compressor

Abstract

The compressor (1) includes: a stator core (63) formed in a cylindrical shape and having a yoke (64), a tooth portion (65) and a slot (66); a rotor (61) arranged on the inner side of the stator core (63); a compression portion (5) compressing a refrigerant by the rotation of the rotor (61) relative to the stator core (63); a container (2) having a space formed therein for arranging the stator core (63) and the compression portion (5); a winding (68) wound on the tooth portion (65) of the stator core (63); and an insulating film (69) separating the winding (68) from the stator core (63) and arranged in the slot (66). A welding portion (W) is formed on the side surface on the outer diameter side of the yoke (64) and is fixed to the container (2) by welding, and a sheet-like member is provided in a groove (66) corresponding to the welding portion (W) in the circumferential direction of the stator core (63), and the sheet-like member is interposed between the yoke (64) and the insulating film (69).

Description

Technical Field

[0001] The invention relates to a compressor. Background Art

[0002] It is known that an insulating film for electrically insulating a stator core and a winding of a motor provided in a compressor may melt due to the heat when a back yoke portion of the stator core is welded to a housing, and in this case, poor insulation between the stator core and the winding may occur. A compressor is known in which a concave portion that is recessed toward the outer diameter side of the stator core is formed in a portion of the back yoke portion of the stator core facing the slot, thereby suppressing the melting of the insulating film due to the heat during welding (Patent Document 1).

[0003] Patent Document 1: Japanese Patent Application Publication No. 2011-12667 Summary of the invention

[0004] However, since the magnetic flux density of the portion of the back yoke facing the slot is high, the formation of the recessed portion has a significant effect on the increase in magnetic resistance. As a result, the compressor has a problem of reducing the motor efficiency and thus reducing the compression efficiency.

[0005] The technology of the present application has been made in view of the above circumstances, and aims to provide a compressor capable of suppressing a decrease in motor efficiency while appropriately electrically insulating a stator core and a winding of a motor.

[0006] A compressor according to one embodiment of the present application includes: a stator core formed in a cylindrical shape and having a yoke, a tooth portion and a slot; a rotor arranged on the inner side of the stator core; a compression portion that compresses the refrigerant by rotating the rotor relative to the stator core; a container having a space formed inside for arranging the stator core and the compression portion; a winding wound on the tooth portion of the stator core; and an insulating film that separates the winding from the stator core and is arranged in the slot. A welding portion that is fixed to the container by welding is formed on the side surface on the outer diameter side of the yoke. In the circumferential direction of the stator core, in the slot corresponding to the welding portion, a sheet-like member is provided, and the sheet-like member is interposed between the yoke and the insulating film.

[0007] The compressor of the present application can suppress a decrease in motor efficiency while appropriately electrically insulating a stator core and a winding of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a longitudinal sectional view showing the compressor of the embodiment.

[0009] Figure 2 It is an exploded perspective view showing a stator of the compressor according to the embodiment.

[0010] Figure 3 This is another exploded perspective view showing the stator of the compressor according to the embodiment.

[0011] Figure 4 It is a top view showing the groove of the compressor according to the embodiment. DETAILED DESCRIPTION

[0012] Hereinafter, the compressor according to the embodiment disclosed in the present application will be described with reference to the accompanying drawings. In addition, the following content does not constitute a limitation on the technology of the present application. In addition, in the following description, the same symbol is given to the same component, and repeated description is omitted.

[0013] Example

[0014] like Figure 1 As shown, the compressor 1 includes a container 2 , a shaft 3 , a compression unit 5 , and a motor unit 6 . Figure 1 2 is a longitudinal sectional view of the compressor 1 of the embodiment. A sealed internal space 21 is formed inside the container 2. The internal space 21 is formed in a substantially cylindrical shape. The container 2 is formed so that, when placed upright on a horizontal plane, the central axis of the cylinder of the internal space 21 is parallel to the vertical direction. The container 2 includes a suction pipe 22 and a discharge pipe 23. The suction pipe 22 has a flow path 221 formed inside, and is joined to the container 2 in such a way that the flow path 221 is connected to the lower part of the internal space 21. The discharge pipe 23 has a flow path 231 formed inside, and is joined to the container 2 in such a way that the flow path 231 is connected to the upper part of the internal space 21.

[0015] The shaft 3 is formed in a rod shape. The shaft 3 is arranged in the internal space 21 along the rotation axis 31 that coincides with the central axis of the cylinder formed by the internal space 21, and is supported by the container 2 in a manner that can rotate around the rotation axis 31. The compression unit 5 is arranged in the lower part of the internal space 21. The compression unit 5 is a so-called rotor-type compression mechanism, which compresses the refrigerant supplied from the suction pipe 22 by the rotation of the shaft 3, and supplies the compressed refrigerant to the space above the compression unit 5 in the internal space 21.

[0016] The motor part 6 is arranged at the upper part of the compression part 5 in the internal space 21. The motor part 6 includes a rotor 61 and a stator 62. The rotor 61 is formed in a substantially cylindrical shape and is fixed to the shaft 3. Therefore, the rotor 61 is supported by the container 2 in a manner that it can rotate around the rotating shaft 31. A plurality of permanent magnets (not shown) are buried inside the rotor 61. The stator 62 is formed in a substantially cylindrical shape. The stator 62 is arranged around the rotor 61 and is fixed to the side surface on the inner diameter side of the container 2. The stator 62 includes a stator core 63, an upper insulating part 671, a lower insulating part 672, and a plurality of windings 68.

[0017] Figure 2: is an exploded perspective view of the stator 62 of the compressor 1 of the embodiment. The stator core 63 is formed in a roughly cylindrical shape and is formed by stacking a plurality of electromagnetic steel plates formed of soft magnetic materials, such as silicon steel plates. The cylindrical stator core 63 is arranged so that its central axis coincides with the rotating shaft 31 of the rotor 61. The stator core 63 includes a yoke 64 and a plurality of teeth 65. The yoke 64 is formed in a roughly cylindrical shape. The plurality of teeth 65 are respectively formed in a roughly cylindrical shape and are arranged on the inner side of the yoke 64 in a manner arranged at equal intervals on the inner peripheral surface of the yoke 64. The plurality of teeth 65 are each formed so that one end thereof is connected to the inner peripheral surface of the yoke 64, that is, one end thereof protrudes from the inner peripheral surface of the yoke 64 toward the center. A plurality of slots 66 are formed in the stator core 63. Each of the plurality of slots 66 is a space surrounded by the yoke 64 and two adjacent teeth among the plurality of teeth 65.

[0018] The stator 62 further includes a plurality of insulating films corresponding to the plurality of slots 66. One insulating film 69 among the plurality of insulating films is formed of an insulator such as polyethylene terephthalate (PET) and is formed in a bent sheet shape. The insulating film 69 includes a first tooth facing portion 691, a second tooth facing portion 692, and a yoke facing portion 693. The yoke facing portion 693 is formed between the first tooth facing portion 691 and the second tooth facing portion 692. The insulating film 69 is disposed inside each of the plurality of slots 66.

[0019] The upper insulating portion 671 is formed of an insulator such as polybutylene terephthalate (PBT), and includes an outer peripheral wall portion 673 and a plurality of winding portions 674. The outer peripheral wall portion 673 is formed in a substantially cylindrical shape. The plurality of winding portions 674 are each formed in a columnar shape, and are arranged on the inner side of the outer peripheral wall portion 673 in a manner of being arranged at equal intervals on the inner peripheral surface of the outer peripheral wall portion 673. The plurality of winding portions 674 are each formed so that one end thereof is connected to the inner peripheral surface of the outer peripheral wall portion 673, that is, one end thereof protrudes from the inner peripheral surface of the outer peripheral wall portion 673 toward the center. The upper insulating portion 671 is arranged on the upper side of the stator core 63 in a manner so that the plurality of winding portions 674 are along the upper end surfaces of the plurality of teeth portions 65.

[0020] Similar to the upper insulating portion 671, the lower insulating portion 672 is also formed of an insulator such as polybutylene terephthalate (PBT), and has an outer peripheral wall portion 673 and a plurality of winding portions 674. The outer peripheral wall portion 673 is formed in a substantially cylindrical shape. The plurality of winding portions 674 are each formed in a columnar shape, and are arranged on the inner side of the outer peripheral wall portion 673 in a manner of being arranged at equal intervals on the inner peripheral surface of the outer peripheral wall portion 673. The plurality of winding portions 674 are each formed so that one end thereof is connected to the inner peripheral surface of the outer peripheral wall portion 673, that is, one end thereof protrudes toward the center from the inner peripheral surface of the outer peripheral wall portion 673. The lower insulating portion 672 is arranged on the lower side of the stator core 63 in a manner such that the plurality of winding portions 674 are along the lower end surfaces of the plurality of teeth portions 65. In the embodiment, by forming the upper insulating portion 671 and the lower insulating portion 672 in the same shape, a pair of insulating portions 67 can be installed without distinction between the upper and lower parts.

[0021] Figure 3 : is another exploded perspective view of the stator 62 of the compressor 1 of the embodiment. The stator 62 also has a plurality of sheet members corresponding to the plurality of insulating films. The sheet member 70 is formed of a heat-resistant (flame-resistant) material such as polyethylene naphthalate (PEN), and is formed into a substantially rectangular thin plate. Polyethylene naphthalate (PEN) is superior in heat resistance to polyethylene terephthalate (PET) used to form the plurality of insulating films. The sheet member 70 is formed with four chamfered portions 73. The four chamfered portions 73 are formed at the four corners of the sheet member 70 so that the four corners corresponding to the four vertices of the rectangle of the sheet member 70 are not sharp, for example, so that the four corners of the sheet member 70 are rounded. Each of the plurality of sheet members 70 is also formed with a hole 71 extending through the thickness direction thereof. The hole 71 is formed into a substantially circular shape. The sheet member 70 is arranged together with the insulating film 69 in a slot 661 among the plurality of slots 66 corresponding to a welding hole 24 (described later) formed in the case 2 in the circumferential direction of the stator core 63 .

[0022] like Figure 4 As shown, one groove 661 among the plurality of grooves 66 is formed between adjacent first tooth portions 651 and second tooth portions 652 among the plurality of tooth portions 65 . Figure 4 1 is a top view of the groove 661 of the compressor 1 of the embodiment. The insulating film 69 corresponding to the groove 661 is arranged in the groove 661. At this time, the first tooth-facing portion 691 of the insulating film 69 is arranged along the groove-facing surface 653 of the first tooth portion 651 facing the groove 661. The second tooth-facing portion 692 of the insulating film 69 is arranged along the groove-facing surface 654 of the second tooth portion 652 facing the groove 661. The yoke-facing portion 693 of the insulating film 69 is arranged along the groove-facing surface 641 of the yoke portion 64 facing the groove 661.

[0023] A plurality of windings 68 are wound around the plurality of teeth 65, respectively. That is, a first winding 681 among the plurality of windings 68 is wound around the first tooth 651. A second winding 682 among the plurality of windings 68, which is different from the first winding 681, is wound around the second tooth 652. At this time, the first tooth facing portion 691 of the insulating film 69 is wound around the first tooth 651 among the plurality of teeth 65, and is surrounded by the first winding 681 together with the first tooth 651. The first tooth facing portion 691 prevents the first winding 681 from contacting the first tooth 651 along the slot facing surface 653 in the first tooth 651, thereby electrically insulating the stator core 63 from the first winding 681. The second tooth facing portion 692 of the insulating film 69 is wound around the second tooth 652 among the plurality of teeth 65, and is surrounded by the second winding 682 together with the second tooth 652. The second tooth facing portion 692 prevents the second winding 682 from contacting the second tooth portion 652 along the slot facing surface 654 in the second tooth portion 652 , thereby electrically insulating the stator core 63 from the second winding 682 .

[0024] The yoke facing portion 693 prevents the first winding 681 and the second winding 682 from contacting the yoke 64 by following the slot facing surface 641 of the yoke 64. The yoke facing portion 693 electrically insulates the stator core 63 from the winding 68 (the first winding 681 and the second winding 682) by preventing the first winding 681 and the second winding 682 from contacting the slot facing surface 641 of the yoke 64. The other insulating films among the plurality of insulating films, which are different from the insulating film 69, also electrically insulate the stator core 63 from the winding 68 in the same manner as the insulating film 69.

[0025] One of the plurality of windings 674 of the upper insulating portion 671 corresponding to the first tooth portion 651 is wound around the first winding 681 together with the first tooth portion 651, and is surrounded by the first winding 681 together with the first tooth portion 651. The winding prevents the first winding 681 from contacting the upper end surface of the first tooth portion 651, and electrically insulates the stator core 63 from the first winding 681.

[0026] One of the plurality of winding portions 674 of the lower insulating portion 672 corresponding to the first tooth portion 651 is wound around the first winding 681 together with the first tooth portion 651, and is surrounded by the first winding 681 together with the first tooth portion 651. The winding portion prevents the first winding 681 from contacting the lower end surface of the first tooth portion 651, and electrically insulates the stator core 63 from the first winding 681.

[0027] A plurality of welding holes 24 are also formed in the container 2 at positions where the stator core 63 is fixed in the direction of the rotating shaft 31. The plurality of welding holes 24 are respectively arranged near the grooves 661 among the plurality of grooves 66, and communicate the outside of the container 2 with the internal space 21. The grooves 661 are arranged at positions corresponding to the welding holes 24 in the circumferential direction of the stator core 63. That is, a vertical line P hanging down from each of the plurality of welding holes 24 to the rotating shaft 31 intersects with each corresponding groove 661.

[0028] The yoke facing portion 693 prevents the first winding 681 and the second winding 682 from contacting the slot facing surface 641 along the slot facing surface 641 of the yoke 64. The sheet 70 is arranged inside the slot 661 in a manner interposed between the yoke facing portion 693 of the insulating film 69 and the slot facing surface 641 of the yoke 64. That is, the sheet 70 is arranged to be interposed between the yoke facing portion 693 and the slot facing surface 641 of the yoke 64 and to intersect with the vertical line P. At this time, the hole 71 is formed at a position on the sheet 70 that intersects with the vertical line P. That is, the hole 71 formed on the sheet 70 is formed at a position corresponding to the welding portion W in the circumferential direction of the stator core 63 and in the direction of the rotating shaft 31 of the rotor 61. The hole 71 is formed so that the diameter of the hole 71 is larger than the diameter of the welding hole 24. Since the hole 71 is formed in the sheet member 70, an air layer 72 is formed between the slot facing surface 641 of the yoke 64 and the yoke facing portion 693 of the insulating film 69. In the compressor 1, the sheet members 70 are respectively provided in the slots 661 corresponding to the welding portions W (welding holes 24) in the circumferential direction of the stator core 63. That is, the compressor 1 includes a plurality of sheet members 70 corresponding to the number of welding portions W. In addition, the plurality of sheet members 70 are not limited to being arranged only in the slots 661 corresponding to the welding portions W, but may be respectively provided in all the plurality of slots 66.

[0029] The upper insulating portion 671 is further mounted on the stator core 63 in such a manner that the upper end surface of each of the plurality of sheet-like members 70 faces a portion of the upper insulating portion 671. The lower insulating portion 672 is further mounted on the stator core 63 in such a manner that the lower end surface of each of the plurality of sheet-like members 70 abuts against a portion of the lower insulating portion 672. In the stator 62, since the upper insulating portion 671 and the lower insulating portion 672 are mounted on the stator core 63 in this manner, the movement of the sheet-like members 70 and the insulating film 69 in the direction of the rotating shaft 31 is restricted. Therefore, in the stator 62, the plurality of sheet-like members 70 and the plurality of insulating films 69 can be appropriately fixed to the stator core 63 so that the plurality of sheet-like members 70 and the plurality of insulating films 69 do not fall off from the plurality of slots 66.

[0030] Method for manufacturing compressor 1

[0031] In the manufacturing method of the compressor 1, the lower insulating portion 672 is mounted on the stator core 63 in such a manner that the plurality of winding portions 674 are respectively along the lower end surfaces of the plurality of teeth portions 65. After the lower insulating portion 672 is mounted on the stator core 63, a plurality of (for example, nine) insulating films 69 are respectively inserted into the slots 661 of the stator core 63 and mounted on the stator core 63.

[0032] After the insulating film 69 is inserted into the slot 661, a plurality of (for example, three) sheet members 70 are inserted between the yoke 64 and the yoke facing portion 693 of the insulating film 69 at locations (for example, three locations) corresponding to the welding holes 24 of the container 2 in the circumferential direction of the stator core 63, and are installed on the stator core 63. At this time, since the sheet member 70 has chamfered portions 73 formed at its four corners, it can be easily inserted between the yoke 64 and the yoke facing portion 693, and the operation of installing the sheet member 70 on the stator core 63 can be facilitated. In the sheet member 70, by making the lower end surface of the sheet member 70 abut against a part of the lower insulating portion 672, it is possible to prevent the sheet member 70 from falling off from the lower side of the slot 661, and the operation of installing the sheet member 70 on the stator core 63 can be facilitated.

[0033] After the plurality of insulating films 69 and the plurality of sheet members 70 are respectively mounted on the corresponding parts of the stator core 63, the upper insulating portion 671 is mounted on the stator core 63 in such a manner that the plurality of winding portions 674 are along the plurality of teeth 65. After the upper insulating portion 671, the lower insulating portion 672, the plurality of insulating films 69, and the plurality of sheet members 70 are mounted on the stator core 63, the plurality of windings 68 are respectively wound around the plurality of teeth 65 and mounted on the stator core 63. By mounting the upper insulating portion 671, the lower insulating portion 672, the plurality of insulating films 69, the plurality of sheet members 70, and the plurality of windings 68, the stator core 63 forms the stator 62.

[0034] In the compression part 5, the rotor 61 is mounted by fixing the rotor 61 to the shaft 3 connected to the compression part 5. The motor part 6 is formed by inserting the rotor 61 mounted to the compression part 5 into the inner side of the stator 62. The motor part 6 and the compression part 5 are inserted into the container 2 and arranged at a predetermined position in the internal space 21 of the container 2.

[0035] After the motor part 6 and the compression part 5 are arranged at the predetermined positions of the internal space 21 of the container 2, the stator core 63 is fixed to the container 2 by arc welding the container 2 and the side surface 642 on the outer diameter side of the yoke 64 through the plurality of welding holes 24. At this time, a welded portion W welded to the container 2 is formed on the side surface 642 on the outer diameter side of the yoke 64 at a position corresponding to each of the plurality of welding holes 24 of the container 2. In the yoke 64, during arc welding, welding heat (heat generated during welding) is transferred from the welded portion W of the yoke 64 to the groove 661. However, in the motor part 6, by providing a sheet member 70 between the yoke 64 and the insulating film 69 at a position corresponding to the welded portion W in the circumferential direction of the stator core 63, the welding heat transferred from the yoke 64 to the insulating film 69 during welding can be reduced. Furthermore, since the hole 71 is provided in the sheet member 70, an air layer 72 is formed between the yoke 64 and the insulating film 69, which can further reduce the welding heat transferred from the welding portion W of the yoke 64 to the insulating film 69 during welding. Therefore, in the motor part 6, by reducing the welding heat transferred to the insulating film 69 during welding, it is possible to prevent the insulating film 69 from melting due to the welding heat during welding.

[0036] At the position where the welding hole 24 is formed in the container 2, the container 2 and the yoke 64 of the stator core 63 are arc-welded through the welding hole 24, thereby forming a welded portion W formed by cooling and solidifying the molten metal melted by heating the filler material (welding rod) and the welded member (base material). In the container 2, after the stator core 63 is fixed to the container 2, the internal space 21 is sealed.

[0037] Operation of compressor 1

[0038] The compressor 1 is provided in a refrigeration cycle device (not shown) for compressing the refrigerant and circulating the refrigerant in the refrigeration cycle device. In the motor part 6, a rotating magnetic field is generated in the space inside the stator 62 by appropriately applying a three-phase voltage to a plurality of windings 68. The rotor 61 rotates by the rotating magnetic field generated by the stator 62. The shaft 3 transmits the rotation of the rotor 61 to the compression part 5. The compression part 5 sucks in low-pressure gas refrigerant through the suction pipe 22 by the rotation of the rotor 61, generates high-pressure gas refrigerant by compressing the sucked low-pressure gas refrigerant, and supplies the high-pressure gas refrigerant to the space between the compression part 5 and the motor part 6 in the internal space 21.

[0039] The high-pressure gas refrigerant supplied to the space between the compression unit 5 and the motor unit 6 in the internal space 21 passes through the gap formed in the motor unit 6, and is thereby supplied to the space above the motor unit 6 in the internal space 21. The high-pressure gas refrigerant supplied to the space above the motor unit 6 in the internal space 21 is discharged through the discharge pipe 23 to a device located at the rear section of the compressor 1 in the refrigeration cycle device.

[0040] Effects of the compressor 1 of the embodiment

[0041] The compressor 1 of the embodiment includes a stator core 63, a rotor 61, a compression part 5, a container 2, a first winding 681, a second winding 682, an insulating film 69, and a sheet member 70. The stator core 63 has a yoke 64 and a plurality of teeth 65, and is formed in a cylindrical shape. The rotor 61 is arranged inside the stator core 63. The compression part 5 compresses the refrigerant by the rotation of the rotor 61 relative to the stator core 63. Inside the container 2, an internal space 21 for arranging the stator core 63 and the compression part 5 is formed. The first winding 681 is wound around the first teeth 651 in the stator core 63. The second winding 682 is wound around the second teeth 652 in the stator core 63. The insulating film 69 separates the first winding 681 from the stator core 63, and separates the second winding 682 from the stator core 63, and is arranged in the slot 66. A welding part W for fixing to the container 2 by welding is formed on the side surface 642 on the outer diameter side of the yoke 64. In the slots 661 corresponding to the welded portions W in the circumferential direction of the stator core 63 , the sheet members 70 are provided between the yoke 64 and the insulating film 69 .

[0042] In the compressor 1, since the sheet member 70 is disposed between the yoke 64 and the insulating film 69, it is possible to reduce welding heat transferred from the welded portion to the insulating film 69 without forming a cavity or a depression in the yoke 64. In the compressor 1, since no cavity or a depression is formed in the yoke 64, the magnetic resistance of the yoke 64 can be reduced, and the reduction in efficiency of the motor part 6 can be suppressed. In the compressor 1, since the welding heat transferred to the insulating film 69 is reduced, it is possible to prevent the insulating film 69 from melting due to the welding heat during welding, and the plurality of windings 68 can be appropriately electrically insulated from the stator core 63.

[0043] In addition, the sheet member 70 of the compressor 1 of the embodiment has a hole 71 formed at a position intersecting with a perpendicular line P extending from the welded portion W formed by welding the container 2 and the yoke 64 to the rotating shaft 31 of the rotor 61. That is, the sheet member 70 has a hole 71 formed at a position corresponding to the welded portion W in the circumferential direction of the stator core 63 and in the direction of the rotating shaft 31 of the rotor 61. At this time, in the compressor 1, since the hole 71 is formed in the sheet member 70, an air layer 72 is formed between the yoke 64 and the insulating film 69, and welding heat transferred from the welded portion W to the insulating film 69 during welding can be reduced.

[0044] In addition, although the hole 71 of the sheet member 70 of the compressor 1 of the embodiment described above is formed so that its diameter is larger than the diameter of the welding hole 24 or the diameter of the welding portion, it can also be formed so that its diameter is smaller than the diameter of the welding hole 24 or the diameter of the welding portion. In addition, although the hole 71 is formed in a circular shape, it can also be formed in other shapes different from a circular shape. As such a shape, for example, a polygon. In addition, although the hole 71 is formed on the sheet member 70 of the compressor 1 of the embodiment described above, the hole 71 may not be formed. In this case, in the compressor 1, since the sheet member 70 is provided, the welding heat transmitted to the insulating film 69 can also be reduced, so that the stator core 63 and the plurality of windings 68 can be properly electrically insulated.

[0045] In addition, the sheet member 70 of the compressor 1 of the embodiment is formed so that the circumferential length of the sheet member 70 is shorter than the circumferential length of the slot facing surface 641, so that a part of the sheet member 70 is not clamped by the insulating film 69 and the plurality of teeth 65. In this case, the size of the sheet member 70 can be reduced in the compressor 1, thereby reducing the manufacturing cost. In addition, the sheet member 70 is not easily deformed, and the positional displacement of the winding 68 can be prevented.

[0046] In addition, although the sheet member 70 of the compressor 1 of the above-described embodiment is formed small and not sandwiched by the insulating film 69 and the plurality of teeth 65, it may be formed large so as to be sandwiched by the insulating film 69 and the plurality of teeth 65. For example, the sheet member 70 may be formed in the same shape as the insulating film 69 so as to overlap with the insulating film 69. In the compressor 1, even when the sheet member 70 is sandwiched by the insulating film 69 and the plurality of teeth 65, since the sheet member 70 is disposed between the yoke 64 and the insulating film 69, the welding heat transferred to the insulating film 69 can be reduced.

[0047] In addition, the sheet member 70 of the compressor 1 is formed of a heat-resistant material (a property that is difficult to melt due to heat). At this time, the compressor 1 can prevent the sheet member 70 from melting due to welding heat, and can appropriately reduce the welding heat transmitted to the insulating film 69. In the embodiment, the sheet member 70 is formed of another material (for example, polyethylene naphthalate (PEN)) having a higher heat resistance than the material forming the insulating film 69 (for example, polyethylene terephthalate (PET)). As a result, it is possible to use a relatively cheap material as the insulating film 69, and use a highly heat-resistant material as the sheet member 70 to prevent the insulating film 69 from melting. In addition, the sheet member 70 can also be formed by replacing the above-mentioned polyethylene naphthalate (PEN) as a thermoplastic resin with polyimide as a thermosetting resin. In addition, as a material for forming the sheet member 70, a material having a higher glass transition point than the material forming the insulating film 69 can also be used. In addition, the material of the sheet member 70 is preferably a flame-resistant material that will not burn due to the heat during welding.

[0048] In addition, although the sheet member 70 of the compressor 1 of the embodiment described above is formed of a material having higher heat resistance than the material forming the insulating film 69, the sheet member 70 may be formed of the same material as the material forming the insulating film 69. In this case, the compressor 1 can also appropriately reduce the welding heat transferred to the insulating film 69. In this case, since the insulating film 69 and the sheet member 70 are formed of a common material, the manufacturing cost can be reduced.

[0049] In addition, the compressor 1 of the embodiment further includes a lower insulating portion 672 of an upper insulating portion 671. The upper insulating portion 671 includes a plurality of winding portions 674, and the plurality of winding portions 674 are respectively wound with a plurality of windings 68 together with a plurality of teeth 65. The lower insulating portion 672 includes a plurality of winding portions 674, and the plurality of winding portions 674 are respectively wound with a plurality of windings 68 together with a plurality of teeth 65. The upper end surface of the sheet member 70 faces the upper insulating portion 671. The lower end surface of the sheet member 70 abuts against the lower insulating portion 672. At this time, the movement of the sheet member 70 in the upward direction along the rotating shaft 31 of the rotor 61 is restricted by the upper insulating portion 671. In addition, the movement of the sheet member 70 in the downward direction along the rotating shaft 31 of the rotor 61 is restricted by the lower insulating portion 672. As a result, in the compressor 1, the sheet member 70 can be appropriately fixed to the stator core 63 so that the sheet member 70 does not deviate from a predetermined position.

[0050] In addition, although the sheet member 70 of the compressor 1 in the above-described embodiment is fixed to the stator core 63 by making the end faces of the sheet member 70 abut against the upper insulating portion 671 and the lower insulating portion 672, it may be fixed to the stator core 63 in other ways. For example, the sheet member 70 may be fixed to the stator core 63 by being sandwiched between the insulating film 69 and the yoke 64. In this case, in the compressor 1, the sheet member 70 can be appropriately fixed to the stator core 63, the welding heat transferred to the insulating film 69 can be reduced, and the stator core 63 and the plurality of windings 68 can be appropriately electrically insulated.

[0051] The above embodiments are described, but the above contents do not constitute a limitation of the embodiments. In addition, the above constituent elements include constituent elements that are easily thought of by those skilled in the art, are substantially the same, and are generally referred to as equivalent. In addition, the above constituent elements can be appropriately combined. Moreover, within the scope of the gist of the embodiments, the constituent elements can be omitted, replaced, and changed in at least one of various ways.

[0052] Explanation of symbols

[0053] 1: Compressor

[0054] 2: Container

[0055] 21: Inner Space

[0056] 24: Welding hole

[0057] 31: Rotation axis

[0058] 5: Compression

[0059] 6: Motor

[0060] 61: Rotor

[0061] 62: Stator

[0062] 63: stator core

[0063] 64: Yoke

[0064] 65: Multiple teeth

[0065] 651: First tooth

[0066] 652: Second tooth

[0067] 66: Slot

[0068] 671: Upper insulation

[0069] 672: Lower insulation

[0070] 68: Multiple windings

[0071] 681: First winding

[0072] 682: Second winding

[0073] 69: Insulation film

[0074] 70: Sheet

[0075] 71: Hole

[0076] 72: Air layer

[0077] P: Vertical line

[0078] W: welding part

Claims

1. A compressor, comprising: The stator core is formed into a cylindrical shape and has a yoke portion, a tooth portion and a slot; A rotor, disposed inside the stator core; a compression unit that compresses refrigerant by the rotation of the rotor relative to the stator core; a container, wherein a space for arranging the stator core and the compression part is formed inside; A winding wound around the teeth of the stator core; and an insulating film, separating the winding from the stator core, and disposed in the slot, A welding portion fixed to the container by welding is formed on the side surface of the outer diameter side of the yoke. A sheet-like member is provided in the slot corresponding to the welding portion in the circumferential direction of the stator core, and the sheet-like member is interposed between the yoke and the insulating film. The sheet member has holes formed at positions corresponding to the welding portions in the circumferential direction of the stator core and in the rotation axis direction of the rotor.

2. The compressor according to claim 1, wherein: The sheet member is formed of a material having higher heat resistance than a material forming the insulating film.

3. The compressor according to claim 1, further comprising: an insulating portion having a winding body portion, the winding body portion and the tooth portion being wound by the winding, Here, at least one end surface of the sheet member in the direction of the rotation axis of the rotor abuts against the insulating portion.

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