Interphase insulation member, stator, motor, and compressor

Abstract

To provide an interphase insulation member capable of improving a cooling performance of a stator winding, and a stator, a motor, and a compressor using the same.SOLUTION: An interphase insulation member 200 is located between stator windings wound by each tooth of a stator by a concentrated winding method, wherein a first central portion 106 and a second central portion 107 are bent into a V shape at a central bend portion 101. A first edge portion 103 is provided on the first central portion 106, and a second edge portion 105 is provided on the second central portion 107. An opening 108 is provided either in the first central portion 106 or the second central portion 107.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an interphase insulating member capable of improving the cooling performance of an electric motor incorporated in a compressor.

Background Art

[0002] In a stator constituting an electric motor, an interphase insulating member is disposed between stator windings wound around adjacent teeth of a stator core via slot insulation in order to improve insulation characteristics. For example, Patent Document 1 discloses an interphase insulating member in which a central portion of a rectangular resin film is bent in a V shape, and bent portions extending in a substantially L shape are provided on both sides of the V shape.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When an electric motor provided with the above-described interphase insulating member is incorporated in a compressor constituting an air conditioner, the electric motor circulates a refrigerant in the compressor and is used as a power source for adjusting the temperature in a room. At this time, the refrigerant is also used for the purpose of cooling the electric motor. When cooling the electric motor with the refrigerant, the stator windings wound around the teeth are cooled as the refrigerant passes through the slots between the teeth. However, if an interphase insulating member is disposed between the stator windings, the refrigerant is prevented from coming into contact with the stator windings by the interphase insulating member, so that the cooling effect of the stator windings by the refrigerant is reduced.

[0005] The present invention has been devised in view of such points, and an object thereof is to provide a technique capable of preventing a reduction in the cooling effect of stator windings of an electric motor.

Means for Solving the Problems

[0006] The invention according to claim 1 is a phase insulation member disposed between stator windings wound around adjacent teeth, comprising a first central portion and a second central portion that are bent in a V shape at a central bending portion along the axial direction, a first edge portion extending from the V-shaped open side of the first central portion toward one side in the circumferential direction, and a second edge portion extending from the V-shaped open side of the second central portion toward the other side in the circumferential direction, and characterized in that an opening is provided in either the first central portion or the second central portion.

[0007] The invention according to claim 2 is a phase insulation member disposed between stator windings wound around adjacent teeth, comprising a first central portion and a second central portion that are bent in a V shape at a central bending portion along the axial direction, a first edge portion extending from the V-shaped open side of the first central portion toward one side in the circumferential direction, and a second edge portion extending from the V-shaped open side of the second central portion toward the other side in the circumferential direction, and characterized in that openings are provided in both the first central portion and the second central portion, and the positions of the opening in the first central portion and the opening in the second central portion are arranged offset from each other.

[0008] The invention according to claim 3 is the phase insulation member according to claim 2, characterized in that it is configured to include a plurality of openings in the first central portion and the second central portion, respectively.

[0009] The invention according to claim 4 is a phase insulation member disposed between stator windings wound around adjacent teeth, comprising a first central portion and a second central portion that are bent in a V shape at a central bending portion along the axial direction, a first edge portion extending from the V-shaped open side of the first central portion toward one side in the circumferential direction, and a second edge portion extending from the V-shaped open side of the second central portion toward the other side in the circumferential direction, and characterized in that an opening is provided in either the first central portion or the second central portion, and the widthwise dimensions of the first edge portion and the second edge portion are made different.

[0010] The invention according to claim 5 is a phase insulation member disposed between stator windings wound around adjacent teeth, comprising a first central portion and a second central portion that are bent in a V shape at a central bending portion along the axial direction, a first edge portion extending from the V-shaped open side of the first central portion toward one side in the circumferential direction, and a second edge portion extending from the V-shaped open side of the second central portion toward the other side in the circumferential direction. Openings are provided in both the first central portion and the second central portion, the positions of the opening in the first central portion and the opening in the second central portion are arranged to be offset, and the widthwise dimensions of the first edge portion and the second edge portion are made different, which is characterized thereby.

[0011] The invention according to claim 6 is a phase insulation member disposed between stator windings wound around adjacent teeth, comprising a first central portion and a second central portion that are bent in a V shape at a central bending portion along the axial direction, a first edge portion extending from the V-shaped open side of the first central portion toward one side in the circumferential direction, and a second edge portion extending from the V-shaped open side of the second central portion toward the other side in the circumferential direction. A plurality of openings are provided in both the first central portion and the second central portion, the positions of the opening in the first central portion and the opening in the second central portion are arranged to be offset, and the widthwise dimensions of the first edge portion and the second edge portion are made different, which is characterized thereby.

[0012] The invention according to claim 7 is characterized by using the phase insulation member according to any one of claims 1 to 6 as the phase insulation member attached to the stator.

[0013] The invention according to claim 8 is characterized by using the stator according to claim 7 as the stator incorporated in the motor.

[0014] The invention according to claim 9 is characterized by using the motor according to claim 8 as the motor incorporated in the compressor.

Advantages of the Invention

[0015] According to the invention described in claim 1, since an opening is provided in either the first central portion or the second central portion that constitutes the phase insulation member, the refrigerant circulating in the compressor can pass through the opening and contact the stator winding wound around the teeth of the stator, enhancing the cooling effect of the stator winding by the refrigerant and not impairing the insulation effect between the stator windings of each phase.

[0016] According to the invention described in claim 2, openings are provided in both the first central portion and the second central portion that constitute the phase insulation member, and the positions of the opening in the first central portion and the opening in the second central portion are displaced. Therefore, without impairing the insulation effect between the stator windings of each phase, the cooling effect of the stator winding by the refrigerant can be further enhanced.

[0017] According to the invention described in claim 3, by providing a plurality of openings in the first central portion and the second central portion and arranging the positions of the openings in a displaced manner, without impairing the insulation effect between the stator windings of each phase, the cooling effect of the stator winding by the refrigerant can be further enhanced.

[0018] According to the inventions described in claims 4 to 6, in addition to the effects of the inventions described in claims 1 to 3, by making the widthwise dimensions of the first edge portion and the second edge portion different, when the phase insulation member is arranged between the stator windings, the first central portion and the second central portion will be arranged between the stator windings in a state inclined from the radial direction, expanding the area where the refrigerant contacts the stator winding and further enhancing the cooling effect.

[0019] According to the invention described in claim 7, a stator can be provided that can achieve the effects obtained by the phase insulation member according to any one of claims 1 to 6.

[0020] According to the invention described in claim 8, a motor can be provided that can achieve the effects obtained by the stator according to claim 7.

[0021] According to the invention described in claim 9, it is possible to provide a compressor capable of realizing the effects obtained by the motor described in claim 8.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Modes for Carrying Out the Invention

[0023] Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 10. In this specification, the description of "axial direction" refers to the extending direction of the rotation center line of the rotor in a state where the rotor is arranged to be rotatable relative to the stator. Note that the rotation center line corresponds to the "stator center line". The description of "circumferential direction" refers to the circumferential direction centered on the rotation center line when viewed in a cross-section perpendicular to the axial direction in a state where the rotor is arranged to be rotatable relative to the stator.

[0024] The description of "radial direction" refers to the radial direction passing through the rotation center line when viewed in a cross-section perpendicular to the "axial direction" in a state where the rotor is arranged to be rotatable relative to the inner diameter of the stator. The description of "radially inner side" refers to the side along the radial direction toward the rotation center line, and the description of "radially outer side" refers to the side opposite to the rotation center line along the radial direction.

[0025] Note that the descriptions of "axial direction", "circumferential direction", and "radial direction" with respect to the electrical insulator assembly described later refer to the "axial direction", "circumferential direction", and "radial direction" in a state where the electrical insulator assembly is arranged on both axial sides of the stator core. Similarly, the descriptions of "radially inner side" and "radially outer side" refer to the "radially inner side" and "radially outer side" in a state where the electrical insulator assembly is arranged on both axial sides of the stator core.

[0026] Also, the descriptions of "axial direction", "circumferential direction", "radial direction", "radially inner side", and "radially outer side" with respect to the phase insulation member described later refer to the "axial direction", "circumferential direction", "radial direction", "radially inner side", and "radially outer side" in a state where the phase insulation member is arranged on the stator. And the descriptions of "axial direction", "circumferential direction", and "radial direction" shall include "substantially axial direction", "substantially circumferential direction", and "substantially radial direction".

[0027] First, an embodiment of the phase insulation member of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1(a) shows a phase insulation member 200 in Embodiment 1 of the present invention, which is formed by bending a rectangular resin film 100 shown in FIG. 1(b). As the resin film 100, films made of various known resin materials can be used.

[0028] The resin film 100 shown in FIG. 1(b) has a central bending portion 101 formed in the longitudinal direction at the center in the lateral direction of the rectangular film. On one side in the lateral direction (the right side in FIG. 1(b)), a first edge portion 103 is formed with a first bending portion 102 formed along the longitudinal direction as a boundary. On the other side in the lateral direction (the left side in FIG. 1(b)), a second edge portion 105 is formed with a second bending portion 104 formed along the longitudinal direction as a boundary.

[0029] A first central portion 106 is formed between the central bending portion 101 and the first bending portion 102, and a second central portion 107 is formed between the central bending portion 101 and the second bending portion 104. Further, a rectangular opening (through hole) 108 is formed in the first central portion 106.

[0030] The phase insulation member 200 shown in FIG. 1(a) is formed by bending the resin film 100 shown in FIG. 1(b). First, the central bending portion 101 of the resin film 100 shown in FIG. 1(b) is valley-folded so that the first central portion 106 and the second central portion 107 come to the front side of the paper surface. Thereby, the resin film 100 is bent into a V shape by the central bending portion 101.

[0031] Next, by mountain-folding the first bending portion 102 formed at the edge of the first central portion 106, the first edge portion 103 is shaped to face from the extending direction of the first central portion 106 to one side in the circumferential direction (outer side in the lateral direction). Similarly, by mountain-folding the second bending portion 104 formed at the edge of the second central portion 107, the second edge portion 105 is shaped to face from the extending direction of the second central portion 107 to the other side in the circumferential direction (outer side in the lateral direction). Thereby, the first edge portion 103 and the second edge portion 105 will extend in opposite directions.

[0032] In addition, the space between the first central portion 106 and the second central portion 107 that forms a V shape communicates with the outer space through the opening 108. In FIG. 1, the case where the opening 108 formed in the resin film 100 is formed in a rectangular shape is illustrated. However, the opening 108 formed in the resin film 100 is not limited to a rectangular shape, and may be any shape such as other polygons, circles, ellipses, etc. Also, the opening 108 may be formed in the second central portion 107 instead of the first central portion 106.

[0033] FIG. 2(a) shows the phase insulation member 300 in Embodiment 2 of the present invention, which is formed by bending the rectangular resin film 110 shown in FIG. 2(b). As the resin film 110, films made of various known resin materials can be used.

[0034] The resin film 110 shown in FIG. 2(b) has a central bending portion 111 formed in the longitudinal direction at the center in the lateral direction of the rectangular film. On one side in the lateral direction (the right side in FIG. 2(b)), a first edge portion 113 is formed with the first bending portion 112 formed along the longitudinal direction as a boundary. Also, on the other side in the lateral direction (the left side in FIG. 2(b)), a second edge portion 115 is formed with the second bending portion 114 formed along the longitudinal direction as a boundary.

[0035] A first central portion 116 is formed between the central bending portion 111 and the first bending portion 112, and a second central portion 117 is formed between the central bending portion 111 and the second bending portion 114. Also, a rectangular opening (through hole) 118a is formed in the first central portion 116, and a rectangular opening (through hole) 118b is formed in the second central portion 117. The opening 118a and the opening 118b are formed in a state of being shifted in the longitudinal direction and are arranged at positions where they do not overlap each other in the lateral direction.

[0036] The phase insulation member 300 shown in Fig. 2(a) is formed by bending the resin film 110 shown in Fig. 2(b). The central bent portion 111 of the resin film 110 shown in Fig. 2(b) is valley-folded so that the first central portion 116 and the second central portion 117 face the front side of the paper. As a result, the resin film 110 is bent into a V shape by the central bent portion 111.

[0037] Next, the first bent portion 112 formed at the edge of the first central portion 116 is mountain-folded so that the first edge portion 113 faces from the extending direction of the first central portion 116 to one side in the circumferential direction (outer side in the lateral direction). Similarly, the second bent portion 114 formed at the edge of the second central portion 117 is mountain-folded so that the second edge portion 115 faces from the extending direction of the second central portion 117 to the other side in the circumferential direction (outer side in the lateral direction). As a result, the first edge portion 113 and the second edge portion 115 extend in opposite directions.

[0038] Also, the space between the first central portion 116 and the second central portion 117 forming a V shape communicates with the outer space through the openings 118a and 118b. In Fig. 2, the case where the openings 118a and 118b formed in the resin film 110 are formed in a rectangular shape is illustrated, but the openings 118a and 118b formed in the resin film 110 are not limited to a rectangular shape, and may be any shape such as other polygons, circles, ellipses, etc. Also, the vertical positional relationship between the position of the opening 118a formed in the first central portion 116 and the opening 118b formed in the second central portion 117 may be reversed.

[0039] Fig. 3(a) shows the phase insulation member 400 in Embodiment 3 of the present invention, which is formed by bending the rectangular resin film 120 shown in Fig. 3(b). As the resin film 120, films made of various known resin materials can be used.

[0040] The resin film 120 shown in Fig. 2(b) has a central bending portion 121 formed in the longitudinal direction at the center in the lateral direction of the rectangular film. On one side in the lateral direction (the right side in Fig. 3(b)), a first edge portion 123 is formed with a first bending portion 122 formed along the longitudinal direction as a boundary. Also, on the other side in the lateral direction (the left side in Fig. 3(b)), a second edge portion 125 is formed with a second bending portion 124 formed along the longitudinal direction as a boundary.

[0041] A first central portion 126 is formed between the central bending portion 121 and the first bending portion 122, and a second central portion 127 is formed between the central bending portion 121 and the second bending portion 124. Also, rectangular openings (through holes) 128a to 128d are formed in the first central portion 126, and rectangular openings (through holes) 128e to 128g are formed in the second central portion 127. The openings 128a to 128g are all formed in a state where they are shifted in the longitudinal direction and are arranged at positions where they do not overlap in the lateral direction. In the case of Fig. 3, the case where the openings 128a to 128d formed in the first central portion 126 and the openings 128e to 128g formed in the second central portion 127 are alternately arranged in the longitudinal direction is illustrated.

[0042] The phase insulation member 400 shown in Fig. 3(a) is formed by bending the resin film 120 shown in Fig. 3(b). The central bending portion 121 of the resin film 120 shown in Fig. 3(b) is valley-folded so that the first central portion 126 and the second central portion 127 come to the front side of the paper surface. Thereby, the resin film 120 is bent into a V shape by the central bending portion 121.

[0043] Next, the first bending portion 122 formed at the edge of the first central portion 126 is mountain-folded so that the first edge portion 123 faces from the extending direction of the first central portion 126 to one side in the circumferential direction (outer side in the lateral direction). Similarly, the second bending portion 124 formed at the edge of the second central portion 127 is mountain-folded so that the second edge portion 125 faces from the extending direction of the second central portion 127 to the other side in the circumferential direction (outer side in the lateral direction). Thereby, the first edge portion 123 and the second edge portion 125 extend in opposite directions.

[0044] Also, the space between the first central portion 126 and the second central portion 127 that forms a V shape communicates with the outer space through the openings 128a to 128g. In FIG. 3, the case where the openings 128a to 128g formed in the resin film 120 are formed in a rectangular shape is illustrated, but the openings 128a to 128g formed in the resin film 120 are not limited to a rectangular shape, and may be any shape such as other polygons, circles, ellipses, etc. Also, the vertical positional relationship between the positions of the openings 128a to 128d formed in the first central portion 126 and the openings 128e to 128g formed in the second central portion 127 may be reversed, or instead of arranging them alternately in the vertical direction, the openings arranged in the first central portion 126 or the openings formed in the second central portion 127 may be continuously formed in the vertical direction, respectively.

[0045] FIG. 4(a) is a diagram showing the relationship between the lateral widths of the first edge portion 103 and the second edge portion 105 of the phase insulation member 200 in Embodiment 1. The lateral widths of the first edge portion 103 and the second edge portion 105 of the phase insulation member 200 are both the same dimension w. In order to make the lateral widths of the first edge portion 103 and the second edge portion 105 be w, in the state of the resin film 100 shown in FIG. (b), the position of the first bent portion 102 formed at the edge of the first central portion 106 is formed at a position w from the right end of the resin film 100, and the position of the second bent portion 104 formed at the edge of the second central portion 107 is formed at a position w from the left end of the resin film 100.

[0046] In FIG. 4, the lateral widths of the first edge portion 103 and the second edge portion 105 of the phase insulation member 200 in Embodiment 1 are taken as an example for explanation. However, the lateral widths of the first edge portion 113 and the second edge portion 115 of the phase insulation member 300 in Embodiment 2 and the lateral widths of the first edge portion 123 and the second edge portion 125 of the phase insulation member 400 in Embodiment 3 are also set to w in the same manner as in the case of Embodiment 1.

[0047] Next, a case of attaching the above-described phase insulation member 200 (300, 400) to the stator core 1 will be described. FIG. 5 shows the stator 1 of the present invention, which is composed of a stator core 2, a slot insulation member 3, a stator winding 4, an electrical insulator assembly 5, and a phase insulation member 200. The stator core 2 is composed of a laminate of a plurality of electromagnetic steel sheets and has core end faces 2A and 2B on one side in the axial direction and the other side in the axial direction.

[0048] The stator core 2 includes a yoke 21 extending along the circumferential direction and a plurality of teeth 22 extending radially inward from the yoke 21 when viewed in a cross-section perpendicular to the axial direction. The teeth 22 include a teeth base portion (not shown) extending along the radial direction and a teeth tip portion 22a provided on the radially inner side of the teeth base portion and extending along the circumferential direction.

[0049] A central space 6 is formed by a teeth tip face 22b on the radially inner side of the teeth tip portion 22a. Also, a slot 7 is formed by the teeth 22 adjacent to each other in the circumferential direction. The slot insulation member 3 is inserted into the slot 7. The slot insulation member 3 is formed of a resin film. As the resin film, various known resin materials can be used.

[0050] The stator winding 4 is wound around each tooth 22 (specifically, the teeth base portion) in a state where the slot insulation member 3 is inserted into the slot 7 and the electrical insulator assemblies 5 are arranged on both axial sides of the stator core 2. That is, the stator 1 of the present embodiment is a concentrated winding stator in which the stator winding 4 is wound around each tooth 22 in a concentrated winding method. Note that a rotor (not shown) is rotatably arranged in the central space 6 of the stator core 2. The motor of the present invention is constituted by the stator 1 and the rotor arranged in the central space 6.

[0051] FIG. 6 is a diagram showing an enlarged view of the portion surrounded by a circle in FIG. 5. As shown in FIG. 6, the electrical insulator assembly 5 is formed of a known insulating material having insulating properties. The electrical insulator assembly 5 is composed of an outer wall portion 51, a plurality of inner wall portions 52, and a plurality of connecting portions (not shown) connecting the outer wall portion 51 and the inner wall portions 52, as shown in FIG. 6.

[0052] The outer wall portion 51 extends along the axial direction and the circumferential direction. The inner wall portion 52 is disposed radially inward of the outer wall portion 51 and extends along the axial direction and the circumferential direction. The connecting portions (not shown) connect the outer wall portion 51 and the inner wall portions 52 by extending along the radial direction.

[0053] The inner wall portion 52 has a step space 53 on one side in the circumferential direction (the right side in FIG. 6) and a step space 54 on the other side in the circumferential direction (the left side in FIG. 6). The step space 53 is formed by step surfaces 53a, 53b. The step space 54 is formed by step surfaces 54a, 54b.

[0054] Next, the operation of inserting the phase insulation member 200 (300, 400) of the present invention into the slot 7 of the stator core 2 will be described. Hereinafter, the phase insulation member 200 will be described as an example, but the operation of inserting the phase insulation members 300, 400 is the same. When inserting the phase insulation member 200 into the slot 7 of the stator core 2, first, an external force is applied to the phase insulation member 200 from the outside so that the first central portion 106 and the second central portion 107 approach each other. As a result, the phase insulation member 200 contracts as shown in FIG. 5.

[0055] The contracted phase insulation member 200 is inserted into the slot 7 along the axial direction from one side in the axial direction (the upper side in FIG. 5) to the other side in the axial direction (the lower side in FIG. 5) of the stator 1 as indicated by the arrow in FIG. 5. Then, in a state where the phase insulation member 200 is inserted into the slot 7, when the external force applied to the phase insulation member 200 is released, the phase insulation member 200 deforms so as to expand the space between the first central portion 106 and the second central portion 107 by its elastic restoring force.

[0056] As a result, as shown in FIG. 6, the first edge portion 103 is inserted into the radial gap between the tooth tip portion 22a and the stator winding 4. At this time, the upper end surface of the first edge portion 103 is disposed below the step surface 54a that forms the step space 54 of the inner wall portion 52 of the electrical insulator assembly 5. Further, when the second edge portion 105 is inserted into the radial gap between the tooth tip portion 22a and the stator winding 4, the upper end surface of the second edge portion 105 is disposed below the step surface 53a that forms the step space 53 of the inner wall portion 52 of the electrical insulator assembly 5.

[0057] The electrical insulator assembly 5 attached to the other axial side (the lower side in FIG. 5) of the stator core 2 also has the same structure as that in FIG. 6. The phase insulation member 200 is inserted into the slot 7 in a reduced state, and then, in a state deformed so that the space between the first central portion 106 and the second central portion 107 expands due to the elastic restoring force, the first edge portion 103 and the second edge portion 105 are inserted into the radial gap between the tooth tip portion 22a and the stator winding 4, and the lower end surfaces of the first edge portion 103 and the second edge portion 105 are disposed on the step surfaces that form the step spaces of the inner wall portion 52 of the electrical insulator assembly 5. In this way, the phase insulation member 200 of the present invention is held in the slot 7 of the stator 1 in a non-swayable manner.

[0058] FIG. 7 is a partially enlarged plan view showing a state where the phase insulation member 200 is disposed in the slot 7. As shown in FIG. 7, in a state where the phase insulation member 200 is disposed in the slot 7, the phase insulation member 200 is interposed between the stator windings 4 of each phase wound around the teeth 22 of the stator core 2 via the electrical insulator assembly 5. By holding the phase insulation member 200 in the slot 7, the phase insulation member 200 can surely insulate between the stator windings 4 of each phase.

[0059] FIG. 8 is a cross-sectional view of the compressor 500 of the present invention. The compressor 500 includes a sealed container 510, a compression mechanism portion 520, an electric motor 530, a control board 540, and the like. The sealed container 510 has an inner peripheral surface 511 of the sealed container. An inner space of the sealed container is formed by the inner peripheral surface 511 of the sealed container.

[0060] The compressor mechanism section 520 and the electric motor 530 are housed inside the inner space of the sealed container. The compressor 500 of the present embodiment is configured as a horizontal compressor in which the electric motor 530 and the compressor mechanism section 520 are arranged side by side in the horizontal direction. An intake port 513 is provided above the electric motor 530 in the sealed container 510, and a discharge port 512 is provided on the right side of the electric motor 530. Note that lubricating oil to be supplied to the sliding part (for example, the bearing part 521) of the compressor mechanism section 520 is stored at the bottom of the sealed container 510 (below the electric motor 530).

[0061] The compressor mechanism section 520 compresses a refrigerant that transfers thermal energy. In the present embodiment, examples of the refrigerant include natural refrigerants with a low global warming potential (GWP), particularly carbon dioxide (R744), propane (R290), and ammonia (R717). Of course, various refrigerants other than carbon dioxide (R744), propane (R290), and ammonia (R717) can also be used. Note that when carbon dioxide (R744), propane (R290), or ammonia (R717) is used as the refrigerant, the inside of the sealed container 510 becomes high temperature and high pressure compared to when a fluorocarbon refrigerant or the like is used. For this reason, a lubricating oil with a high viscosity is used as the lubricating oil.

[0062] In the present embodiment, a scroll-type compressor mechanism section is used as the compressor mechanism section 520. Of course, compressor mechanism sections with various other configurations can be used. The compressor mechanism section 520 is composed of a fixed scroll section 522, a swash scroll section 523 rotated by a rotating shaft 531, and a compression chamber 524. The rotating shaft 531 is rotatably supported by bearing parts 532 and 533.

[0063] When the rotating scroll part 523 of the compression mechanism part 520 rotates due to the rotation of the rotating shaft 531, the refrigerant sucked from the suction port 513 flows through the gap 9 between the stator 1 and the rotor 8 and the slots 7 (see FIG. 7) of the stator 1, and is compressed (pressurized) in the compression chamber 524 of the compression mechanism part 520 and mixed with particulate lubricating oil. Then, the mixed gas containing the compressed refrigerant and particulate lubricating oil is discharged from the discharge port 512. In this way, the refrigerant in the form of a mixed gas flows through the gap 9 between the stator 1 and the rotor 8 and the slots 7 of the stator 1 to cool the stator winding 4 (see FIG. 7) constituting the electric motor 530.

[0064] In the present invention, since the opening (through hole) 108 is formed in the first central portion 106 of the phase insulation member 200 disposed in the slot 7, the mixed gas flowing in the slot 7 passes through the opening 108 and directly contacts the stator winding 4. Therefore, the cooling performance of the stator winding 4 can be improved.

[0065] The same effect can be achieved with the phase insulation member 300 shown in FIG. 2 and the phase insulation member 400 shown in FIG. 3. When the phase insulation member 300 shown in FIG. 3 is disposed in the slot 7, the mixed gas flowing in the slot 7 flows through the openings (through holes) 118a and 118b formed in the first central portion 116 and the second central portion 117 and directly contacts the stator winding 4, so that the stator winding 4 can be effectively cooled. When the phase insulation member 400 shown in FIG. 3 is disposed in the slot 7, the mixed gas flowing in the slot 7 flows through the openings (through holes) 128a to 128g formed in the first central portion 126 and the second central portion 127 and directly contacts the stator winding 4, so that the stator winding 4 can be effectively cooled.

[0066] In the phase insulation members 200, 300, and 400 of the present invention described above, in each case, the openings (through holes) 108, 118a, 118b, 128a to 128g provided in the first central portions 106, 116, 126 and the second central portions 107, 117, 127 are formed with different axial positions. That is, when the resin films 100, 110, 120 are bent to form the phase insulation members 200, 300, 400, the through holes 108, 118a, 118b, 128a to 128g are arranged at positions where they do not overlap in the circumferential direction (lateral direction). When the through holes 108, 118a, 118b, 128a to 128g are arranged in this way, the through holes 118b, 128e to 128g formed in the second central portions 107, 117, 127 are not positioned opposite to the through holes 108, 118a, 128a to 128d formed in the first central portions 106, 116, 126. Conversely, the through holes 108, 118a, 128a to 128d formed in the first central portions 106, 116, 126 are not positioned opposite to the through holes 118b, 128e to 128g formed in the second central portions 107, 117, 127. Therefore, while maintaining the insulation performance between the stator windings 4 of each phase, the cooling performance of the stator windings 4 can be improved through the through holes 108, 118a, 118b, 128a to 128g.

[0067] Incidentally, the mixed gas that has flowed through the gap 9 of the electric motor 530 and the slots 7 of the stator 1 returns to the inside of the sealed container 510, and the refrigerant and the lubricating oil are separated. A part of the separated lubricating oil flows downward through the gap 9 of the electric motor 530 and the slots 7 of the stator 1.

[0068] FIG. 9 is a diagram showing another embodiment of the phase insulation member of the present invention. The difference between the phase insulation member 200a shown in FIG. 9 and the phase insulation member 200 of the first embodiment is that the lateral widths of the first edge portion 103a and the second edge portion 105a are different. In the case of FIG. 9, the lateral width of the first edge portion 103a is w1, while the lateral width of the second edge portion 105a is w2, and they are in the relationship of w1 > w2.

[0069] FIG. 10 is a partially enlarged plan view showing a state in which the phase insulation member 200a is disposed in the slot 7. As shown in FIG. 10, in the state where the phase insulation member 200a is disposed in the slot 7, since the lateral width dimension w1 of the second edge portion 105a is larger than the lateral width dimension w2 of the first edge portion 103a, when both edge portions 103a and 105a are inserted into the radial gap (in the stepped spaces 53 and 54 of the inner wall portion 52 of the electrical insulator assembly 5) between the tooth tip portion 22a and the stator winding 4, due to the large protruding amount of the second edge portion 105a, it is disposed in an inclined state in the slot 7. Specifically, a wide space is formed between the radially inner side of the second central portion 107a of the phase insulation member 200a and the stator winding 4, and a wide space is formed between the radially outer side of the first central portion 106a and the stator winding 4.

[0070] As a result, the mixed gas flowing in the slot 7 can pass well through the motor 530 by utilizing this wide space, and the motor 530, particularly the stator winding 4, can be effectively cooled.

[0071] Further, when the phase insulation member 200a shown in FIG. 9 is disposed in the slot 7, the phase insulation member 200a can surely insulate between the stator windings 4 of each phase, and by directly contacting the mixed gas with the stator winding 4 through the opening (through hole) 108a formed in the first central portion 106a, the cooling performance of the stator winding 4 can be improved, which is the same as the cases of the other phase insulation members 200, 300, and 400.

[0072] Note that the phase insulation member 200a in FIG. 9 is illustrated for the case of having one opening (through hole) 108a in the first central portion 106a, similar to the phase insulation member 200 in Embodiment 1. However, it is natural that the lateral width dimensions of the first edge portions 113 and 123 and the second edge portions 115 and 125 of the phase insulation member having a plurality of openings (through holes), such as the phase insulation member 300 shown in FIG. 2 and the phase insulation member 400 shown in FIG. 3, may be made different.

[0073] Further, the lateral width dimension of either the first edges 103, 113, 123 or the second edges 105, 115, 125 may be increased. When the lateral width dimension of the first edges 103, 113, 123 is made larger than that of the second edges 105, 115, 125, it is obvious that the inclination of the phase-intermittent insulating member 200a (300a, 400a) shown in FIG. 10 is reversed, and thus it will not be described in detail.

[0074] As described above, according to the phase-intermittent insulating member of the present invention, since the mixed gas can flow through the opening formed in the first central portion or the second central portion, the mixed gas can be directly brought into contact with the stator winding, and the stator winding, and thus the cooling of the motor can be efficiently performed.

[0075] Also, since the positions of the openings provided in both the first central portion and the second central portion of the phase-intermittent insulating member are shifted, the stator winding can be cooled by the mixed gas without impairing the insulation effect between the stator windings of each phase.

[0076] Furthermore, by making the widthwise dimensions of the first edge and the second edge of the phase-intermittent insulating member different, when the phase-intermittent insulating member is arranged between the stator windings, the first central portion and the second central portion are arranged between the stator windings in a state inclined from the radial direction, so that the area where the refrigerant contacts the stator winding is enlarged, and the cooling effect can be further enhanced.

Industrial Applicability

[0077] The present invention is applicable to a motor assembled in a compressor.

Explanation of Signs

[0078] 1 Stator 2 Stator Core 2A, 2B Core End Faces 3 Slot Insulating Member 4 Stator Winding 5 Electrical Insulator Assembly 6 Central Space 7 Slot 8 Rotor 9 Gap 21 Yoke 22 Teeth 22a Tooth tip 22b Tooth tip surface 51 Outer wall part 52 Inner wall part 53, 54 Step space 53a, 53b, 54a, 54b Step surface 100, 110, 120 Resin film 101, 101a, 111, 121 Central bending part 102, 102a, 112, 122 First bending part 103, 103a, 113, 123 First edge 104, 104a, 114, 124 Second bending part 105, 105a, 115, 125 Second edge 106, 106a, 116, 126 First central part 107, 107a, 117, 127 Second central part 108, 108a, 118a, 118b, 128a~128g Opening (through hole) 200, 200a, 300, 400 Interphase insulation member 500 Compressor 510 Sealed container 511 Inner peripheral surface of sealed container 512 Discharge port 513 Suction port 520 Rear part of compressor 521, 532, 533 Bearing part 522 Fixed scroll part 523 Swinging scroll part 524 Compression chamber 530 Electric motor 531 Rotating shaft 540 Control board

Claims

1. A phase insulation member disposed between stator windings wound around adjacent teeth, comprising a first central portion and a second central portion that are bent in a V shape at a central bending portion along the axial direction, a first edge extending from the V-shaped open side of the first central portion toward one side in the circumferential direction, and a second edge extending from the V-shaped open side of the second central portion toward the other side in the circumferential direction, and an opening provided in either the first central portion or the second central portion. A phase insulation member characterized by this.

2. A phase insulation member disposed between stator windings wound around adjacent teeth, comprising a first central portion and a second central portion that are bent in a V shape at a central bending portion along the axial direction, a first edge extending from the V-shaped open side of the first central portion toward one side in the circumferential direction, and a second edge extending from the V-shaped open side of the second central portion toward the other side in the circumferential direction, and openings provided in both the first central portion and the second central portion, and the positions of the opening in the first central portion and the opening in the second central portion are arranged offset from each other. A phase insulation member characterized by this.

3. The phase insulation member according to claim 2, characterized in that the opening in the first central portion and the opening in the second central portion are each provided in a plurality.

4. A phase insulation member disposed between stator windings wound around adjacent teeth, comprising a first central portion and a second central portion that are bent in a V shape at a central bending portion along the axial direction, a first edge extending from the V-shaped open side of the first central portion toward one side in the circumferential direction, and a second edge extending from the V-shaped open side of the second central portion toward the other side in the circumferential direction, and an opening provided in either the first central portion or the second central portion, and the widthwise dimensions of the first edge and the second edge are made different. A phase insulation member characterized by this.

5. A phase insulation member disposed between stator windings wound around adjacent teeth, comprising a first central portion and a second central portion bent in a V shape at a central bending portion along the axial direction, a first edge extending from the V-shaped open side of the first central portion toward one circumferential side, and a second edge extending from the V-shaped open side of the second central portion toward the other circumferential side, openings are provided in both the first central portion and the second central portion, the positions of the opening in the first central portion and the opening in the second central portion are arranged to be offset, and the widthwise dimensions of the first edge and the second edge are made different, characterized in that it is a phase insulation member.

6. A phase insulation member disposed between stator windings wound around adjacent teeth, comprising a first central portion and a second central portion bent in a V shape at a central bending portion along the axial direction, a first edge extending from the V-shaped open side of the first central portion toward one circumferential side, and a second edge extending from the V-shaped open side of the second central portion toward the other circumferential side, a plurality of openings are provided in both the first central portion and the second central portion, the positions of the opening in the first central portion and the opening in the second central portion are arranged to be offset, and the widthwise dimensions of the first edge and the second edge are made different, characterized in that it is a phase insulation member.

7. A stator, characterized in that it is configured to include the phase insulation member according to any one of Claims 1 to 6.

8. An electric motor, characterized in that it is configured to include the stator according to Claim 7.

9. A compressor, characterized in that it is configured to include the electric motor according to Claim 8.

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