Insulation film, motor, compressor, and apparatus

Abstract

To provide an insulation film capable of easily performing a production or a design change corresponding to a wire diameter of a coil, improving alignment property of the coil by means of a coil guide groove and improving efficiency of a motor, a motor using the insulation film, a compressor using the motor, and an apparatus using the compressor.SOLUTION: An insulation film comprises: a teeth part insulation face 61 abutting on circumferential side faces of stator teeth 32; a slot part insulation face 62 abutting on an inner peripheral surface of a stator yoke 31, extending into a slot 33 and insulating coils 41 adjacent to each other; and a teeth tip expansion part insulation face 63 abutting on an inner peripheral surface of a stator teeth tip expansion part 32B. On the teeth part insulation face 61, a plurality of coil guide grooves 64 extending from an upper end to a lower end is formed in a direction of a rotary shaft 4.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an insulating film, an electric motor using the insulating film, a compressor using the electric motor, and an apparatus using the compressor. [Background technology]

[0002] In the stator of a split-core type electric motor, there is a structure in which insulating films are placed on the left and right sides of the side of the stator core on which the windings are wound, and insulators are attached to the stator core from above and below the insulating films (for example, Patent Document 1 and Patent Document 2). Furthermore, in order to wind the windings in an aligned manner, there is a structure in which grooves are formed in advance on the surface of the insulator on which the windings are wound, at a pitch equivalent to the wire diameter of the windings (for example, Patent Document 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-111329 [Patent Document 2] Japanese Patent Application Publication No. 2018-198515 [Patent Document 3] International Publication No. 2019 / 117207 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the structures of Patent Documents 1 and 2, the insulator has an umbrella portion that covers the insulating film from the outside, and the umbrella portion reduces the area where the winding is wound, lowering the space factor of the winding and reducing the performance of the motor. Furthermore, when grooves are formed in the insulator as in Patent Document 3, the wire diameter of the winding is limited to a specific one, and if a different wire diameter is desired for a different model, a new molding die for the insulator must be created or modified, resulting in a lack of productivity and design flexibility.

[0005] Therefore, an object of the present invention is to provide an insulating film that can be easily manufactured and its design modified to suit the wire diameter of the windings, that can improve the alignment of the windings by using winding guide grooves, and that can improve the efficiency of the motor, as well as an electric motor using this insulating film, a compressor using this electric motor, and an apparatus using this compressor. [Means for solving the problem]

[0006] In the insulating film 60 of the present invention as set forth in claim 1, split stators 30A are arranged in a circular ring shape, each split stator 30A being divided into a plurality of pieces for each stator tooth 32, and the split stators 30A have an arc-shaped stator yoke 31 centered on the rotation axis 4 of the rotor 20, and the stator teeth 32 extending from the stator yoke 31 toward the rotor 20, and the stator teeth 32 have stator tooth bases 32A around which windings 41 are wound and stator tooth tip extensions 32B formed at the tips of the stator tooth bases 32A, and slots 33 are formed between adjacent split stators 30A. The insulating film 60 electrically insulates the windings 41 wound around the stator tooth bases 32A, and is characterized in that it comprises: tooth insulating surfaces 61 that abut against the circumferential side surfaces of the stator teeth 32; slot insulating surfaces 62 that abut against the inner peripheral surface of the stator yoke 31 and extend into the slots 33 to insulate adjacent windings 41; and tooth tip extension insulating surfaces 63 that abut against the inner peripheral surfaces of the stator tooth tip extensions 32B, and that a plurality of winding guide grooves 64 extending from the upper end to the lower end are formed in the tooth insulating surfaces 61 in the direction of the rotating shaft 4. The present invention according to a second aspect is characterized in that in the insulating film 60 according to the first aspect, the winding guide grooves 64 are formed to match the wire diameter pitch of the windings 41. The present invention described in claim 3 is characterized in that, in the insulating film 60 described in claim 1, the tooth portion insulating surface 61, the slot portion insulating surface 62, and the tooth tip extension portion insulating surface 63 are formed by a rectangular film, and the tooth portion insulating surface 61 and the slot portion insulating surface 62 are bent, and the tooth portion insulating surface 61 and the tooth tip extension portion insulating surface 63 are bent. The present invention according to a fourth aspect is characterized in that in the insulating film 60 according to the first aspect, the winding guide grooves 64 are not formed on the slot portion insulating surface 62 and the tooth tip extension portion insulating surface 63 . The electric motor 14 of the present invention described in claim 5 is an electric motor 14 using the insulating film 60 described in claim 1, characterized in that the rotor 20 is arranged on the inner circumference of the split stator 30A arranged in a circular ring shape, insulators 50 are arranged on both end faces of the split stator 30A in the sheet stacking direction, and the insulating film 60 is fixed to the insulator 50 by welding. The electric motor 14 of the present invention described in claim 6 is an electric motor 14 using the insulating film 60 described in claim 1, characterized in that the rotor 20 is arranged on the inner circumference of the split stator 30A arranged in a circular ring shape, insulators 50 are arranged on both end faces of the split stator 30A in the sheet stacking direction, and the insulating film 60 is fixed to the insulator 50 or the split stator 30A with an adhesive. The compressor 10 of the present invention described in claim 7 is a compressor 10 using the electric motor 14 described in claim 5, characterized in that a compression mechanism unit 13 is connected to the rotating shaft 4 and the refrigerant is compressed by the compression mechanism unit 13. The compressor 10 of the present invention described in claim 8 is a compressor 10 using the electric motor 14 described in claim 6, characterized in that a compression mechanism unit 13 is connected to the rotating shaft 4, the refrigerant is compressed by the compression mechanism unit 13, and the adhesive has refrigerant resistance, oil resistance, and heat resistance. The present invention as set forth in claim 9 is characterized in that in the compressor 10 as set forth in claim 8, the adhesive is an epoxy adhesive. The device of the present invention described in claim 10 is a device using the compressor 10 described in any one of claims 7 to 9, characterized in that the compressor 10, the condenser 17, the pressure reducing device 18, and the evaporator 19 are connected in a ring shape by piping. [Effects of the Invention]

[0007] According to the present invention, since the winding guide grooves are formed in the insulating film, manufacturing and design changes according to the wire diameter can be easily carried out compared to when the winding guide grooves are formed in the insulator, and the winding guide grooves can improve the alignment of the windings, thereby improving the efficiency of the motor. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating a compressor using an insulating film according to an embodiment of the present invention and a refrigeration device using the compressor; [Figure 2] 1 is a perspective view of a main part of an electric motor according to an embodiment of the present invention; [Figure 3] FIG. 1 is an exploded perspective view showing a split stator according to the present embodiment. [Figure 4] FIG. 10 is a perspective view showing an attached state of the insulating film according to the present embodiment. [Figure 5] 1 is a diagram showing another embodiment of a compressor using a scroll compressor, and a configuration diagram of a refrigeration system using this compressor. DETAILED DESCRIPTION OF THE INVENTION

[0009] An insulating film according to a first embodiment of the present invention includes a teeth insulating surface that abuts against the circumferential side surfaces of the stator teeth, a slot insulating surface that abuts against the inner peripheral surface of the stator yoke and extends into the slot to insulate adjacent windings, and a teeth tip extension insulating surface that abuts against the inner peripheral surface of the stator tooth tip extension, and the teeth insulating surface has multiple winding guide grooves formed in it from the upper end to the lower end in the direction of the rotation axis. According to this embodiment, because the winding guide grooves are formed in the insulating film, manufacturing and design changes according to the winding wire diameter are easier than when they are formed in the insulator, and the winding guide grooves improve the winding alignment and the efficiency of the electric motor.

[0010] In the second embodiment of the present invention, the winding guide grooves are formed in accordance with the wire diameter pitch of the windings in the insulating film according to the first embodiment, thereby improving the alignment of the windings.

[0011] The third embodiment of the present invention is an insulating film according to the first embodiment, in which a rectangular film is used to form the insulating surfaces of the teeth, slots, and teeth-tip extensions, and the insulating surfaces of the teeth and slots are folded between each other, and the insulating surfaces of the teeth and teeth-tip extensions are folded between each other. This embodiment improves processability and facilitates manufacturing.

[0012] In the fourth embodiment of the present invention, the insulating film according to the first embodiment does not have winding guide grooves on the insulating surface of the slot portion and the insulating surface of the protruding tip portion of the teeth. This embodiment allows the winding to be smoothly guided to the base of the stator teeth, improving the winding alignment.

[0013] The electric motor according to the fifth embodiment of the present invention is the electric motor using the insulating film according to the first embodiment, in which a rotor is disposed on the inner periphery of the split stator arranged in an annular shape, insulators are disposed on both end faces of the split stator in the sheet lamination direction, and the insulating film is fixed to the insulator by welding. According to this embodiment, the insulating film can be fixed to the insulator without adding a structure for fixing it to the insulating film or insulator, and displacement of the insulating film can be prevented.

[0014] The electric motor of the sixth embodiment of the present invention is the electric motor using the insulating film of the first embodiment, in which a rotor is disposed on the inner periphery of the split stator arranged in an annular shape, insulators are disposed on both end faces of the split stator in the sheet lamination direction, and the insulating film is fixed to the insulator or the split stator with an adhesive. According to this embodiment, the insulating film can be fixed to the insulator without adding a structure for fixing it to the insulating film or insulator, and displacement of the insulating film can be prevented.

[0015] A compressor according to a seventh embodiment of the present invention is a compressor using the electric motor according to the fifth embodiment, in which a compression mechanism is connected to the rotating shaft and the refrigerant is compressed by the compression mechanism. According to this embodiment, a compressor with a highly efficient electric motor can be provided.

[0016] A compressor according to an eighth embodiment of the present invention is a compressor using the electric motor according to the sixth embodiment, in which a compression mechanism is connected to the rotating shaft, the refrigerant is compressed by the compression mechanism, and the adhesive has refrigerant resistance, oil resistance, and heat resistance. According to this embodiment, a compressor with a high efficiency electric motor can be provided without being affected by the adhesive.

[0017] A ninth embodiment of the present invention is such that the adhesive in the compressor according to the eighth embodiment is an epoxy adhesive, which is free from the influence of the adhesive.

[0018] The device according to the tenth embodiment of the present invention is a device using the compressor according to any one of the seventh to ninth embodiments, and has a compressor, a condenser, a pressure reducing device, and an evaporator connected in a ring shape by piping. According to this embodiment, a device with high motor efficiency and excellent compression performance can be realized. [Example]

[0019] A compressor according to an embodiment of the present invention will be described below, but the present invention is not limited to the following embodiment.

[0020] 1 is a configuration diagram of a compressor using an insulating film according to this embodiment and a refrigeration system using this compressor. The compressor according to this embodiment is a rotary compressor. A suction pipe 2 for drawing in a refrigerant and a discharge pipe 3 for discharging the refrigerant are connected to the sealed container 1. Inside the sealed container 1, there are disposed a compression mechanism 13 for compressing the refrigerant drawn in through the suction pipe 2 and an electric motor 14 for driving the compression mechanism 13. The bottom of the sealed container 1 serves as an oil reservoir 11. The compression mechanism 13 is composed of a cylinder 13a, a piston 13b, a vane (not shown), a main bearing 13c, and an auxiliary bearing 13d. The main bearing 13c is fixed to the sealed container 1. The piston 13b is rotatably fitted to an eccentric portion 4a of a rotary shaft 4 that passes through the cylinder 13a. The vane reciprocates in the vane groove following the piston 13b that rolls along the inner wall surface of the cylinder 13a. The main bearing 13c and the auxiliary bearing 13d seal the upper and lower end surfaces of the cylinder 13a and support the rotary shaft 4. The electric motor 14 comprises a stator 30 fixed to the sealed container 1 and a rotor 20 arranged on the inner periphery of the stator 30. The rotor 20 is fixed to the rotating shaft 4, and the stator 30 is fixed to the sealed container 1. The refrigerant is drawn into the compression mechanism 13 through the suction pipe 2 and compressed in the compression mechanism 13. Thereafter, the refrigerant passes through the electric motor 14 and is discharged from the discharge pipe 3.

[0021] In the refrigeration system according to this embodiment, a compressor 10, a condenser 17, a pressure reducing device 18, and an evaporator 19 are connected in a ring shape by piping. The condenser 17 condenses the refrigerant discharged from the discharge pipe 3, the pressure reducing device 18 reduces the pressure of the refrigerant condensed in the condenser 17, and the evaporator 19 evaporates the refrigerant reduced in pressure by the pressure reducing device 18. The refrigerant evaporated in the evaporator 19 is returned to the compressor 10 via the accumulator 16 .

[0022] 2A and 2B are perspective views of the main part of the electric motor according to this embodiment, where FIG. 2A is a perspective view of the rotor and stator, and FIG. 2B is a perspective view of only the stator. The rotor 20 has a rotor core 21 formed into a cylindrical shape by laminating rotor core plates, and permanent magnets 22 arranged in slits formed on the outer periphery of the rotor core 21. The rotor 20 has a plurality of permanent magnets 22 arranged around the rotating shaft 4. The rotor core plate is an electromagnetic steel plate with a thickness of 0.7 mm or less, and the rotor core 21 is made of a magnetic material. Rotor core 21 has a through hole 23 in the center in which rotating shaft 4 is disposed, and is provided with a plurality of rotor refrigerant passages 24 in the axial direction around through hole 23. A plurality of rotor refrigerant passages 24 are formed concentrically between through hole 23 and permanent magnet 22. The stator 30 is disposed with an air gap between it and the rotor 20. The stator 30 is constructed by laminating stator core plates in the axial direction of the rotating shaft 4. The stator core plates are electromagnetic steel plates with a thickness of 0.7 mm or less, and the stator 30 is constructed of a magnetic material. The stator 30 is configured by dividing the stator into a plurality of stator segments 30A, each segment corresponding to a stator tooth 32 (see FIG. 3), and arranging the stator segments 30A in an annular shape. A winding 41 is wound around each of the stator segments 30A.

[0023] FIG. 3 is an exploded perspective view showing the split stator according to this embodiment. As shown in FIG. 3, the split stator 30A has an arc-shaped stator yoke 31 centered on the rotation axis 4 of the rotor 20, and a plurality of stator teeth 32 extending from the stator yoke 31 toward the rotor 20. Stator teeth 32 have stator teeth bases 32A around which windings 41 are wound, and stator teeth tip extensions 32B formed at the tips of stator teeth bases 32A. Stator teeth tip extensions 32B are formed to extend outward on both sides beyond the circumferential width of stator teeth bases 32A. A slot 33 is formed between adjacent stator segments 30A. 2, a winding 41 is wound around the stator tooth base 32A. The winding 41 is arranged in the slot 33. The stator yoke 31 has a fixing recess 34 .

[0024] The stator split 30A is provided with an insulator 50. The insulators 50 are disposed on both end surfaces of the stator split 30A in the sheet stacking direction. The insulator 50 has an insulator yoke portion 51 located on the stator yoke 31, an insulator tooth base portion 52 located on the stator tooth base portion 32A, an insulator tooth tip portion 53 located on the stator tooth tip extension portion 32B, and a fixing protrusion portion 54 provided on the insulator yoke portion 51. Further, insulator tooth tip portion 53 is formed with locking projections 55 that come into contact with both side surfaces of stator tooth tip extension portion 32B. The insulators 50 are attached to both end surfaces of the split stator 30A by fitting the locking projections 55 into the fixing recesses .

[0025] Insulating film 60 electrically insulates winding 41 from stator segment 30A. The insulating film 60 includes a tooth portion insulating surface 61 that abuts against the circumferential side surface of the stator tooth 32, a slot portion insulating surface 62 that abuts against the inner peripheral surface of the stator yoke 31 and extends into the slot 33 to insulate adjacent windings 41, and a tooth tip extension insulating surface 63 that abuts against the inner peripheral surface of the stator tooth tip extension portion 32B. A plurality of winding guide grooves 64 are formed in the tooth insulating surface 61 in the direction of the rotary shaft 4 from the upper end to the lower end. The winding guide grooves 64 are formed to match the wire diameter pitch of the windings 41 . As described above, according to this embodiment, since the winding guide grooves 64 are formed in the insulating film 60, manufacturing and design changes according to the wire diameter of the windings 41 can be easily carried out compared to when the winding guide grooves 64 are formed in the insulator 50, and the winding guide grooves 64 can improve the alignment of the windings 41, thereby improving the efficiency of the motor. Insulating film 60 is a rectangular film that forms teeth insulating surfaces 61, slot insulating surfaces 62, and teeth tip protrusion insulating surfaces 63. The area between teeth insulating surfaces 61 and slot insulating surfaces 62 is bent, and the area between teeth insulating surfaces 61 and teeth tip protrusion insulating surfaces 63 is also bent. In this way, the insulating film 60 can be formed by folding a rectangular film, which improves workability and facilitates manufacturing. By not forming the winding guide grooves 64 on the slot portion insulating surface 62 and the tooth tip protrusion insulating surface 63, the windings 41 can be smoothly guided to the stator tooth bases 32A, improving the alignment of the windings 41.

[0026] Figure 4 is a perspective view showing the installation state of the insulating film according to this embodiment, where Figure 4(a) is a perspective view showing the state in which the insulating film is placed on the split stator, Figure 4(b) is a perspective view showing the state in which the insulating film is fixed to the insulator, and Figure 4(c) is a perspective view showing the relationship with the windings. 4(a), the insulating film 60 has the tooth portion insulating surface 61 abutting against the circumferential side surface of the stator tooth 32. A portion of the slot portion insulating surface 62 abuts against the inner peripheral surface of the stator yoke 31, and the tooth tip extension portion insulating surface 63 abuts against the inner peripheral surface of the stator tooth tip extension portion 32B. The tooth tip extension portion insulating surface 63 is locked by the locking protrusion 55. Then, as shown in Fig. 4(b), the insulating film 60 is fixed to the insulator 50 by welding. The welded portions 71 shown in Fig. 4(b) and Fig. 4(c) are the welding points. As shown in the figures, the insulating film 60 is fixed to the two insulators 50, upper and lower, by welding. In this way, by fixing the insulating film 60 to the insulator 50 by welding, the insulating film 60 can be fixed to the insulator 50 without adding any structure for fixing the insulating film 60 to the insulator 50, and the insulating film 60 can be prevented from shifting.

[0027] 4 shows a case where the insulating film 60 is fixed to the insulator 50 by welding, but the insulating film 60 may also be fixed to the insulator 50 by adhesive. When fixing by adhesive, the insulating film 60 may also be adhered to the split stator 30A. In this way, by fixing the insulating film 60 to the insulator 50 or the split stator 30A with adhesive, the insulating film 60 can be fixed to the insulator 50 or the split stator 30A without adding any structure for fixing the insulating film 60 to the insulator 50, thereby preventing the insulating film 60 from shifting. When the electric motor 14 using the insulating film 60 according to this embodiment is used in the compressor 10, an adhesive having refrigerant resistance, oil resistance, and heat resistance is suitable, and it is preferable to use an epoxy-based adhesive.

[0028] As shown in FIG. 4(c), the winding 41 is wound along a winding guide groove 64 formed in the insulating surface 61 of the teeth. The winding guide grooves 64 are formed to match the wire diameter pitch of the windings 41, thereby improving the alignment of the windings 41.

[0029] FIG. 5 is a configuration diagram of a compressor showing another embodiment using a scroll compressor, and a refrigeration system using this compressor. The compressor 10 according to this embodiment includes, in a sealed container 1, a compression mechanism 13 for compressing refrigerant gas, and an electric motor 14 for driving the compression mechanism 13. The inside of the sealed container 1 is divided into one container space and the other container space by the compression mechanism part 13. An electric motor 14 is disposed in the other container space. The other space within the container is divided into a compression mechanism space and an oil storage space by the electric motor 14. An oil storage section 11 is disposed in the oil storage space. A suction pipe 2 and a discharge pipe 3 are fixed to the sealed container 1 by welding. The suction pipe 2 and the discharge pipe 3 lead to the outside of the sealed container 1 and are connected to components that make up the refrigeration cycle. The suction pipe 2 introduces refrigerant gas from the outside of the sealed container 1, and the discharge pipe 3 discharges refrigerant gas from one of the container spaces to the outside of the sealed container 1.

[0030] The main bearing member 7a is fixed inside the sealed container 1 by welding, shrink fitting, or the like, and supports the rotating shaft 4. One end of the rotating shaft 4 is supported by the main bearing member 7a, and the other end is supported by a bearing 7b. A fixed scroll 13j is bolted to this main bearing member 7a. An orbiting scroll 13k that meshes with the fixed scroll 13j is sandwiched between the main bearing member 7a and the fixed scroll 13j. The fixed scroll 13j and the orbiting scroll 13k constitute a scroll-type compression mechanism 13. A rotation restraint mechanism 9 such as an Oldham ring is provided between the orbiting scroll 13k and the main bearing member 7a. The rotation restraint mechanism 9 prevents the orbiting scroll 13k from rotating on its axis and guides the orbiting scroll 13k to move in a circular orbit. The orbiting scroll 13k is eccentrically driven by an eccentric portion 4a provided at the upper end of the rotary shaft 4. Due to this eccentric drive, the compression chamber formed between the fixed scroll 13j and the orbiting scroll 13k moves from the outer periphery toward the center of the compression mechanism portion 13, reducing its volume and performing compression.

[0031] The electric motor 14 has a rotor 20 arranged to rotate freely around the rotating shaft 4, and a stator 30 arranged with a gap between the rotor 20. The configuration of the electric motor 14 is the same as that shown in Fig. 2, and therefore a description thereof will be omitted.

[0032] The refrigerant is drawn into the compression mechanism 13 through the suction pipe 2 and compressed in the compression mechanism 13. Thereafter, the refrigerant is discharged from the discharge pipe 3. In the refrigeration system according to this embodiment, a compressor 10, a condenser 17, a pressure reducing device 18, and an evaporator 19 are connected in a ring shape by piping. The condenser 17 condenses the refrigerant discharged from the discharge pipe 3, the pressure reducing device 18 reduces the pressure of the refrigerant condensed in the condenser 17, and the evaporator 19 evaporates the refrigerant reduced in pressure by the pressure reducing device 18. The refrigerant evaporated in the evaporator 19 is returned to the compressor 10 through the suction pipe 2 .

[0033] As shown in FIGS. 1 and 5, the electric motor 14 according to this embodiment is suitable for a compressor 10 in which a compression mechanism 13 is connected to a rotary shaft 4 and the compression mechanism 13 compresses a refrigerant. Although the present embodiment has been described using a vertical compressor 10, a horizontal compressor 10 is equally effective and is suitable for, for example, an in-vehicle compressor. Also, although Fig. 1 shows a rotary compressor and Fig. 5 shows a scroll compressor, a reciprocating compressor or other compressors may also be used. Low noise is particularly required for on-vehicle compressors, so the use of the electric motor 14 according to this embodiment, which can achieve high efficiency and low vibration, is highly effective in reducing noise due to low vibration. Furthermore, in a refrigeration system in which the compressor 10 using the electric motor 14 according to this embodiment is connected in a ring shape with piping together with the condenser 17, pressure reducing device 18, and evaporator 19, low noise due to low vibration and high efficiency can be achieved without reducing torque.

[0034] As described above, the compressor 10 according to this embodiment has the compression mechanism 13 connected to the rotary shaft 4 and compresses the refrigerant by the compression mechanism 13, and can provide a compressor 10 with a high motor efficiency. Furthermore, the compressor 10 according to this embodiment has a compression mechanism 13 connected to the rotating shaft 4, and the refrigerant is compressed by the compression mechanism 13. The adhesive used for the insulating film 60 has refrigerant resistance, oil resistance, and heat resistance, so that a compressor with a highly efficient motor can be provided without being affected by the adhesive. [Industrial Applicability]

[0035] The compressor of the present invention is useful for appliances such as hot water heating systems, indoor air conditioners, vehicle air conditioners, water heaters, refrigerators, showcases, chillers, and freezers. [Explanation of symbols]

[0036] 1. Airtight container 2 Suction pipe 3 Discharge pipe 4 rotation axes 4a Eccentric part 7a Main bearing member 7b Bearing 9 Rotation restraint mechanism 10 Compressor 11 Oil reservoir 13 Compression mechanism 13a Cylinder 13b Piston 13c Main bearing 13d Sub bearing 13j Fixed Scroll 13k Swivel Scroll 14 Electric motor 16 Accumulator 17 Condenser 18 Pressure reducing device 19 Evaporator 20 rotor 21 Rotor core 22 Permanent magnets 23 Through hole 24 Rotor refrigerant passage 30 Stator 30A split stator 31 Stator yoke 32 stator teeth 32A Stator teeth base 32B Stator teeth tip extension 33 slots 34 Fixing recess 41 Windings 50 insulator 51 Insulator yoke 52 Insulator tooth base 53 Insulator tooth tip 54 Fixing protrusion 55 Locking protrusion 60 Insulating film 61 Teeth insulating surface 62 Slot insulation surface 63 Teeth tip extension insulation surface 64 Winding guide groove 71 Welded area

Claims

1. The stator is divided into multiple pieces for each stator tooth and arranged in a circular pattern. the split stator has an arc-shaped stator yoke centered on the rotation axis of the rotor, and the stator teeth extending from the stator yoke toward the rotor, The stator teeth each have a stator teeth base portion around which a winding is wound, and a stator teeth tip extension portion formed at a tip of the stator teeth base portion, A slot is formed between adjacent split stators, an insulating film that electrically insulates the winding wound around the stator tooth base, a tooth portion insulating surface that abuts against a circumferential side surface of the stator tooth; a slot insulating surface that abuts against an inner peripheral surface of the stator yoke and extends into the slot to insulate the adjacent windings; a teeth tip extension insulating surface that is brought into contact with an inner peripheral surface of the stator teeth tip extension portion; Equipped with A plurality of winding guide grooves are formed in the insulating surfaces of the teeth from the upper end to the lower end in the direction of the rotation axis. An insulating film characterized by:

2. The winding guide groove is formed to match the wire diameter pitch of the winding. The insulating film according to claim 1 .

3. the teeth insulating surface, the slot insulating surface, and the teeth tip protrusion insulating surface are formed by a rectangular film; The tooth insulating surface and the slot insulating surface are bent, The insulating surface of the teeth portion and the insulating surface of the tooth tip extension portion are bent. The insulating film according to claim 1 .

4. The winding guide grooves are not formed on the insulating surfaces of the slot portions and the insulating surfaces of the tooth tip extension portions. The insulating film according to claim 1 .

5. An electric motor using the insulating film according to claim 1, the rotor is disposed on the inner periphery of the divided stators which are arranged in an annular shape; Insulators are disposed on both end surfaces of the split stator in the sheet lamination direction, The insulating film is fixed to the insulator by welding. An electric motor characterized by:

6. An electric motor using the insulating film according to claim 1, the rotor is disposed on the inner periphery of the divided stators which are arranged in an annular shape; Insulators are disposed on both end surfaces of the split stator in the sheet lamination direction, The insulating film is fixed to the insulator or the split stator with an adhesive. An electric motor characterized by:

7. A compressor using the electric motor according to claim 5, A compression mechanism is connected to the rotary shaft, The refrigerant is compressed by the compression mechanism. A compressor characterized by:

8. A compressor using the electric motor according to claim 6, A compression mechanism is connected to the rotary shaft, The refrigerant is compressed by the compression mechanism, The adhesive has refrigerant resistance, oil resistance, and heat resistance. A compressor characterized by:

9. The adhesive was an epoxy adhesive.

9. The compressor according to claim 8.

10. A device using the compressor according to any one of claims 7 to 9, The compressor, the condenser, the pressure reducing device, and the evaporator are connected in a ring shape by piping. The device characterized by:

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