Compressor and refrigeration device

Abstract

To protect a fixing portion that fixes a neutral conductor from working fluid flowing around a stator core.SOLUTION: A compressor (10) includes a compression mechanism (30) and a motor (60) that drives the compression mechanism. A stator core (70) of the motor includes a back yoke (71) that is annular and extends in an axial direction, and first teeth (72A) and second teeth (72B) that protrude radially inward from an inner peripheral surface (71a) of the yoke and are spaced apart from each other in a circumferential direction. A core cut (73) that extends in the axial direction and is recessed radially inward is provided on the outer peripheral surface of the yoke. A first-phase coil (80A) is wound around the first teeth. A second-phase coil (80B) is wound around the second teeth. A first-phase neutral wire (82A) is drawn from the first phase coil. A second-phase neutral wire (82B) is drawn from the second phase coil. A fixing portion (83) that fixes the first-phase neutral wire and the second-phase neutral wire is disposed at a position that does not overlap the core cut in the circumferential direction and is disposed radially outward from the inner peripheral surface of the yoke.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present disclosure relates to a compressor and a refrigeration device. [Background technology]

[0002] The compressor disclosed in Patent Document 1 includes a compression mechanism and a motor that drives the compression mechanism. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-017849 Summary of the Invention [Problem to be solved by the invention]

[0004] In the compressor according to Patent Document 1, a core cut extending in the axial direction is provided on the outer peripheral surface of the stator core of the motor. The working fluid compressed by the compression mechanism flows from the compression mechanism side to the motor side inside the casing. At this time, the working fluid flows in the axial direction between the casing and the stator core along the core cut. Furthermore, the working fluid may flow along the inner peripheral side of the stator core in the axial direction.

[0005] A plurality of coils are arranged in the stator core. A neutral wire is drawn from each coil. The neutral wires drawn from each coil are fixed to each other at a fixing portion.

[0006] If the fixing parts that secure the neutral wires to each other are exposed to the working fluid flowing axially along the core cut or the working fluid flowing axially around the inner circumference of the stator core, the fixing of the neutral wires by the fixing parts may be released or the fixing parts may fall off from the stator core.

[0007] An object of the present disclosure is to protect a fixing portion that fixes neutral wires together in a compressor from the working fluid flowing around the stator core. [Means for solving the problem]

[0008] A first aspect of the present disclosure is directed to a compressor (10). The compressor (10) includes a compression mechanism (30) and a motor (60) that drives the compression mechanism (30), the motor (60) has a stator core (70), the stator core (70) includes a back yoke (71) that is annular and extends in an axial direction (Z), and first teeth (72A) and second teeth (72B) that protrude inward (R1) in a radial direction (R) from a yoke inner peripheral surface (71a) of the back yoke (71) and are arranged at intervals in a circumferential direction (T), and a yoke outer peripheral surface (71b) of the back yoke (71) is provided with a core cut (73) that extends in the axial direction (Z) and is recessed inward (R1) in the radial direction (R). A first phase coil (80A) is wound around the first tooth (72A) and a second phase coil (80B) is wound around the second tooth (72B). A first phase neutral wire (82A) is drawn out from the first phase coil (80A) and a second phase neutral wire (82B) is drawn out from the second phase coil (80B). The first phase neutral wire (82A) and the second phase neutral wire (82B) are fixed by a fixed portion (83). The fixed portion (83) is located at a position not overlapping the core cut (73) in the circumferential direction (T) and is located outward (R2) in the radial direction (R) from the yoke inner circumferential surface (71a).

[0009] According to the first aspect, the fixing portion (83) that fixes the first phase neutral conductor (82A) and the second phase neutral conductor (82B) is positioned at a position that does not overlap the core cut (73) in the circumferential direction (T) and is positioned radially outward (R2) from the yoke inner surface (71a) in the radial direction (R).

[0010] By positioning the fixing portion (83) in this range, the fixing portion (83) is less exposed to the working fluid flowing in the axial direction (Z) along the core cut (73) or the working fluid flowing in the axial direction (Z) radially inward (R1) than the yoke inner surface (71a).

[0011] In the compressor (10), the fixing portion (83) that fixes the first-phase neutral conductor (82A) and the second-phase neutral conductor (82B) can be protected from the working fluid flowing around the stator core (70).

[0012] A second aspect of the present disclosure is directed to the compressor (10) according to the first aspect. In the compressor (10), an insulator (90) is provided on a yoke end surface (71c) in the axial direction (Z) of the back yoke (71), the insulator (90) is annular and includes an outer circumferential wall (91) extending in the axial direction (Z), and the fixing portion (83) is disposed on the outer circumferential wall (91).

[0013] According to the second aspect, by arranging the fixing portion (83) on the outer peripheral wall (91) of the insulator (90), the fixing portion (83) can be easily positioned radially (R) outward (R2) from the yoke inner peripheral surface (71a) of the back yoke (71).

[0014] A third aspect of the present disclosure is directed to the compressor (10) according to the second aspect. In the compressor (10), the fixing portion (83) is arranged on an insulator outer peripheral surface (91a1, 91b1) of the outer peripheral wall (91).

[0015] The third aspect is more advantageous in positioning the fixing portion (83) outward (R2) in the radial direction (R) from the yoke inner peripheral surface (71a) of the back yoke (71).

[0016] A fourth aspect of the present disclosure is directed to the compressor (10) according to the second aspect. In the compressor (10), a notch (94) is formed in the outer peripheral wall (91), and the fixing portion (83) is disposed in the notch (94).

[0017] According to the fourth aspect, by forming the notch (94) in the outer peripheral wall (91) of the insulator (90), it becomes easy to arrange the fixing portion (83) on the outer peripheral wall (91) of the insulator (90).

[0018] A fifth aspect of the present disclosure is directed to the compressor (10) according to the second aspect. In the compressor (10), the fixing portion (83) is disposed on an insulator end surface (91b2) of the outer circumferential wall (91) in the axial direction (Z).

[0019] According to the fifth aspect, it becomes easy to dispose the fixing portion (83) on the outer peripheral wall (91) of the insulator (90).

[0020] A sixth aspect of the present disclosure is directed to the compressor (10) according to any one of the first to fifth aspects. In the compressor (10), a first phase lead wire (81A) is drawn out from the first phase coil (80A), a second phase lead wire (81B) is drawn out from the second phase coil (80B), and the first phase neutral wire (82A) and the second phase neutral wire (82B) are drawn out on the opposite side in the axial direction (Z) to the first phase lead wire (81A) and the second phase lead wire (81B).

[0021] According to the sixth aspect, interference between the first-phase neutral conductor (82A) and the second-phase neutral conductor (82B) and the first-phase lead conductor (81A) and the second-phase lead conductor (81B) can be suppressed, thereby facilitating the wiring of the first-phase neutral conductor (82A) and the second-phase neutral conductor (82B) and increasing the degree of freedom in layout of the fixed portion (83).

[0022] A seventh aspect of the present disclosure is directed to the compressor (10) according to the sixth aspect. The compressor (10) includes a terminal block (110) disposed closer to the first phase lead wire (81A) and the second phase lead wire (81B) in the axial direction (Z) than to the first phase neutral conductor (82A) and the second phase neutral conductor (82B).

[0023] According to the seventh aspect, the first phase lead wire (81A) and the second phase lead wire (81B) are close to the terminal block (110), which makes it easy to extend the first phase lead wire (81A) and the second phase lead wire (81B) to the terminal block (110).

[0024] An eighth aspect of the present disclosure is directed to the compressor (10) according to any one of the first to seventh aspects. The compressor (10) includes a first fixed portion (83A) and a second fixed portion (83B) as the fixed portion (83) arranged at different positions in the circumferential direction (T), and the first fixed portion (83A) and the second fixed portion (83B) are arranged at positions not overlapping the core cut (73) in the circumferential direction (T) and outward (R2) from the yoke inner peripheral surface (71a) in the radial direction (R).

[0025] According to the eighth aspect, the plurality of fixed portions (83) (the first fixed portion (83A) and the second fixed portion (83B)) can be protected from the working fluid flowing around the stator core (70).

[0026] A ninth aspect of the present disclosure is directed to the compressor (10) according to any one of the first to eighth aspects. In the compressor (10), the fixed part (83) is a sleeve (83) that bundles the first-phase neutral conductor (82A) and the second-phase neutral conductor (82B).

[0027] According to the ninth aspect, the first-phase neutral conductor (82A) and the second-phase neutral conductor (82B) can be easily fixed by bundling them with the sleeve (83).

[0028] A tenth aspect of the present disclosure is directed to a refrigeration system (1). The refrigeration system (1) includes a compressor (10) according to any one of the first to ninth aspects. [Brief description of the drawings]

[0029] [Figure 1] FIG. 1 shows a refrigeration device (1). [Diagram 2] FIG. 2 shows a longitudinal cross-sectional view of the compressor (10). [Diagram 3]FIG. 3 is a vertical cross-sectional view showing the periphery of the motor (60) of the compressor (10). [Figure 4] FIG. 4 shows a plan view of the stator core (70) of the motor (60). [Diagram 5] FIG. 5 shows the insulator (90) in plan view. [Figure 6] FIG. 6 shows a plan view of the stator core (70) and the insulator (90). [Figure 7] FIG. 7 shows a plan view of the stator core (70), the coils (80), and the insulators (90). [Figure 8] FIG. 8 shows a schematic diagram of a lead wire (81) and a neutral wire (82) extending from a coil (80). [Figure 9] FIG. 9 is a perspective view showing a fixing sleeve (83) that bundles the neutral wires (82) together. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications are possible within the scope of the technical idea of ​​the present disclosure. Since each drawing is intended to conceptually explain the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding.

[0031] (Refrigeration equipment) A compressor (10) according to this embodiment will be described. The compressor (10) is applied to a refrigeration system (1). FIG. 1 shows the refrigeration system (1). The refrigeration system (1) includes a refrigerant circuit (1a) in which a refrigerant circulates as a working fluid. The refrigerant circuit (1a) of the refrigeration system (1) includes a compressor (10), a condenser (heat radiator) (2), a pressure reduction mechanism (expansion mechanism) (3), and an evaporator (4). The pressure reduction mechanism (3) is, for example, an expansion valve or a capillary tube. The refrigerant circuit (1a) performs a vapor compression refrigeration cycle. The refrigeration system (1) is applied to, for example, an air conditioner or a chiller.

[0032] (Compressor) Fig. 2 shows a longitudinal cross-sectional view of the compressor (10). The compressor (10) is a scroll compressor. The compressor (10) includes a casing (20), a compression mechanism (30), a drive shaft (40), a housing (50), a motor (60), a lower bearing member (100), and a terminal block (110). For simplicity, a balance weight, an oil supply / drainage mechanism, and the like are not shown in Fig. 2.

[0033] Hereinafter, the direction in which the axis of the drive shaft (40) extends is referred to as the axial direction and is designated as (Z). The direction perpendicular to the axis of the drive shaft (40) is referred to as the radial direction and is designated as (R). The radial direction closer to the axis of the drive shaft (40) is referred to as the radially inward direction and is designated as (R1). The radial direction farther from the axis of the drive shaft (40) is referred to as the radially outward direction and is designated as (R2). The rotation direction of the drive shaft (40) is referred to as the circumferential direction and is designated as (T). The axial direction of the drive shaft (40) extends in the vertical direction. The upper side in the axial direction (vertical direction) is referred to as one axial direction and is designated as (Z1). The lower side in the axial direction (vertical direction) is referred to as the other axial direction and is designated as (Z2).

[0034] The compressor (10) is placed vertically. A compression mechanism (30), a housing (50), a motor (60), and a lower bearing member (100) are housed in the casing (20) from top to bottom in this order. The drive shaft (40) extends axially (vertically) within the casing (20). The terminal block (110) is fixed to the outer peripheral wall of the casing (20).

[0035] (Casing) The casing (20) is a cylindrical sealed container that extends vertically in the axial direction (vertical direction). The casing (20) includes a body portion (21), a first end plate portion (22), a second end plate portion (23), and legs (24). The body portion (21) is cylindrical with both axial (vertical) ends open. The first end plate portion (22) closes one axial end (upper end) of the body portion (21). The second end plate portion (23) closes the other axial end (lower end) of the body portion (21). The legs (24) are provided below the second end plate portion (23) and support the casing (20).

[0036] A suction pipe (25) and a discharge pipe (26) are connected to the casing (20). The suction pipe (25) axially penetrates the first end plate portion (22) of the casing (20). The discharge pipe (26) radially penetrates the body portion (21) of the casing (20). An oil reservoir (27) is provided at the lower bottom of the casing (20). The oil reservoir (27) stores lubricating oil for lubricating the sliding parts of the compressor (10).

[0037] (Compression mechanism) The compression mechanism (30) is provided in the casing (20). The compression mechanism (30) compresses a working fluid (e.g., a refrigerant). The working fluid is a gas. The compression mechanism (30) has a fixed scroll (31) and an orbiting scroll (movable scroll) (35). The orbiting scroll (35) is meshed with the fixed scroll (31).

[0038] The fixed scroll (31) includes a fixed end plate portion (32), a fixed side wrap (33), and an outer circumferential wall portion (34). The fixed side end plate portion (32) is disk-shaped. The fixed side wrap (33) is a spiral wall that describes an involute curve and protrudes downward from the lower surface of the fixed side end plate portion (32). The outer circumferential wall portion (34) is formed so as to surround the fixed side wrap (33) from the outer circumferential side and protrudes downward from the lower surface of the fixed side end plate portion (32). The tip surface (lower end surface) of the outer circumferential wall portion (34) is substantially flush with the tip surface (lower end surface) of the fixed side wrap (33).

[0039] The orbiting scroll (35) includes a movable end plate portion (36), a movable wrap (37), and a boss portion (38). The movable end plate portion (36) is disk-shaped. The movable wrap (37) is a spiral wall that describes an involute curve and protrudes upward from the upper surface of the movable end plate portion (36). The boss portion (38) is cylindrical and protrudes downward from the center of the lower surface of the movable end plate portion (36). A bearing (38a) is fitted into the inner periphery of the boss portion (38).

[0040] In the compression mechanism (30), a movable wrap (37) of the orbiting scroll (35) is meshed with a fixed wrap (33) of the fixed scroll (31). A compression chamber (C) is formed in a region surrounded by the fixed end plate portion (32) and the fixed wrap (33) of the fixed scroll (31) and the movable end plate portion (36) and the movable wrap (37) of the orbiting scroll (35). In the compression chamber (C), a working fluid is compressed. The compression chamber (C) is in communication with the suction pipe (25).

[0041] A discharge port (P) is formed in the fixed end plate portion (32) of the fixed scroll (31). The discharge port (P) axially passes through a central portion of the fixed end plate portion (32) and communicates with the compression chamber (C). A discharge chamber (S) is formed in a region between the fixed scroll (31) and the first end plate portion (22) of the casing (20). The discharge chamber (S) communicates with the discharge port (P).

[0042] (Drive shaft) The drive shaft (40) extends in the axial direction (vertical direction) within the casing (20). The drive shaft (40) extends in the axial direction (vertical direction) from the upper end of the body portion (21) of the casing (20) to the lower bottom portion (oil reservoir portion (27)) of the casing (20). The drive shaft (40) has a main shaft portion (41) and an eccentric shaft portion (42). The eccentric shaft portion (42) is provided at one axial end (upper end) of the main shaft portion (41). The outer diameter of the eccentric shaft portion (42) is smaller than the outer diameter of the main shaft portion (41). The axis (42a) of the eccentric shaft portion (42) is eccentric with respect to the axis (41a) of the main shaft portion (41) by a predetermined distance.

[0043] The eccentric shaft portion (42) of the drive shaft (40) is rotatably (slidably) supported by the boss portion (38) of the orbiting scroll (35) through a bearing (38a).

[0044] (housing) The housing (50) has a cylindrical shape extending in the axial direction (vertical direction). The housing (50) is provided in the casing (20) below the orbiting scroll (35) and above the motor (60). The drive shaft (40) is inserted into the inner periphery of the housing (50). The outer diameter of the upper portion of the housing (50) is larger than the outer diameter of the lower portion of the housing (50). The outer peripheral surface of the upper portion of the housing (50) is fixed to the inner peripheral surface of the body portion (21) of the casing (20). The internal space of the casing (20) is divided into an upper space of the housing (50) and a lower space (28) of the housing (50).

[0045] The lower space (28) of the housing (50) is formed in a region between the housing (50) and the motor (60). The lower space (28) of the housing (50) communicates with the discharge chamber (S) through a discharge passage (not shown) formed in the fixed scroll (31) and the housing (50). The lower space (28) of the housing (50) communicates with the discharge pipe (26). The lower space (28) of the housing (50) is filled with a high-pressure working fluid (e.g., high-pressure discharge refrigerant).

[0046] The inner diameter of the upper portion of the housing (50) is larger than the inner diameter of the lower portion of the housing (50). A crank chamber (51) is formed on the inner periphery of the upper portion of the housing (50) by a downwardly recessed portion. The crank chamber (51) accommodates the boss portion (38) of the orbiting scroll (35).

[0047] A main bearing portion (52) is formed on the inner periphery of the lower portion of the housing (50). The main bearing portion (52) penetrates the housing (50) in the axial direction (vertical direction) and communicates with the crank chamber (51). A bearing (52a) is fitted into the inner periphery of the main bearing portion (52). The main shaft portion (41) of the drive shaft (40) is rotatably (slidably) supported by the main bearing portion (52) of the housing (50) via the bearing (52a).

[0048] (Lower bearing member) The lower bearing member (100) has a generally cylindrical shape extending in the axial direction (vertical direction). The lower bearing member (100) is provided in the casing (20) between the motor (60) and the oil reservoir (27) (the lower bottom part of the casing (20)). The lower bearing member (100) is fixed to the inner circumferential surface of the body part (21) of the casing (20). A bearing (100a) is fitted into the inner circumferential surface of the lower bearing member (100). The main shaft part (41) of the drive shaft (40) is rotatably (slidably) supported by the lower bearing member (100) via the bearing (100a).

[0049] (Motor) The motor (60) is provided in the casing (20) below the housing (50) and above the lower bearing member (100). The motor (60) drives the compression mechanism (30) by rotating the drive shaft (40).

[0050] The motor (60) is a three-phase AC motor having phases U, V, and W. In this example, the U phase is treated as a first phase, and the phases other than the U phase, the V phase and the W phase, are each treated as a second phase.

[0051] The motor (60) includes a rotor core (61), a stator core (70), a plurality of coils (80), and an insulator (90).

[0052] FIG. 3 shows a longitudinal cross-sectional view of the motor (60) and its periphery in the compressor (10). FIG. 4 shows a plan view of the stator core (70) of the motor (60) as viewed in the axial direction. FIG. 5 shows a plan view of the insulator (90) as viewed in the axial direction. FIG. 6 shows a plan view of the stator core (70) and the insulator (90) as viewed in the axial direction. FIG. 7 shows a plan view of the stator core (70), the coil (80), and the insulator (90) as viewed from the other axial direction (below). In the following description, the side furthest from the axial center of the motor (60) is referred to as the axially outer side.

[0053] (Rotor core) As shown in Fig. 3, the rotor core (61) has a cylindrical shape extending in the axial direction (vertical direction). The main shaft portion (41) of the drive shaft (40) is inserted and fixed to the inner periphery of the rotor core (61). A plurality of inner gas passages (61a) are formed inside the rotor core (61). The plurality of inner gas passages (61a) penetrate the rotor core (61) in the axial direction (vertical direction) and are arranged at predetermined intervals along the circumferential direction of the rotor core (61). The rotor core (61) is made of metal.

[0054] (Stator core) The stator core (70) has a cylindrical shape extending in the axial direction (vertical direction). The stator core (70) is fixed to an inner peripheral surface of the body portion (21) of the casing (20). The stator core (70) is disposed so as to surround the rotor core (61) from the radially outward side (outer peripheral side). There is a predetermined radial gap between the stator core (70) and the rotor core (61). The rotor core (61) is rotatably inserted into the inner peripheral side of the stator core (70). The stator core (70) is made of metal.

[0055] As shown in FIG. 4, the stator core (70) includes a back yoke (71) and a plurality of teeth (72).

[0056] (Back yoke) The back yoke (71) has an annular shape when viewed in the axial direction (vertical direction). The back yoke (71) extends in the axial direction (vertical direction). The back yoke (71) can also be said to have a cylindrical shape.

[0057] (Teeth) The teeth (72) protrude radially inward (toward the inner circumference) from a yoke inner peripheral surface (71a) of the back yoke (71). The teeth (72) are arranged at predetermined intervals from one another in the circumferential direction. The yoke inner peripheral surface (71a) faces radially inward (toward the inner circumference).

[0058] The multiple teeth (72) include U-phase teeth (72u) as first teeth (72A), V-phase teeth (72v) as second teeth (72B), and W-phase teeth (72w) as second teeth (72B).

[0059] In this example, there are a total of 12 teeth 72. There are four U-phase teeth 72u, four V-phase teeth 72v, and four W-phase teeth 72w. The U-phase teeth 72u, the V-phase teeth 72v, and the W-phase teeth 72w are arranged one each in the circumferential direction in the order U, V, W.

[0060] The U-phase teeth (72u), V-phase teeth (72v), and W-phase teeth (72w) protrude radially inward (toward the inner circumference) from a yoke inner peripheral surface (71a) of the back yoke (71). The U-phase teeth (72u), V-phase teeth (72v), and W-phase teeth (72w) are arranged at predetermined intervals from one another in the circumferential direction.

[0061] (coil) As shown in Fig. 7, a plurality of coils 80 correspond to a plurality of teeth 72. One coil 80 is wound in a concentrated manner around one tooth 72 (concentrated winding). The coil 80 is formed by winding a metal conductive wire (winding) around the tooth 72.

[0062] The multiple coils (80) include a U-phase coil (80u) as a first phase coil (80A), a V-phase coil (80v) as a second phase coil (80B), and a W-phase coil (80w) as the second phase coil (80B). In this example, there are a total of 12 coils (80). There are four U-phase coils (80u), four V-phase coils (80v), and four W-phase coils (80w). The U-phase coils (80u), the V-phase coils (80v), and the W-phase coils (80w) are arranged one by one in the circumferential direction in the order of U, V, and W.

[0063] A U-phase coil (80u) is wound around the U-phase teeth (72u). A V-phase coil (80v) is wound around the V-phase teeth (72v). A W-phase coil (80w) is wound around the W-phase teeth (72w).

[0064] (Core Cut) As shown in Fig. 4, a plurality of core cuts (73) are provided on the yoke outer peripheral surface (71b) of the back yoke (71). The yoke outer peripheral surface (71b) faces radially outward (outer peripheral side). The core cuts (73) extend in the axial direction from one axial end (upper end) to the other axial end (lower end) of the yoke outer peripheral surface (71b). The core cuts (73) are grooves extending in the axial direction (up-down direction).

[0065] The core cuts (73) are recessed radially inward (toward the inner circumference) from the outer circumferential surface (71b) of the yoke. The core cuts (73) are arranged at intervals along the circumferential direction. In this example, there are 16 core cuts (73). The radial depth (groove depth) of the core cuts (73) is, for example, preferably 1 mm or more, and more preferably 5 mm or more.

[0066] 3, the core cut (73) forms an outer gas passage (74). The outer gas passage (74) extends in the axial direction (vertical direction) between the inner circumferential surface of the body portion (21) of the casing (20) and the groove bottom surface (73a) of the core cut (73) of the back yoke (71).

[0067] (Insulator) As shown in Fig. 3, there are two insulators (90). The insulators (90) are arranged on both axial (vertical) outer sides (upper and lower sides) of the stator core (70). As shown in Fig. 6, the insulators (90) are provided on a yoke end face (71c) in the axial direction (vertical direction) of the back yoke (71) and on teeth end faces (72a) in the axial direction of the multiple teeth (72). The yoke end face (71c) and the teeth end faces (72a) face outward in the axial direction (upper and lower).

[0068] As shown in FIGS. 5 and 6, the insulator (90) includes an outer circumferential wall (91), a plurality of protrusions (92), and an inner circumferential wall (93).

[0069] Further, the outer peripheral wall (91) includes a seat portion (91a) and an outer cylinder portion (91b). The seat portion (91a) of the outer peripheral wall (91) is annular when viewed in the axial direction (up-down direction). The seat portion (91a) of the outer peripheral wall (91) is provided near the inner periphery of the yoke end surface (71c) of the back yoke (71). The seat portion (91a) of the outer peripheral wall (91) is placed in contact with the yoke end surface (71c).

[0070] The outer tubular portion (91b) of the outer circumferential wall (91) is annular when viewed in the axial direction (up and down). The outer tubular portion (91b) of the outer circumferential wall (91) extends in the axial direction. The outer tubular portion (91b) of the outer circumferential wall (91) can also be said to be cylindrical. In the outer circumferential wall (91), the outer tubular portion (91b) extends axially outward (up and down) from the inner circumferential end portion of the seat portion (91a) (corresponding to the inner circumferential end portion of the yoke end surface (71c)).

[0071] An inner peripheral end of the seat portion (91a) of the outer peripheral wall (91), an inner peripheral end of the outer cylinder portion (91b) of the outer peripheral wall (91), and an inner peripheral end of the back yoke (71) are substantially flush with one another in the radial direction. In the outer peripheral wall (91), the outer diameter of the seat portion (91a) is larger than the outer diameter of the outer cylinder portion (91b). In the outer peripheral wall (91), the outer peripheral end of the seat portion (91a) protrudes radially outward (toward the outer periphery) beyond the outer peripheral end of the outer cylinder portion (91b). Although details will be described later, a notch (94) and a small notch (95) are formed in the outer cylinder portion (91b) of the outer peripheral wall (91) (see FIG. 9).

[0072] The multiple protrusions (92) correspond to the multiple teeth (72). In this example, there are twelve multiple protrusions (92). The protrusions (92) protrude radially inward (toward the inner circumference) from the inner circumferential surface of the seat portion (91a) of the outer circumferential wall (91). The protrusions (92) are provided on the tooth end faces (72a) of the teeth (72). The protrusions (92) are placed in contact with the tooth end faces (72a).

[0073] The inner peripheral wall (93) has an annular shape when viewed in the axial direction (up and down direction). The inner peripheral wall (93) extends in the axial direction. The inner peripheral wall (93) can also be said to be cylindrical. The inner peripheral wall (93) extends axially outward (up and down) from inner peripheral ends of the protrusions (92) (corresponding to inner peripheral ends of the teeth (72)).

[0074] The insulator (90) is made of resin. The insulator (90) insulates the coil (80) from the back yoke (71) of the stator core (70). The coil (80) is wound around the teeth (72) of the stator core (70) together with the protruding portions (92) of the insulator (90). The coil (80) includes a coil end that protrudes axially outward (upward and downward) from the stator core (70). The outer tubular portion (91b) of the outer circumferential wall (91) and the inner circumferential wall (93) of the insulator (90) cover the coil end of the coil (80) from both radial sides (outer circumferential side and inner circumferential side).

[0075] (Lead wire) 8 is a schematic diagram of a number of lead wires (81) extending from a coil (80). The number of lead wires (81) includes a U-phase lead wire (81u) serving as a first-phase lead wire (81A), a V-phase lead wire (81v) serving as a second-phase lead wire (81B), and a W-phase lead wire (81w) serving as the second-phase lead wire (81B). In this example, there are six lead wires (81) in total. There are two each of the U-phase lead wires (81u), the V-phase lead wires (81v), and the W-phase lead wires (81w).

[0076] The U-phase lead wire (81u) is drawn out in one axial direction (upward) from the U-phase coil (80u). Two adjacent U-phase coils (80u) sandwiching the V-phase coil (80v) and the W-phase coil (80w) form a U-phase coil group. There are two U-phase coil groups. In one U-phase coil group, one axial end (upper end) of the winding in one U-phase coil (80u) and one axial end (upper end) of the winding in the other U-phase coil (80u) are joined by a common U-phase lead wire (81u).

[0077] The U-phase lead wire (81u) corresponding to one U-phase coil group and the U-phase lead wire (81u) corresponding to the other U-phase coil group are pulled out in one axial direction (upward), and then merge midway (not shown) and connected to a U-phase terminal on the terminal block (110).

[0078] The V-phase lead wire (81v) is drawn out in one axial direction (upward) from the V-phase coil (80v). A V-phase coil group is formed by two adjacent V-phase coils (80v) sandwiching the W-phase coil (80w) and the U-phase coil (80u). There are two V-phase coil groups. In one V-phase coil group, one axial end (upper end) of the winding in one V-phase coil (80v) and one axial end (upper end) of the winding in the other V-phase coil (80v) are joined by a common V-phase lead wire (81v).

[0079] A V-phase lead wire (81v) corresponding to one V-phase coil group and a V-phase lead wire (81v) corresponding to the other V-phase coil group are pulled out in one axial direction (upward), and then merge midway (not shown) and connected to a V-phase terminal on the terminal block (110).

[0080] The W-phase lead wire (81w) is drawn out in one axial direction (upward) from the W-phase coil (80w). Two adjacent W-phase coils (80w) sandwiching the U-phase coil (80u) and the V-phase coil (80v) form a W-phase coil group. There are two W-phase coil groups. In one W-phase coil group, one axial end (upper end) of the winding in one W-phase coil (80w) and one axial end (upper end) of the winding in the other W-phase coil (80w) are joined by a common W-phase lead wire (81w).

[0081] A W-phase lead wire (81w) corresponding to one W-phase coil group and a W-phase lead wire (81w) corresponding to the other W-phase coil group are pulled out in one axial direction (upward), and then merge midway (not shown) and connected to a W-phase terminal on the terminal block (110).

[0082] (Neutral conductor) 8 is a schematic diagram of a plurality of neutral wires (82) extending from a coil (80). The plurality of neutral wires (82) include a U-phase neutral wire (82u) serving as a first-phase neutral wire (82A), a V-phase neutral wire (82v) serving as a second-phase neutral wire (82B), and a W-phase neutral wire (82w) serving as the second-phase neutral wire (82B). In this example, there are six neutral wires (82) in total. There are two each of the U-phase neutral wire (82u), the V-phase neutral wire (82v), and the W-phase neutral wire (82w).

[0083] The U-phase neutral wire (82u) is drawn out in the other axial direction (downward) from the U-phase coil (80u). In one U-phase coil group, the other axial end (lower end) of the winding in one U-phase coil (80u) and the other axial end (lower end) of the winding in the other U-phase coil (80u) join together at a common U-phase neutral wire (82u).

[0084] The V-phase neutral wire (82v) is drawn out in the other axial direction (downward) from the V-phase coil (80v). In one V-phase coil group, the other axial end (lower end) of the winding in one V-phase coil (80v) and the other axial end (lower end) of the winding in the other V-phase coil (80v) join together at a common V-phase neutral wire (82v).

[0085] The W-phase neutral wire (82w) is drawn out in the other axial direction (downward) from the W-phase coil (80w). In one W-phase coil group, the other axial end (lower end) of the winding in one W-phase coil (80w) and the other axial end (lower end) of the winding in the other W-phase coil (80w) join together at a common W-phase neutral wire (82w).

[0086] (Positional relationship between lead wire and neutral wire) The positional relationship between the lead wire (81) and the neutral wire (82) will be described. As described above, the U-phase lead wire (81u), the V-phase lead wire (81v), and the W-phase lead wire (81w) are drawn out in one axial direction (upward) from the U-phase coil (80u), the V-phase coil (80v), and the W-phase coil (80w). As described above, the U-phase neutral wire (82u), the V-phase neutral wire (82v), and the W-phase neutral wire (82w) are drawn out in the other axial direction (downward) from the U-phase coil (80u), the V-phase coil (80v), and the W-phase coil (80w).

[0087] The U-phase neutral wire (82u), the V-phase neutral wire (82v), and the W-phase neutral wire (82w) are pulled out on the opposite axial direction (up and down direction) to the U-phase lead wire (81u), the V-phase lead wire (81v), and the W-phase lead wire (81w).

[0088] (terminal block) As shown in Fig. 3, the terminal block (110) is fixed to the outer peripheral wall of the body part (21) of the casing (20). The terminal block (110) holds terminals for electrically connecting an external power source and the motor (60). The terminal block (110) may be in the shape of a box (terminal box) for accommodating terminals. The terminal block (110) is located at approximately the same position in the axial direction (upward / downward direction) as one axial end (upper end) of the motor (60). The terminal block (110) is located closer to one axial end (upper end) of the motor (60) than to the other axial end (lower end) of the motor (60).

[0089] The terminal block (110) is positioned in the axial direction (up and down direction) closer to the U-phase lead wire (81u), the V-phase lead wire (81v), and the W-phase lead wire (81w) than to the U-phase neutral wire (82u), the V-phase neutral wire (82v), and the W-phase neutral wire (82w).

[0090] (Fixed sleeve) As shown in Fig. 8, the two neutral conductors (82) are fixed to each other by a fixed sleeve (83) serving as a fixing portion. It can also be said that the two neutral conductors (82) are held by the fixed sleeve (83). The fixed sleeve (83) constitutes a neutral point. The fixed sleeve (83) is cylindrical. The fixed sleeve (83) is made of metal.

[0091] In this example, there are a total of six fixed sleeves (83). The fixed sleeves (83) include two first fixed sleeves (83A) serving as first fixed portions, two second fixed sleeves (83B) serving as second fixed portions, and two third fixed sleeves (83C) serving as third fixed portions.

[0092] The U-phase neutral conductor (82u) and the V-phase neutral conductor (82v) are fixed to each other by a first fixed sleeve (83A). The U-phase neutral conductor (82u) and the W-phase neutral conductor (82w) are fixed to each other by a second fixed sleeve (83B). The V-phase neutral conductor (82v) and the W-phase neutral conductor (82w) are fixed to each other by a third fixed sleeve (83C).

[0093] The first fixed sleeve (83A) bundles and crimps the U-phase neutral conductor (82u) and the V-phase neutral conductor (82v). The second fixed sleeve (83B) bundles and crimps the U-phase neutral conductor (82u) and the W-phase neutral conductor (82w). The third fixed sleeve (83C) bundles and crimps the V-phase neutral conductor (82v) and the W-phase neutral conductor (82w).

[0094] As shown in FIG. 7, the two first fixed sleeves (83A), the two second fixed sleeves (83B), and the two third fixed sleeves (83C) are arranged at different positions (non-overlapping positions) in the circumferential direction when viewed in the axial direction (up-down direction).

[0095] When viewed in the axial direction (up and down), the fixed sleeve (83) is positioned at a position (different position) that does not overlap with the core cut (73) of the back yoke (71) in the circumferential direction, and is positioned radially outward (on the outer periphery side) of the yoke inner surface (71a) of the back yoke (71).

[0096] In detail, the first fixed sleeve (83A), the second fixed sleeve (83B), and the third fixed sleeve (83C) are arranged in positions (different positions) that do not overlap with the core cut (73) in the circumferential direction when viewed in the axial direction (up and down direction), and are arranged radially outward (on the outer circumferential side) of the yoke inner surface (71a).

[0097] In FIG. 4, the arrangement range (A) in which the fixing sleeve (83) can be arranged is indicated by dots.

[0098] 9 is a perspective view of the fixed sleeve (83) that bundles the neutral wires (82). As described above, the seat portion (91a) of the outer circumferential wall (91) of the insulator (90) is placed in contact with and in contact with the inner periphery of the yoke end face (71c) of the back yoke (71). The outer cylinder portion (91b) of the outer circumferential wall (91) of the insulator (90) extends axially outward (upward and downward) from the inner circumferential end portion of the seat portion (91a) (corresponding to the inner circumferential end portion of the yoke end face (71c)).

[0099] The seat portion (91a) of the outer peripheral wall (91) of the insulator (90) includes an insulator outer peripheral surface (91a1) facing radially outward (toward the outer periphery). Although not shown in Fig. 9, the insulator outer peripheral surface (91a1) of the seat portion (91a) is provided with a protrusion (91a2) protruding radially outward (toward the outer periphery) (see Fig. 5).

[0100] The outer tubular portion (91b) of the outer tubular portion (91b) of the outer tubular portion (91) includes an insulator outer tubular surface (91b1) facing radially outward (outer tubular side) and an insulator end surface (91b2) facing axially outward (upward and downward). In the outer tubular portion (91), the insulator outer tubular surface (91a1) of the seat portion (91a) protrudes radially outward (outer tubular side) beyond the insulator outer tubular surface (91b1) of the outer tubular portion (91b).

[0101] An upwardly recessed notch (94) is formed in the other axial end (lower end) of the outer tubular portion (91b) of the outer peripheral wall (91) of the insulator (90).

[0102] The fixed sleeve (83) is disposed on the outer circumferential wall (91) of the insulator (90). More specifically, the fixed sleeve (83) is disposed in a notch (94) provided in the outer tubular portion (91b) of the outer circumferential wall (91) of the insulator (90).

[0103] The other axial end (lower end) of the outer tubular portion (91b) of the outer peripheral wall (91) of the insulator (90) is also formed with a small notch (95) for holding the neutral conductor (82).

[0104] (Compressor operation) The operation of the compressor (10) will be described. When the motor (60) is driven, the drive shaft (40) rotates to drive the orbiting scroll (35) of the compression mechanism (30). The orbiting scroll (35) revolves around the axis (41a) of the main shaft portion (41) of the drive shaft (40) while its rotation is restricted. A low-pressure working fluid (e.g., low-pressure refrigerant gas) is sucked from the suction pipe (25) into the compression chamber (C) of the compression mechanism (30) and compressed to become a high-pressure working fluid (e.g., high-pressure refrigerant gas). The high-pressure working fluid is discharged from the compression chamber (C) through the discharge port (P) of the fixed scroll (31) to the discharge chamber (S). The high-pressure working fluid flows from the discharge chamber (S) through a discharge passage (not shown) formed in the fixed scroll (31) and the housing (50) into the lower space (28) of the housing (50). The high-pressure fluid is discharged from the lower space (28) through the discharge pipe (26) to the outside of the casing (20) (for example, to the condenser (2) of the refrigerant circuit (1a)).

[0105] (Flow of working fluid around the motor) The flow of the working fluid around the motor (60) will be described with reference to Fig. 3. The working fluid compressed by the compression mechanism (30) is discharged into the internal space of the casing (20) through the discharge port (P). The working fluid is guided to the outer gas passage (74) by a passage (not shown) and a guide member (not shown) formed in the compression mechanism (30). As described above, the outer gas passage (74) is formed by the core cut (73) provided in the back yoke (71) of the stator core (70).

[0106] In the outer gas passage (74), the working fluid flows in the other axial direction (downward). The working fluid having passed through the outer gas passage (74) flows into the inner gas passage (61a) of the rotor core (61) from the other axial direction (downward). In the inner gas passage (61a), the working fluid flows in one axial direction (upward). The working fluid having passed through the inner gas passage (61a) flows into the lower space (28) between the housing (50) and the motor (60) and is then discharged to the outside of the casing (20) through the discharge pipe (26).

[0107] The working fluid may flow in one axial direction (upward) radially inward (inner circumferential side) of the yoke inner circumferential surface (71a) of the back yoke (71) of the stator core (70) in addition to the inner gas passage (61a) of the rotor core (61). The working fluid may flow between circumferentially adjacent teeth (72) (i.e., inside the coil (80)) radially inward (inner circumferential side) of the yoke inner circumferential surface (71a) of the back yoke (71).

[0108] (Action and effect) According to this embodiment, the fixing sleeve (83) that fixes the neutral wires (82) to each other is positioned in a position that does not overlap the core cut (73) of the back yoke (71) in the circumferential direction (T) and is positioned radially outward (on the outer periphery) of the yoke inner surface (71a) of the back yoke (71) (see arrangement range (A) in Figure 4).

[0109] By positioning the fixed sleeve (83) in this arrangement range (A), the fixed sleeve (83) is less exposed to the working fluid flowing in the axial direction (up and down direction) along the core cut (73) or the working fluid flowing in the axial direction (up and down direction) radially inward (on the inner circumferential side, for example, inside the coil (80)) than the yoke inner surface (71a).

[0110] In the compressor (10), the fixing sleeve (83) that fixes the neutral wires (82) to each other can be protected from the working fluid flowing around the stator core (70).

[0111] The neutral wires (82) are prevented from being released from the fixed sleeve (83). The fixed sleeve (83) is prevented from falling off the stator core (70). The fixed sleeve (83) is prevented from being damaged.

[0112] By disposing the fixed sleeve (83) on the outer peripheral wall (91) of the insulator (90), the fixed sleeve (83) can be easily positioned radially outward (outer peripheral side) of the yoke inner peripheral surface (71a) of the back yoke (71).

[0113] By forming the notch (94) in the outer tubular portion (91b) of the outer peripheral wall (91) of the insulator (90), it becomes easier to position the fixed sleeve (83) on the outer peripheral wall (91) of the insulator (90).

[0114] By drawing out the neutral conductor (82) in the axially opposite direction to the lead conductor (81), it is possible to suppress interference between the neutral conductor (82) and the lead conductor (81). This makes it easier to wire the neutral conductor (82), and increases the degree of freedom in the layout of the fixed sleeve (83).

[0115] Since the terminal block (110) is located near the lead wires (81), it becomes easy to extend the lead wires (81) to the terminal block (110).

[0116] In this embodiment, not only one but a plurality of fixed sleeves (83) (the first fixed sleeve (83A), the second fixed sleeve (83B), and the third fixed sleeve (83C)) are arranged in the arrangement range (A). Not only one but a plurality of fixed sleeves (83) can be protected from the working fluid flowing around the stator core (70).

[0117] In particular, in this embodiment, by arranging all the stationary sleeves (83) in the arrangement range (A), it is possible to protect all the stationary sleeves (83) from the working fluid flowing around the stator core (70).

[0118] In this embodiment, the fixing portion (83) is formed of a fixing sleeve (83). By bundling the neutral wires (82) with the fixing sleeve (83), the neutral wires (82) can be easily fixed to each other.

[0119] (Other embodiments) Other embodiments will now be described.

[0120] 9, the fixing sleeve (83) may be disposed on an insulator outer circumferential surface (91a1) of the seat portion (91a) of the outer circumferential wall (91) of the insulator (90). Similarly, the fixing sleeve (83) may be disposed on an insulator outer circumferential surface (91b1) of the outer tubular portion (91b) of the outer circumferential wall (91) of the insulator (90).

[0121] This is more advantageous in positioning the fixed sleeve (83) radially outward (toward the outer periphery) of the yoke inner periphery surface (71a) of the back yoke (71). In this case, the fixed sleeve (83) may be floating without contacting the insulator outer periphery surface (91a1, 91b1). Although not shown, the fixed sleeve (83) may be provided on a protrusion (91a2) (see FIG. 5) protruding from the insulator outer periphery surface (91a1) in the seat portion (91a) of the outer periphery wall (91).

[0122] 9, the fixed sleeve (83) may be disposed on an insulator end surface (91b2) at the other axial end (lower end) of the outer tubular portion (91b) of the outer peripheral wall (91) of the insulator (90). This makes it easy to dispose the fixed sleeve (83) on the outer peripheral wall (91) of the insulator (90). Note that in this case, the fixed sleeve (83) may float without contacting the insulator end surface (91b2).

[0123] The fixed sleeve (83) does not have to be disposed on the outer circumferential wall (91) of the insulator (90). The fixed sleeve (83) may be disposed anywhere within the arrangement range (A).

[0124] The rotor core (61) does not necessarily have to be provided with the inner gas passage (61a).

[0125] The fixing sleeve (83) may fix the U-phase neutral conductor (82u), the V-phase neutral conductor (82v), and the W-phase neutral conductor (82w) together.

[0126] The fixing portion (83) is not limited to crimping with the fixing sleeve (83) and may be, for example, brazed or taped. Also, the bare neutral conductors (82) may be directly crimped to each other as the fixing portion (83).

[0127] The ring shape is not limited to a circular ring shape, but may be an angular ring shape having some corners.

[0128] The compressor (10) may be disposed horizontally, i.e., the axial direction (Z) may be horizontal.

[0129] The coil (80) is not limited to concentrated winding, but may be distributed winding.

[0130] In the above embodiment, the motor (60) is a three-phase AC motor, and the U phase is treated as the first phase, and the V phase and the W phase are treated as the second phase, but this is not limiting. For example, the V phase may be treated as the first phase, and the W phase and the U phase may be treated as the second phase. Also, the W phase may be treated as the first phase, and the U phase and the V phase may be treated as the second phase.

[0131] Furthermore, the motor (60) may be a two-phase AC motor, in which case one phase is treated as a first phase and the other phase is treated as a second phase.

[0132] The compressor (10) is not limited to a scroll compressor, but may be another type of compressor, such as a rotary compressor.

[0133] The compressor (10) does not have to be applied to the refrigeration system (1) and may be used, for example, as a standalone unit.

[0134] Although the embodiments have been described above, it will be understood that various modifications of form and details are possible without departing from the spirit and scope of the claims. Elements of the above-mentioned embodiments, modifications, and other embodiments may be appropriately combined or substituted. [Explanation of symbols]

[0135] Z axis direction R Radial direction R1 Inward R2 outward T circumferential direction A. Placement range 1 Refrigeration equipment 10 Compressor 20 Casing 30 Compression Mechanism 40 Drive shaft 50 Housing 60 Motor 61 Rotor core 70 Stator core 71 Back Yoke 71a Yoke inner surface 71b Yoke outer surface 71c Yoke end face 72 Teeth 72a Teeth end face 72A 1st Teeth 72B 2nd Teeth 72u U phase teeth 72v V phase teeth 72w W phase teeth 73 Core Cut 80 Coil 80A 1st phase coil 80B 2nd phase coil 80u U phase coil 80v V phase coil 80w W phase coil 81 Lead Wire 81A Phase 1 lead 81B Phase 2 lead 81u U phase lead wire 81v V phase lead wire 81w W phase lead wire 82 Neutral conductor 82A 1st phase neutral wire 82B 2nd phase neutral wire 82u U phase neutral wire 82v V phase neutral wire 82w W phase neutral wire 83 Fixed sleeve (fixed part, sleeve) 83A First fixed sleeve (first fixed part) 83B Second fixed sleeve (second fixed part) 83C 3rd fixed sleeve 90 Insulator 91 Peripheral wall 91a Seat part 91a1 Outer surface of insulator 91b Outer cylinder 91b1 Outer surface of insulator 91b2 Insulator end face 92 Protrusion 93 Inner wall 94 Notch 100 Lower bearing member 110 Terminal block

Claims

1. a compression mechanism (30) and a motor (60) that drives the compression mechanism (30), The motor (60) has a stator core (70), The stator core (70) includes a back yoke (71) that is annular and extends in an axial direction (Z), and first teeth (72A) and second teeth (72B) that protrude inward (R1) in a radial direction (R) from a yoke inner peripheral surface (71a) of the back yoke (71) and are arranged at an interval in a circumferential direction (T), a core cut (73) extending in the axial direction (Z) and recessed inward (R1) in the radial direction (R) is provided on an outer yoke surface (71b) of the back yoke (71), a first phase coil (80A) is wound around the first tooth (72A), A second phase coil (80B) is wound around the second teeth (72B), A first phase neutral conductor (82A) is drawn from the first phase coil (80A), A second phase neutral wire (82B) is drawn from the second phase coil (80B), the first-phase neutral conductor (82A) and the second-phase neutral conductor (82B) are fixed to each other by a fixing portion (83); the fixing portion (83) is disposed at a position not overlapping with the core cut (73) in the circumferential direction (T) and outward (R2) from the yoke inner peripheral surface (71a) in the radial direction (R). Compressor.

2. an insulator (90) is provided on a yoke end surface (71c) of the back yoke (71) in the axial direction (Z); The insulator (90) is annular and includes an outer peripheral wall (91) extending in the axial direction (Z), The fixing portion (83) is disposed on the outer peripheral wall (91). The compressor according to claim 1 .

3. The fixing portion (83) is disposed on an insulator outer peripheral surface (91a1, 91b1) of the outer peripheral wall (91). The compressor according to claim 2.

4. The outer peripheral wall (91) is formed with a notch (94), The fixing portion (83) is disposed in the notch (94). The compressor according to claim 2.

5. The fixing portion (83) is disposed on an insulator end surface (91b2) of the outer circumferential wall (91) in the axial direction (Z). The compressor according to claim 2.

6. A first phase lead wire (81A) is drawn out from the first phase coil (80A), A second phase lead wire (81A) is drawn out from the second phase coil (80B), The first-phase neutral conductor (82A) and the second-phase neutral conductor (82B) are drawn out on a side opposite to the axial direction (Z) with respect to the first-phase lead wire (81A) and the second-phase lead wire (81B). The compressor according to claim 1 .

7. a terminal block (110) disposed closer to the first phase lead wire (81A) and the second phase lead wire (81B) than to the first phase neutral wire (82A) and the second phase neutral wire (82B) in the axial direction (Z), The compressor according to claim 6.

8. the fixed portion (83) includes a first fixed portion (83A) and a second fixed portion (83B) arranged at positions different from each other in the circumferential direction (T), the first fixed portion (83A) and the second fixed portion (83B) are disposed at positions not overlapping with the core cut (73) in the circumferential direction (T) and outward (R2) from the yoke inner peripheral surface (71a) in the radial direction (R). The compressor according to claim 1 .

9. The fixing portion (83) is a sleeve (83) that bundles the first-phase neutral conductor (82A) and the second-phase neutral conductor (82B). The compressor according to claim 1 .

10. Comprising a compressor (10) according to any one of claims 1 to 9, Refrigeration equipment.

Images