermediate portion provided between the plurality of fitting portions and the fixing portion for accommodating the bearing. The relationship among the diameter D1 of a circle including the outer surfaces of the plurality of fitting portions, the outer diameter D2 of the intermediate portion, and the outer diameter D3 of the fixing portion is set to D3 > D1 > D2.

Advantages of the Invention

[0007] According to the present disclosure, it is possible to provide a compressor or the like in which vibration is suppressed.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Mode for Carrying Out the Invention

[0009] ≪First Embodiment≫ <Configuration of Compressor> FIG. 1 is a longitudinal sectional view of a compressor 100 according to the first embodiment. The compressor 100 shown in FIG. 1 is a scroll type compressor that compresses gaseous refrigerant. As shown in FIG. 1, the compressor 100 includes a hermetic container 1, a compression mechanism portion 2, a crankshaft 3 (drive shaft), a main bearing 4, a swivel bearing 5, and balance weights 61 and 62. Further, in addition to the above-described configuration, the compressor 100 includes an electric motor 7, an auxiliary bearing 8 (bearing), a stator holding portion 9, and an oil pump 10.

[0010] The hermetic container 1 is a container that houses the compression mechanism portion 2, the crankshaft 3, the electric motor 7, the stator holding portion 9, etc., and is substantially hermetically sealed. The hermetic container 1 includes a cylindrical cylinder chamber 1a, a lid chamber 1b that closes the upper opening of the cylinder chamber 1a, and a bottom chamber 1c that closes the lower opening of the cylinder chamber 1a. A suction pipe P1 is fixed to the lid chamber 1b of the hermetic container 1 in a state where it is inserted. The suction pipe P1 is a pipe that guides refrigerant to the suction chamber S1 of the compression mechanism portion 2.

[0011] In the cylindrical chamber 1a of the sealed container 1, a discharge pipe P2 is fixed in a state of being inserted. The discharge pipe P2 is a pipe that guides the refrigerant compressed by the compression mechanism unit 2 to the outside of the compressor 100. Lubricating oil is enclosed in the sealed container 1 and stored as an oil sump R1 at the bottom of the sealed container 1.

[0012] The compression mechanism unit 2 is a mechanism that compresses the refrigerant as the crankshaft 3 (drive shaft) rotates. The compression mechanism unit 2 includes a fixed scroll 21, a revolving scroll 22, an upper frame 23, and an oldham ring 24, and is disposed in the upper space inside the sealed container 1.

[0013] The fixed scroll 21 is a member that forms a compression chamber C1 together with the revolving scroll 22. The fixed scroll 21 is installed above the upper frame 23 and fixed to the upper frame 23 with a plurality of bolts. As shown in FIG. 1, the fixed scroll 21 includes a base plate 21a and a fixed wrap 21b.

[0014] The base plate 21a is a thick member having a circular shape in plan view. The base plate 21a is provided with a suction chamber S1. The suction chamber S1 is a space into which the refrigerant is introduced through the suction pipe P1. The fixed wrap 21b has a spiral shape and extends downward from the base plate 21a. Note that the lower surface of the portion of the base plate 21a outside the fixed wrap 21b and the tooth tips of the fixed wrap 21b are substantially flush.

[0015] The revolving scroll 22 is a member that forms a compression chamber C1 between itself and the fixed scroll 21 by its revolution. The revolving scroll 22 includes a disk-shaped mirror plate 22a, a spiral revolving wrap 22b erected on the mirror plate 22a, and a boss portion 22c fitted to the eccentric portion 3b of the crankshaft 3. As shown in FIG. 1, the revolving wrap 22b extends upward from the mirror plate 22a. On the other hand, the boss portion 22c extends downward from the mirror plate 22a.

[0016] Then, the spiral fixed wrap 21b and the spiral rotating wrap 22b mesh with each other, and a compression chamber C1 is formed between the fixed wrap 21b and the rotating wrap 22b. The compression chamber C1 is a space for compressing gaseous refrigerant, and is formed on each of the outer circumferential side and the inner circumferential side of the rotating wrap 22b. Near the center of the base plate 21a of the fixed scroll 21, a discharge port S2 for guiding the refrigerant compressed in the compression chamber C1 to the upper space in the sealed container 1 is provided. The refrigerant discharged through the discharge port S2 is guided to the lower side of the compression mechanism portion 2 through a predetermined gap (not shown) between the sealed container 1 and the compression mechanism portion 2.

[0017] The upper frame 23 is a member for supporting the fixed scroll 21 and fixing the main bearing 4, and has a generally rotationally symmetric shape. The upper frame 23 is fixed to the inner circumferential surface of the cylindrical chamber 1a and is fixed to the lower side of the fixed scroll 21 with bolts. The upper frame 23 is provided with an insertion hole (not shown in the figure) for the crankshaft 3.

[0018] The Oldham ring 24 is an annular member that receives the eccentric rotation of the eccentric portion 3b and rotates the orbiting scroll 22 without causing it to rotate on its own axis. The Oldham ring 24 is installed between the orbiting scroll 22 and the upper frame 23.

[0019] The crankshaft 3 (drive shaft) is a shaft that rotates integrally with the rotor 72 of the electric motor 7 and extends in the vertical direction. As shown in FIG. 1, the crankshaft 3 includes a main shaft portion 3a and an eccentric portion 3b extending upward from the main shaft portion 3a. The main shaft portion 3a is coaxially fixed to the rotor 72 of the electric motor 7 and rotates integrally with this rotor 72. The eccentric portion 3b is a shaft that rotates eccentrically with respect to the main shaft portion 3a, and as described above, is fitted into the boss portion 22c of the orbiting scroll 22. Then, as the eccentric portion 3b rotates eccentrically, the orbiting scroll 22 rotates. Inside the crankshaft 3, an oil supply passage 3c through which lubricating oil flows is provided in the axial direction.

[0020] The main bearing 4 rotatably supports the upper part of the main shaft portion 3a with respect to the upper frame 23. The main bearing 4 is fixed to the peripheral wall surface of the insertion hole (not shown in the figure) of the crankshaft 3 in the upper frame 23. In FIG. 1, an example in which a roller bearing is used as the main bearing 4 is shown, but other types of bearings such as sliding bearings and ball bearings may be used. The swivel bearing 5 rotatably supports the eccentric portion 3b with respect to the boss portion 22c of the swivel scroll 22 and is installed on the inner peripheral surface of the boss portion 22c. As such a swivel bearing 5, for example, a sliding bearing is used.

[0021] The balance weights 61 and 62 are members for suppressing the vibration of the compressor 100. One balance weight 61 is installed on the crankshaft 3. More specifically, the balance weight 61 is installed at a predetermined position between the compression mechanism portion 2 and the electric motor 7 on the crankshaft 3. The other balance weight 62 is installed below the rotor 72 of the electric motor 7. Then, with the drive of the electric motor 7, the balance weights 61 and 62 move together with the rotor 72 and the crankshaft 3.

[0022] The electric motor 7 is a drive source for rotating the crankshaft 3 and is installed inside the sealed container 1. As such an electric motor 7, for example, a permanent magnet synchronous motor is used, but other types of motors may be used. The electric motor 7 includes a stator 71 (stator) and a rotor 72 (rotor), and is installed between the compression mechanism portion 2 and the stator holding portion 9.

[0023] The stator 71 is held by a stator holding part 9 described later. Also, a predetermined gap G1 (see FIG. 6) in the radial direction is provided between the stator 71 and the sealed container 1. This suppresses the propagation of electromagnetic vibration associated with the driving of the electric motor 7 to the sealed container 1. A plurality of grooves V1 (also see FIG. 4) parallel to the axial direction of the stator 71 are provided on the outer peripheral surface of the stator 71 (specifically, the stator core 71a). These grooves V1 are configured to be recessed radially inward from the outer peripheral surface of the stator 71. And the high-pressure refrigerant between the sealed container 1 and the compression mechanism part 2 flows downward through the gap between the wall surface of the groove V1 and the sealed container 1.

[0024] As shown in FIG. 1, the stator 71 includes a stator core 71a, an insulator 71b, and a winding 71c. The stator core 71a is a cylindrical member formed by laminating electromagnetic steel sheets in the axial direction. The stator core 71a has a function as a yoke constituting a magnetic circuit. The insulator 71b is an insulating material around which the winding 71c is wound and is fitted into the teeth 712a (see FIG. 3) of the stator core 71a. And by being energized to a predetermined value through the winding 71c, a magnetic attractive force and repulsive force are generated between the stator 71 and the rotor 72, causing the rotor 72 to rotate.

[0025] The rotor 72 rotates around the central axis of the crankshaft 3. The rotor 72 has, for example, a configuration in which a plurality of permanent magnets are embedded in a cylindrical rotor core. The rotor 72 is rotatably arranged inside the stator 71 in the radial direction.

[0026] The auxiliary bearing 8 (bearing) rotatably supports the crankshaft 3 (drive shaft) and is provided at the lower part of the crankshaft 3. In FIG. 1, an example of using a ball bearing as the auxiliary bearing 8 is shown, but other types of bearings such as roller bearings and sliding bearings may also be used. The auxiliary bearing 8 is fixed to the inner peripheral surface of a housing 92 described later by press-fitting or the like.

[0027] The stator holding portion 9 holds the stator 71 in a state in which the stator 71 is radially spaced apart from the sealed container 1. As shown in Fig. 1, the stator holding portion 9 includes a holding member 91, a housing 92 (middle portion), and a lower frame 93 (frame, fixed portion).

[0028] The holding member 91 is a member that holds the stator 71 with a fitting portion 912 (see also FIG. 4) described below fitted into a groove V1 (see FIG. 4) of the stator 71. The housing 92 is fixed to the holding member 91 with the sub-bearing 8 housed therein. The lower frame 93 is fixed to the housing 92 and is also fixed to the sealed container 1. The holding member 91, the housing 92, and the lower frame 93 will be described in detail later.

[0029] The oil pump 10 is a non-positive displacement pump that pumps up lubricating oil, and is installed near the lower end of the crankshaft 3. In the example of FIG. 1, the oil pump 10 is fixed to the lower side of the housing 92 with bolts B2. As the electric motor 7 is driven, the lubricating oil pumped up by the oil pump 10 rises through the oil supply passage 3c of the crankshaft 3. This lubricates the compression mechanism 2 as well as the main bearing 4, the swivel bearing 5, and the sub-bearing 8.

[0030] FIG. 2 is a perspective view of the holding member 91. As shown in FIG. The holding member 91 is a metal member for holding the stator 71 (see Figs. 1 and 5), and is made of a highly rigid material such as cast iron. As shown in Fig. 2, the holding member 91 includes an annular portion 911, three fitting portions 912, and three connecting portions 913, which are integrally formed.

[0031] The annular portion 911 is a portion that fixes the relative positions of the connecting portion 913 and the fitting portion 912, and has an annular shape in a plan view. The housing 92 (see FIG. 1) is fitted from below into a circular hole H1 of the annular portion 911. The annular portion 911 is provided radially inward from the outer surfaces of the connecting portion 913 and the fitting portion 912. The refrigerant flows through a gap between the annular portion 911 and the sealed container 1.

[0032] The fitting portion 912 is a portion that is fitted into the groove V1 (see FIG. 5) of the stator 71 (see FIG. 5), and extends upward from the connection portion 913. In the example of FIG. 2, one fitting portion 912 is provided for each of the three connection portions 913. Furthermore, the three fitting portions 912 are provided at equal intervals in the circumferential direction.

[0033] The outer surface of the fitting portion 912 (the surface facing the inner circumferential surface of the sealed container 1: see FIG. 1) is arc-shaped in plan view. The center of curvature of the arc is located at substantially the same position as the center of the annular portion 911. The outer surface of the fitting portion 912 is flush with the outer circumferential surface of the stator 71 (see FIG. 3). The shape of the inner surface of the fitting portion 912 (the surface contacting the wall surface of the groove V1: see FIG. 5) corresponds to the wall surface of the groove V1. That is, the cross-sectional shape of the transverse section of the fitting portion 912 (see FIG. 3) corresponds to the shape of the groove V1 (see FIG. 5) of the stator 71 (see FIG. 5). Each fitting portion 912 is fitted into the groove V1.

[0034] The connection portion 913 is a portion that connects each of the fitting portions 912 and the annular portion 911, and extends upward from the annular portion 911. In the example of FIG. 2, three connection portions 913 are provided at equal intervals in the circumferential direction. Each connection portion 913 includes a plate-shaped portion 913a and a thick portion 913b. The plate-shaped portion 913a has a thin rectangular plate shape and is arc-shaped in a plan view. The outer surface of the arc-shaped plate-shaped portion 913a is flush with the outer surface of the fitting portion 912. The plate-shaped portion 913a is connected to the lower side of the fitting portion 912 (one axial side of the stator 71: see FIG. 5) and abuts against the lower surface (end surface on one axial side) of the stator 71.

[0035] The length of the arc of the outer surface of the plate-shaped portion 913a, which is arc-shaped in a plan view, is longer than the length of the arc of the outer surface of the fitting portion 912. The fitting portion 912 is provided at the circumferential center of each connection portion 913. When the fitting portion 912 is fitted into the groove V1 (see FIG. 5) of the stator 71 (see FIG. 5), the plate-shaped portion 913a abuts against the lower surface of the stator 71. This restricts the up-down movement of the stator 71 (see FIG. 5) by the plate-shaped portion 913a.

[0036] The thick portion 913b is a portion that connects the plate-shaped portion 913a and the annular portion 911, and has a radial thickness that is thicker than that of the plate-shaped portion 913a. In the example of FIG. 2, the circumferential range of the thick portion 913b is the same as the circumferential range of the plate-shaped portion 913a. The thick portion 913b extends downward from the plate-shaped portion 913a, and is connected to the upper surface of the annular portion 911 and is also connected to the back side of the annular portion 911. The thick portion 913b and the lower surface of the annular portion 911 are flush with each other. In this way, since the thick portion 913b is provided at the base of the connection portion 913, the strength of the holding member 91 is increased. In addition, in the process in which the electromagnetic vibration of the stator 71 propagates downward through the fitting portion 912, the electromagnetic vibration can be sufficiently attenuated by the thick portion 912b.

[0037] In addition, when the holding member 91 is installed inside the sealed container 1 (see FIG. 1), the connection portion 913 and the fitting portion 912 are spaced a predetermined distance from the inner circumferential surface of the sealed container 1. This makes it possible to prevent the electromagnetic vibration of the stator 71 from being directly transmitted to the sealed container 1 (see FIG. 1) via the holding member 91.

[0038] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1, with the crankshaft, rotor, insulators, and windings omitted. First, the configuration of the stator core 71a will be briefly described. As shown in FIG. 3, the stator core 71a includes a yoke 711a having an annular cross section, and a plurality of (12 in the example of FIG. 3) teeth 712a extending radially inward from the yoke 711a. The yoke 711a is a cylindrical armature that forms part of the magnetic circuit. On the outer peripheral surface of the yoke 711a, at locations corresponding to the teeth 712a, one groove V1 parallel to the axial direction is provided for each.

[0039] The plurality of teeth 712a extend radially inward from the yoke 711a and are provided at equal intervals in the circumferential direction. The slot 713a is the space between adjacent teeth 712a and 711b in the circumferential direction. On the wall surfaces of these slots 713a, an insulator 71b (see FIG. 1) is installed.

[0040] As shown in FIG. 3, a radial gap G1 (not shown by a reference numeral in FIG. 3, see FIG. 6) is provided between the stator 71 and the sealed container 1. The dimension of this gap G1 is set to a length such that the stator 71 does not contact the sealed container 1 even when electromagnetic vibration occurs in the stator 71. Also, the fitting portion 912 of the holding member 91 is fitted into a predetermined groove V1. In the example of FIG. 3, among the 12 grooves V1, the fitting portion 912 is fitted into one of the three grooves V1 that are equally spaced in the circumferential direction.

[0041] More specifically, the plurality of fitting portions 912 are fitted into the groove V1 (see FIG. 5) of the stator 71 in the circumferential direction and are also fitted into the groove V1 in the radial direction. Here, the fact that the fitting portion 912 is "fitted into the groove V1 in the circumferential direction" means that the end faces on both sides in the circumferential direction of the fitting portion 912 are in contact with the wall surface of the groove V1. Also, the fact that the fitting portion 912 is "fitted into the groove V1 in the radial direction" means that the fitting portion 912 is in contact with the surface in the groove V1 where a radial force (including a component force) can be applied to the fitting portion 912.

[0042] In this way, since the fitting portion 912 is fitted into the groove V1 in the circumferential direction and the radial direction, it is possible to suppress the radial misalignment of the stator 71 and the holding member 91. Therefore, it is possible to suppress the vibration and noise of the compressor 100 associated with the misalignment of the axis.

[0043] As described above, the outer surfaces of the plurality of fitting portions 912 (the surfaces facing the inner circumferential surface of the sealed container 1) are flush with the outer circumferential surface of the stator 71. Note that the outer surfaces of the plurality of fitting portions 912 may be located radially inward of the outer circumferential surface of the stator 71. In any case, a predetermined gap can be provided between the sealed container 1 and the fitting portion 912. This can prevent the fitting portion 912 from contacting the sealed container 1 when electromagnetic vibration of the stator 71 occurs, while ensuring the maximum diameter of the stator 71.

[0044] FIG. 4 is an exploded perspective view of the compressor 100. In FIG. 4, the illustration of the sealed container 1 (see FIG. 1), the fixed scroll 21 (see FIG. 1), and the orbiting scroll 22 (see FIG. 1) is omitted. As shown in FIG. 4, the holding member 91 is disposed below the stator 71. And the three fitting portions 912 of the holding member 91 are fitted into the groove V1 on the outer circumferential surface of the stator 71 from below. When fitting and fixing the fitting portion 912 into the groove V1, press-fitting or shrink fitting may be performed.

[0045] Next, the housing 92 and the lower frame 93 that together with the holding member 91 constitute the stator holding portion 9 will be described. As shown in FIG. 4, the stator holding portion 9 has a configuration in which the holding member 91, the housing 92, and the lower frame 93 (frame) are assembled. The housing 92 is a metal member for supporting the holding member 91 and accommodating the auxiliary bearing 8 (see FIG. 1), and is disposed below the holding member 91. As shown in FIG. 4, the housing 92 includes a housing portion 92a and a plurality of convex portions 92b.

[0046] The housing part 92a is a part for housing the auxiliary bearing 8 (see Fig. 1), and generally has a rotationally symmetric shape. And the upper part of the housing part 92a in the housing 92 is fitted into the annular part 911 of the holding member 91 from below. When fixing the housing 92 to the holding member 91, for example, press-fitting or shrink-fitting is performed. Also, an oil pump 10 is installed below the housing part 92a.

[0047] The plurality of convex parts 92b of the housing 92 extend radially outward from the housing part 92a. Specifically, six convex parts 92b are provided at equal intervals in the circumferential direction. Bolt insertion holes H2 are provided one by one in these convex parts 92b.

[0048] The lower frame 93 is a metal member fixed to the housing 92 and also fixed to the sealed container 1 (see Fig. 1). The lower frame 93 includes an annular part 93a and a plurality of convex parts 93b. The annular part 93a is a part fixed to the sealed container 1 (see Fig. 1) and has an annular shape in plan view.

[0049] The plurality of convex parts 93b extend radially inward from the annular part 93a. In the example of Fig. 4, six convex parts 93b are provided at equal intervals in the circumferential direction. Bolt insertion holes H3 are provided one by one in these convex parts 93b. And with the convex parts 93b of the lower frame 93 overlapped on the upper side of the convex parts 92b of the housing 92, the bolt B1 is inserted from below through the insertion holes H2 and H3 in sequence (see Fig. 1 as well). Thereby, the axial centers of the housing 92 and the stator 71 can be aligned (so-called centering is performed). Therefore, vibrations associated with the axial misalignment of the compressor 100 can be suppressed.

[0050] Note that there are circumferential gaps between the convex portions 92b and 93b (a total of six sets) stacked in the vertical direction. Compressed refrigerant flows through these gaps. Further, bolt tightening may be performed with a vibration isolation member (not shown), such as a rubber sheet, sandwiched between the housing 92 and the lower frame 93. As a result, since the vibration is attenuated by the vibration isolation member, it is possible to suppress the propagation of vibration to the sealed container 1 (see FIG. 1) through the lower frame 93.

[0051] FIG. 5 is a perspective view of a state in which the holding member 91 and the like are assembled. Note that in FIG. 5, the illustration of the cylindrical chamber 1a (see FIG. 1) and the bottom chamber 1c (see FIG. 1) is omitted, but the lid chamber 1b and the suction pipe P1 are illustrated. As shown in FIG. 5, when the holding member 91 is assembled to the stator 71, the upper end of the connecting portion 913 abuts (or is close to) a part of the lower surface of the stator core 71a. Further, the axial length of the fitting portion 912 is shorter than the axial length of the stator 71. Thereby, while suppressing the contact area between the fitting portion 912 and the stator 71 from becoming unnecessarily wide, the stator 71 can be held by the fitting portion 912.

[0052] FIG. 6 is an explanatory view regarding the outer diameters of the respective parts in the stator holding portion 9. Note that in FIG. 6, the stator 71, the rotor 72, the stator holding portion 9, and the sealed container 1 are illustrated, and other illustrations are omitted. Further, in FIG. 6, for the sake of explanation of the outer diameters D1, D2, and D3 of the respective parts of the stator holding portion 9, each configuration is illustrated in a simplified manner. As shown in FIG. 6, the stator holding portion 9 includes a holding member 91 including a plurality of fitting portions 912, and also includes a housing 92 and a lower frame 93 (frame).

[0053] In such a configuration, the lower frame 93 has a peripheral wall surface having a shape corresponding to the inner peripheral surface of the sealed container 1, and functions as a "fixed portion" fixed to the sealed container 1. Further, the housing 92 is provided between the plurality of fitting portions 912 and the lower frame 93 (fixed portion), and functions as an "intermediate portion" that houses the sub-bearing 8 (bearing).

[0054] In the first embodiment, a case where the holding member 91, the housing 92 (intermediate portion), and the lower frame 93 are separate bodies will be described. However, as will be described later, they may be integrally formed. Here, the outer diameter D1 shown in FIG. 6 will be described with reference to FIG. 7.

[0055] FIG. 7 is an explanatory diagram regarding the outer diameter D1 of a predetermined circle E1. As described above, the outer surfaces of the plurality of fitting portions 912 (see also FIG. 3) are arc-shaped. In such a configuration, the diameter of a virtual circle E1 including the arc-shaped outer surfaces of the plurality of fitting portions 912 is defined as D1. Note that the position of the center Q1 of the circle E1 substantially coincides with the position of the central axis of the stator 71 (see FIG. 1) and the rotor 72 (see FIG. 1).

[0056] Returning to FIG. 6 again, the description will be continued. As shown in FIG. 6, the outer diameter of the housing 92 (intermediate portion) is defined as D2. Specifically, the outer diameter of the cylindrical housing portion 92a (see FIG. 4) in the housing 92 is defined as D2. When the outer diameter of the housing portion 92a is not uniform in the axial direction, the value at the location where the outer diameter is the shortest in the housing portion 92a is defined as D2. Also, the outer diameter of the lower frame 93 (fixed portion) is defined as D3. When the outer diameter of the lower frame 93 is not uniform in the axial direction, the value at the location where the outer diameter is the longest in the lower frame 93 is defined as D3.

[0057] Then, the relationship among the diameter D1 of the circle including the outer surfaces of the plurality of fitting portions 912, the outer diameter D2 of the housing 92 which is the "intermediate portion", and the outer diameter D3 of the lower frame 93 which is the "fixed portion" is D3 > D1 > D2. According to such a configuration, compared with the case where the shape of the stator holding portion 9 is linear in the height direction, the length of the path when vibration propagates through the stator holding portion 9 becomes longer. Therefore, vibration is likely to be attenuated in the process of vibration propagation through the stator holding portion 9. That is, when the vibration reaches the sealed container 1, since the vibration is in a considerably attenuated state, the vibration of the compressor 100 (see FIG. 1) accompanying the driving of the motor 7 can be suppressed.

[0058] Further, in a state where the stator holding portion 9 is assembled, the holding member 91 and the lower frame 93 are separated in the vertical direction (see also FIG. 1). Therefore, it is possible to prevent the vibration before attenuation from directly propagating from the holding member 91 to the lower frame 93.

[0059] FIG. 8 shows a simulation result indicating the distribution of magnetic flux density in the electric motor 7. Note that FIG. 8 shows magnetic flux lines of the stator 71 and the rotor 72. Since the magnetic flux density is high at locations where the magnetic flux lines are dense, in the example of FIG. 8, the magnetic flux density is high at four locations indicated by arrow A1. As shown in FIG. 8, eight permanent magnets 72a are embedded in the rotor 72 at equal intervals in the circumferential direction. Further, slots 713a (reference numerals not shown, see FIG. 3) are provided at 12 locations. That is, the electric motor 7 is configured as a permanent magnet synchronous motor with 8 poles and 12 slots. Also, it is assumed that a three-phase AC voltage is applied through the winding 71c of the electric motor 7. Note that the winding method of the winding 71c may be concentrated winding or distributed winding.

[0060] In the electric motor 7, the magnetic flux density periodically increases at the location of "the number obtained by dividing the number of slots of the stator by the number of phases of the drive voltage of the electric motor". In the example of FIG. 8, since the number of slots of the stator 71 is "12" and the "number of phases of the drive voltage" is "3", the "number obtained by dividing the number of slots of the stator by the number of phases of the drive voltage" is "4". As shown by arrow A1 in FIG. 8, the magnetic flux density is high at four locations with equal circumferential intervals. Since the magnetic attractive force and repulsive force are strong at locations where the magnetic flux density is high, electromagnetic vibration tends to occur at these locations. Note that during the drive of the electric motor 7, the distribution of the magnetic flux density shown in FIG. 8 changes moment by moment so as to rotate in the circumferential direction.

[0061] On the other hand, the stator 71 is held at three locations by the fitting portions 912 of the holding member 91. Then, the number of fitting portions 912 is different with respect to "an integral multiple of the value obtained by dividing the number of slots of the stator by the number of phases of the drive voltage" (in the example of FIG. 8, 4, 8, 12,...). Here, the above-mentioned "integral multiple" shall include the case where the integer is "1".

[0062] According to such a configuration, since there is no particular situation where the magnetic flux density becomes high at all installation locations of the fitting portion 912, resonance between the stator 71 and the holding member 91 can be suppressed. As a result, vibration of the compressor 100 (see FIG. 1) associated with driving of the motor 7 (see FIG. 1) can be suppressed.

[0063] <Effect> According to the first embodiment, the stator 71 (see FIG. 1) is held by the stator holding portion 9 in a state of being separated from the sealed container 1. Therefore, it is possible to prevent the electromagnetic vibration of the stator 71 from directly propagating to the sealed container 1. Further, since the stator holding portion 9 is also separated from the sealed container 1, it is possible to prevent the vibration of the stator holding portion 9 from directly propagating to the sealed container 1. Thereby, vibration and noise of the compressor 100 can be suppressed.

[0064] Further, the relationship between the diameter D1 of the circle E1 (see FIG. 7) including the outer surface of the fitting portion 912, the outer diameter D2 of the housing 92, and the outer diameter D3 of the lower frame 93 is D3 > D1 > D2 (see FIG. 6). Thereby, compared with the case where the stator holding portion 9 is linear, the length of the path when electromagnetic vibration propagates through the stator holding portion 9 becomes longer. Thereby, electromagnetic vibration can be sufficiently attenuated in the stator holding portion 9.

[0065] Further, the stator holding portion 9 has a configuration in which the holding member 91, the housing 92, and the lower frame 93 are assembled. Therefore, for example, even when deformation due to press-fitting or welding heat occurs in the lower frame 93 when the lower frame 93 is installed in the cylindrical chamber 1a, deformation of the separately provided housing 92 and holding member 91 can be suppressed. Further, when the housing 92 is fixed to the holding member 91 with bolts, the axial center can be aligned using a predetermined jig. Thereby, vibration and noise of the compressor 100 associated with axial misalignment can be suppressed.

[0066] Also, the number of fitting portions 912 is different for "an integral multiple of the value obtained by dividing the number of slots of the stator by the number of phases of the drive voltage". Thereby, it is possible to suppress resonance from occurring between the stator 71 and the holding member 91.

[0067] <<Second Embodiment>> In the second embodiment, the shape of the fitting portion 912A (see FIG. 9) of the holding member 91A (see FIG. 9) is different from that of the first embodiment, but other points are the same as those of the first embodiment. Therefore, parts different from the first embodiment will be described, and descriptions of overlapping parts will be omitted.

[0068] FIG. 9 is a perspective view of a holding member 91A of a compressor according to the second embodiment. As shown in FIG. 9, the holding member 91A includes an annular portion 911, a fitting portion 912A, and a connecting portion 913. The fitting portion 912A is a portion that is fitted into the groove V1 (see FIG. 5) of the stator 71 (see FIG. 5) and extends upward from the connecting portion 913. The fitting portion 912A has a thin plate shape and has an arc shape in a plan view. The central positions of the arcs of the three fitting portions 912A having such an arc shape are substantially the same as the central position of the annular portion 911. As shown in FIG. 9, the outer surface of the fitting portion 912A is flush with the outer surface of the connecting portion 913. Also, the thickness of the fitting portion 912A is uniform in the circumferential direction.

[0069] FIG. 10 is a view in which the crankshaft, rotor, insulator, and winding are omitted from a cross-section of the compressor. Note that the position of the cross-section shown in FIG. 10 corresponds to the line III-III in FIG. 1 in the first embodiment. As shown in FIG. 10, in a state where the fitting portion 912A is fitted into the groove V1 of the stator 71, the outer surface of the fitting portion 912A is substantially flush with the outer peripheral surface of the stator 71. Also, a radial gap is provided between the fitting portion 912A and the stator 71 (the wall surface of the groove V1). That is, the plurality of fitting portions 912A are fitted into the groove V1 of the stator 71 in the circumferential direction and are radially spaced apart from the wall surface of this groove V1.

[0070] Thus, in the second embodiment, the fitting portion 912A contacts the stator 71 in the circumferential direction while not contacting the stator 71 in the radial direction. As a result, the radial stress acting on the holding member 91A from the stator 71 can be reduced. As a result, the radial deformation of the stator 71 is suppressed, so that the gap between the stator 71 and the rotor 72 (see FIG. 1) can be made substantially uniform over the entire circumference.

[0071] In addition, the electromagnetic vibration of the stator 71 has vibration components in both the radial and circumferential directions. However, compared with the circumferential vibration component, the radial vibration component has a greater influence on the vibration of the compressor. As described above, in the second embodiment, since the fitting portion 912A is separated from the stator 71 in the radial direction, it is possible to particularly suppress the propagation of the radial electromagnetic vibration of the stator 71 through the holding member 91A.

[0072] <Effect> According to the second embodiment, the fitting portion 912A is fitted into the groove V1 of the stator 71 in the circumferential direction and is separated from the wall surface of the groove V1 in the radial direction. As a result, the radial stress acting on the holding member 91A from the stator 71 can be reduced, the vibration caused by the non-uniformity of the gap between the stator 71 and the rotor 72 can be suppressed, and the efficiency of the motor 7 can be increased. In addition, it is possible to suppress the propagation of the radial electromagnetic vibration of the stator 71 through the holding member 91A.

[0073] ≪First Modification≫ The first modification is different from the first embodiment in that two fitting portions 912 (see FIG. 11) are provided in one connection portion 913B (see FIG. 11) of the holding member 91B (see FIG. 11). Note that other points are the same as those in the first embodiment. Therefore, the parts different from the first embodiment will be described, and the description of the overlapping parts will be omitted.

[0074] FIG. 11 is a perspective view of a holding member 91B of a compressor according to the first modification. As shown in Fig. 11, the holding member 91B includes an annular portion 911, a connecting portion 913B, and a fitting portion 912. The connecting portion 913B is a portion that supports the fitting portion 912, and extends upward from the annular portion 911. In the example of Fig. 11, three connecting portions 913B are provided at equal intervals in the circumferential direction. Each connecting portion 913B includes one plate-shaped portion 913Ba and one thick portion 913Bb.

[0075] The plate-shaped portion 913Ba is a thin plate-like portion and has an arc shape in a plan view. The length of the arc when the plate-shaped portion 913Ba is viewed in a plan view is set to a length such that the plate-shaped portion 913Ba straddles two of the multiple grooves V1 (see FIG. 5) of the stator 71. The thick portion 913Bb is a portion that connects the plate-shaped portion 913Ba and the annular portion 911, and has a greater radial thickness than the plate-shaped portion 913Ba.

[0076] The fitting portion 912 is a portion that is fitted into the groove V1 (see FIG. 5) of the stator 71 (see FIG. 5), and extends upward from the connection portion 913B. In the example of FIG. 11, two fitting portions 912 are provided in one connection portion 913B. These two fitting portions 912 are fitted into two predetermined grooves V1 that are adjacent to each other in the circumferential direction among the multiple grooves V1 (see FIG. 5) of the stator 71. With this configuration, the strength and vibration damping effect of the connection portion 913B are improved compared to the configuration of the first embodiment (see FIG. 2). The number of fitting portions 912 provided in one connection portion 913B may be three or more.

[0077] <Second modified example> The second modified example differs from the first modified example in that the upper part of the plate-shaped part 913Ca (see FIG. 12) of the holding member 91C (see FIG. 12) is fitted into the groove V1 (see FIG. 12) and the notch M1 (see FIG. 12) on the outer peripheral surface of the stator 71. Other points are the same as those of the first modified example. Therefore, only the parts that differ from the first modified example will be described, and a description of the overlapping parts will be omitted.

[0078] FIG. 12 is a perspective view of a state in which a holding member 91C and the like of a compressor 100C according to a second modification are assembled. As shown in FIG. 12, a plurality of grooves V1 parallel to the axial direction are provided on the outer peripheral surface of the stator 71C. Further, the connecting portion 913C of the holding member 91C includes a plate-shaped portion 913Ca and a thick portion 913Cb. The plate-shaped portion 913Ca is connected to the annular portion 911 via the thick portion 913Cb. On the outer peripheral surface of the stator 71, a notch M1 is formed in a shape that fits with the upper portion of the plate-shaped portion 913Ca in a state where the fitting portion 912 is fitted into a predetermined groove V1. Then, the upper portion of the plate-shaped portion 913Ca is fitted into the groove V1 and the notch M1 on the outer peripheral surface of the stator 71.

[0079] In a state where the holding member 91C is installed on the stator 71, the outer peripheral surface of the stator 71, the outer surfaces of the fitting portion 912 and the plate-shaped portion 913Ca are flush. The upper end of the plate-shaped portion 913Ca abuts against the wall surface of the notch M1, and the upper side surfaces on both sides also abut against the wall surface of the notch M1. With such a configuration, an appropriate contact area between the holding member 91C and the stator 71 is ensured, so that the stator 71 can be firmly fixed by the holding member 91C.

[0080] <<Third Embodiment>> In the third embodiment, an air conditioner W1 (see FIG. 13) including the compressor 100 (see FIG. 1) having the configuration described in the first embodiment will be described. Since the configuration of the compressor 100 is the same as that in the first embodiment, the description thereof will be omitted.

[0081] FIG. 13 is a configuration diagram of an air conditioner W1 according to the third embodiment. Note that the solid arrows in FIG. 13 indicate the flow of the refrigerant in the heating cycle. Also, the broken arrows in FIG. 13 indicate the flow of the refrigerant in the cooling cycle. The air conditioner W1 is a device that performs air conditioning such as cooling operation and heating operation. As shown in FIG. 13, as a configuration provided in the outdoor unit U1, the air conditioner W1 includes a compressor 100, an outdoor heat exchanger 81, an outdoor fan 82, an expansion valve 83, and a four-way valve 84. Further, as a configuration provided in the indoor unit U2, the air conditioner W1 includes an indoor heat exchanger 85 and an indoor fan 86.

[0082] The compressor 100 is a device that compresses a low-temperature and low-pressure gas refrigerant and discharges it as a high-temperature and high-pressure gas refrigerant, and has the same configuration as that of the first embodiment (see FIG. 1). Although not shown in FIG. 13, an accumulator for separating the refrigerant into gas and liquid is connected to the suction side of the compressor 100.

[0083] The outdoor heat exchanger 81 is a heat exchanger in which heat exchange occurs between the refrigerant flowing through its heat transfer tubes and the outside air sent from the outdoor fan 82. The outdoor fan 82 is a fan that sends outside air into the outdoor heat exchanger 81. The outdoor fan 82 has an outdoor fan motor 82a as a drive source and is installed near the outdoor heat exchanger 81.

[0084] The expansion valve 83 is a valve that reduces the pressure of the refrigerant condensed in the "condenser" (one of the outdoor heat exchanger 81 and the indoor heat exchanger 85). The refrigerant whose pressure has been reduced by the expansion valve 83 is led to the "evaporator" (the other of the outdoor heat exchanger 81 and the indoor heat exchanger 85). The indoor heat exchanger 85 is a heat exchanger in which heat exchange occurs between the refrigerant flowing through its heat transfer tubes (not shown) and the indoor air (the air in the air-conditioned room) sent from the indoor fan 86. The indoor fan 86 is a fan that sends indoor air into the indoor heat exchanger 85. The indoor fan 86 includes an indoor fan motor 86a as a drive source and is installed near the indoor heat exchanger 85.

[0085] The four-way valve 84 is a valve that switches the refrigerant flow path according to the operating mode of the air conditioner W1. For example, during cooling operation (refer to the dashed arrow in FIG. 13), the refrigerant circulates sequentially through the compressor 100, the outdoor heat exchanger 81 (condenser), the expansion valve 83, and the indoor heat exchanger 85 (evaporator). Also, during heating operation (refer to the solid arrow in FIG. 13), the refrigerant circulates sequentially through the compressor 100, the indoor heat exchanger 85 (condenser), the expansion valve 83, and the outdoor heat exchanger 81 (evaporator). And the air that has exchanged heat with the refrigerant flowing through the indoor heat exchanger 85 is blown out from the indoor unit U2 into the air-conditioned room.

[0086] <Effect> According to the third embodiment, the air conditioner W1 includes the compressor 100 (refer to FIG. 1) having the same configuration as that of the first embodiment. As a result, an air conditioner W1 capable of reducing the vibration and noise of the compressor 100 can be provided.

[0087] ≪Modification Example≫ As described above, the compressor 100 and the air conditioner W1 according to the present disclosure have been described in each embodiment, but the present disclosure is not limited to these descriptions and various modifications can be made. For example, in the first embodiment, the case where the number of the fitting portions 912 (refer to FIG. 2) is three has been described, but the present disclosure is not limited thereto, and the number may be four or more. That is, the fitting portions 912 may be fitted into at least three of the plurality of grooves V1 of the stator 71. Even with such a configuration, the same effects as those of the first embodiment can be achieved. The same applies to the second embodiment and the like.

[0088] In the first embodiment, the case where the electric motor 7 is a permanent magnet synchronous motor with 8 poles and 12 slots has been described, but the present invention is not limited to this. That is, the number of poles of the rotor 72 of the electric motor 7 may be 6 poles or more, and the number of slots of the stator 71 may be 9 slots or more. In this case, the upper limit of the number of poles may be 24 poles, and the upper limit of the number of slots may be 24 slots. Note that as the number of poles and slots increases, the number of locations where electromagnetic vibration occurs in the radial direction of the stator 71 increases, so the electromagnetic vibration tends to become complex. In the first embodiment, as described above, the fitting portion 912 is fitted into the groove V1 of the stator 71, and since it is a configuration in which electromagnetic vibration in the radial direction of the stator 71 is difficult to propagate, vibration and noise of the compressor 100 can be suppressed. Also, when the winding 71c of the stator 71 is a concentrated winding, the electromagnetic vibration of the stator 71 tends to be larger than that of a distributed winding. However, even in such a configuration, the propagation of electromagnetic vibration can be appropriately suppressed by the stator holding portion 9. The same applies to the second embodiment and the like.

[0089] In each embodiment, the case where the holding member 91 is fixed to the stator 71 by press-fitting or shrink-fitting has been described, but the present invention is not limited to this. For example, the holding member 91 may be fixed to the stator 71 by welding. In each embodiment, the case where the number of fitting portions 912 is different with respect to "an integer multiple of the value obtained by dividing the number of slots of the stator by the number of phases of the drive voltage" has been described, but the present invention is not limited to this. For example, "an integer multiple of the value obtained by dividing the number of slots of the stator by the number of phases of the drive voltage" and the number of fitting portions 912 may be made equal. Even in such a configuration, the vibration associated with resonance between the stator 71 and the fitting portion 912 can be attenuated by the holding member 91.

[0090] In each embodiment, the configuration in which the stator holding portion 9 supports the stator 71 from below has been described, but the present invention is not limited to this. For example, the upper frame 23, a housing (not shown), and a holding member (not shown) may be assembled in a predetermined manner to form the stator holding portion. Even in such a configuration, the propagation of electromagnetic vibration of the stator 71 can be suppressed.

[0091] Also, in each embodiment, a configuration including the holding member 91 of the stator holding portion 9, the housing 92 (intermediate portion), and the lower frame 93 (fixed portion) has been described, but a plurality of these members may be integrally formed. For example, the holding member 91 and the housing 92 may be integrally formed. Also, the housing 92 and the lower frame 93 may be integrally formed. Further, the holding member 91, the housing 92, and the lower frame 93 may be integrally formed.

[0092] Also, in each embodiment, a case where the outer surfaces of the plurality of fitting portions 912 are flush with the outer peripheral surface of the stator 71 (or are located radially inward of the outer peripheral surface of the stator 71) has been described, but it is not limited to this. For example, a configuration may be adopted in which the outer surfaces of the plurality of fitting portions 912 slightly protrude radially outward from the outer peripheral surface of the stator 71.

[0093] Also, each embodiment can be appropriately combined. For example, the second embodiment and the third embodiment may be combined, and in the compressor 100 of the air conditioner W1 (third embodiment: see FIG. 13), a configuration may be adopted in which the fitting portion 912A is radially spaced apart from the wall surface of the groove V1 of the stator 71 (second embodiment: see FIG. 10). In addition, various combinations are possible including the first modification and the second modification.

[0094] Also, in each embodiment, a case where the type of the compressor 100 is a scroll type has been described, but it is not limited to this. That is, each embodiment is applicable to other types of compressors such as a rotary type or a swing type.

[0095] Also, in the third embodiment, a configuration in which the air conditioner W1 (see FIG. 13) includes the four-way valve 84 has been described, but it is not limited to this. That is, the four-way valve 84 may be omitted, and an air conditioner dedicated to cooling or heating may be used. In addition, the air conditioner W1 (see FIG. 13) described in the third embodiment can be applied not only to room air conditioners but also to various types of air conditioners such as package air conditioners and multi-air conditioners for buildings.

[0096] In the third embodiment, the air conditioner W1 (see FIG. 13) including the compressor 100 has been described, but it is not limited thereto. For example, the third embodiment can also be applied to other refrigeration cycle devices such as refrigerators, water heaters, air-conditioning and hot water supply devices, and refrigerators.

[0097] Each embodiment has been described in detail for the purpose of clearly explaining the present disclosure, and is not necessarily limited to those having all the configurations described. In addition, for a part of the configuration of each embodiment, addition, deletion, and replacement of other configurations can be appropriately performed. In addition, the mechanisms and configurations described above show those considered necessary for explanation, and not all mechanisms and configurations are necessarily shown in the product.

Explanation of Reference Numerals

[0098] 1 Sealed container 2 Compression mechanism section 3 Crankshaft (drive shaft) 4 Main bearing 5 Swivel bearing 7 Electric motor 8 Sub-bearing (bearing) 9 Stator holding section 71 Stator 72 Rotor 81 Outdoor heat exchanger 82 Outdoor fan 83 Expansion valve 84 Four-way valve 85 Indoor heat exchanger 86 Indoor fan 91, 91A, 91B, 91C Holding members 92 Housing (intermediate section) 93 Lower frame (fixed section, frame) 100 Compressor 911 Annular section 912, 912A Fitting sections 913, 913B, 913C Connection part 913a, 913Ca Plate-like part 913b, 913Cb Thick part G1 Gap H1 Hole M1 Notch V1 Groove

Claims

1. A sealed container, a motor installed inside the sealed container and having a stator and a rotor, a drive shaft that rotates integrally with the rotor, a bearing that rotatably supports the drive shaft, a compression mechanism section that compresses a refrigerant as the drive shaft rotates, a stator holding section that holds the stator in a state where the stator is radially separated from the sealed container, and includes: a plurality of grooves parallel to the axial direction of the stator are provided on the outer peripheral surface of the stator, the stator holding section a plurality of fitting portions that are fitted into at least three of the plurality of grooves, has a peripheral wall surface having a shape corresponding to the inner peripheral surface of the sealed container, and a fixing portion fixed to the sealed container, and is provided between the plurality of fitting portions and the fixing portion, and has an intermediate portion that houses the bearing, A compressor, in which the relationship between the diameter D1 of a circle including the outer surfaces of the plurality of fitting portions, the outer diameter D2 of the intermediate portion, and the outer diameter D3 of the fixing portion is D3 > D1 > D2.

2. The stator holding section has a configuration in which a holding member including the plurality of fitting portions, a housing that is the intermediate portion, and a frame that is the fixing portion are assembled. The compressor according to claim 1, characterized in that.

3. The holding member has the plurality of fitting portions, and an annular portion having a hole into which the housing is fitted, and has a connecting portion that connects each of the fitting portions and the annular portion. The compressor according to claim 2, characterized in that.

4. The connecting portion has a plate-like portion that continues to one axial side of the stator with respect to the fitting portion and abuts against an end surface on one axial side of the stator, and connects the plate-like portion and the annular portion, and has a thick portion having a radial thickness thicker than that of the plate-like portion. The compressor according to claim 3, characterized in that.

5. The plurality of fitting portions are fitted into the grooves of the stator in the circumferential direction and are also fitted into the grooves in the radial direction. The compressor according to claim 1, characterized in that.

6. The plurality of fitting portions are fitted into the grooves of the stator in the circumferential direction and are radially spaced apart from the wall surface of the grooves. The compressor according to claim 1, characterized in that.

7. The outer surfaces of the plurality of fitting portions are flush with the outer peripheral surface of the stator or are located radially inside the outer peripheral surface of the stator. The compressor according to claim 1, characterized in that.

8. The number of fitting portions is different for an integral multiple (the integer includes 1) of the value obtained by dividing the number of slots of the stator by the number of phases of the drive voltage of the electric motor. The compressor according to claim 1, characterized in that.

9. The number of magnetic poles of the rotor is 6 poles or more, The number of slots of the stator is 9 slots or more The compressor according to claim 1, characterized in that.

10. A compressor according to any one of claims 1 to 9, and An air conditioner comprising an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger.

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