WO2010103871A1

WO2010103871A1 - Stator, motor and compressor

Info

Publication number: WO2010103871A1
Application number: PCT/JP2010/051016
Authority: WO
Inventors: 聡塚本; 雅敏平野; 英己丹治
Original assignee: ダイキン工業株式会社
Priority date: 2009-03-12
Filing date: 2010-01-27
Publication date: 2010-09-16
Also published as: JP2010213527A

Abstract

Disclosed is a stator equipped with a core (35) having a plurality of teeth (57-65) arranged annularly, an insulator (36) arranged at the end of the core (35) and having a plurality of protrusions (38-46) around which coils (84-92) are wound together with the teeth (57-65) and an annular wall (47) extending in the direction receding from the core (35) on the radial outside of the plurality of protrusions (38-46), and binding threads (106a-106h) which bind and hold a neutral line (102) led out from the coils (84-92) wound around the teeth (57-65) and protrusions (38-46), crossovers (103a-103c) on the side of respective phases and lead wires (104a-104c) on the side of respective phases to a plurality of hooks (107-114) formed on the outer wall (47). A motor and a compressor to which the stator is applied are also provided.

Description

Stator, motor and compressor

The present invention relates to a motor stator mounted on industrial equipment, office equipment, home appliances, and the like, and a motor and a compressor to which the stator is applied.

Conventionally, a motor in which a rotor rotates inside a stator is known as a motor mounted on industrial equipment and the like. This stator is mainly formed around a core on which teeth are formed and around the teeth. It is comprised with the arrange | positioned coil. As a method of attaching a coil to such a core, a concentrated winding method in which a coil is directly wound around a tooth formed on the core, and a distributed winding method in which a separately wound coil is fitted into the core are known. .

Of these methods, a motor employing a concentrated winding method generally requires an operation of sandwiching an insulator between a tooth provided on a core and a coil wound around the tooth. Therefore, in order to simplify such work, insulators for insulating the coil from the core are arranged at both ends in the axial direction of the core formed in a cylindrical shape. As such an insulator, there exists an insulator of patent document 1, for example. FIG. 9 is a plan view of the insulator 5 described in Patent Document 1. FIG. The insulator 5 draws the connecting wire 31 of the winding 4 along the outer peripheral wall portion 8, takes out from the inner side to the outer side of the outer peripheral wall portion 8 at the take-out guide portion 13, and winds the connecting wire 31 over the plurality of connecting wires 31. 20 and a configuration for connecting to a connector.

JP 2005-224033

In recent years, it has been desired to develop a motor with higher output, and in order to improve the output of the motor, it is necessary to increase the wire diameter of the coil. Therefore, consider a case where the wire diameter of the coil used in the motor provided with the insulator 5 is increased. Generally, when the wire diameter of the coil is increased, the rigidity of the coil is increased, so that the rigidity of the connecting wire constituted by a plurality of coils is also increased. When the rigidity is increased, the connecting wire cannot be used as the lead wire as it is due to workability problems. Therefore, the lead wire of another part, the connecting member that electrically connects the lead wire and the connecting wire, and the insulating member for insulating the connecting member Is required. Since these parts have a large volume and the rigidity of the connecting wire is large, these parts including the connecting wire may protrude outward in the radial direction of the motor.

For example, if this motor is applied to a compressor of a type in which refrigerant gas passes through the outside of the motor in the radial direction, the connecting wire may protrude outward in the radial direction of the motor, which may hinder the circulation of the refrigerant gas. Therefore, it is necessary to prevent the jumper wires from protruding outward in the radial direction of the motor.

Accordingly, the present invention has been made to solve the above-described problems, and provides a stator capable of securely fixing a jumper wire to an insulator, and a motor and a compressor to which the stator is applied. The purpose is to do.

A stator according to a first aspect of the present invention includes a core having a plurality of teeth arranged in an annular shape, a plurality of protrusions and a plurality of protrusions that are arranged at the ends of the core and around which the electric wire is wound together with the teeth. An insulator having an annular wall portion extending in a direction away from the core on the radially outer side of the wire, and a holding member for holding the holding portion drawn out from the electric wire wound around the tooth portion and the protruding portion on the wall portion. I have.

In this stator, by using an electric wire having a wire diameter larger than the conventional wire diameter, even if the rigidity of the connecting wire composed of a plurality of electric wires is increased, a holding member that is a separate member from the insulator is used. Since the crossover is held on the wall portion of the insulator, the crossover can be securely fixed to the insulator.

The stator according to the second invention is the stator according to the first invention, wherein the holding member holds the holding portion on the wall portion of the insulator so that the holding portion is arranged inside the wall portion of the insulator. Yes.

In this stator, when the refrigerant gas for cooling the motor passes vertically outside the motor in the radial direction, the crossover is held inside the insulator wall, so the crossover is on the outside in the radial direction of the motor. It is possible to prevent the crossover from inhibiting the flow of the refrigerant gas without protruding.

The stator according to a third aspect of the present invention is the stator according to the first or second aspect of the present invention, wherein the insulator wall includes an annular wall body disposed on the core side and a passage through which the holding member passes. And a holding portion extending from the wall main body in a direction away from the core so as to be formed. And the holding | maintenance part has the 1st extension part extended from the wall part main body in the direction away from a core, and the 2nd extension part extended along the wall part main body from the 1st extension part. ing.

In this stator, the crossover can be easily held along the wall body of the insulator.

The stator according to a fourth aspect of the present invention is the stator according to the third aspect of the present invention, wherein the passage portion is formed at a position not facing the electric wire wound around the tooth portion and the protruding portion.

In this stator, when the holding member is held in the wall portion of the insulator by the holding member, when the holding member is disposed in the passage portion, the holding member and the electric wire wound around the tooth portion and the protruding portion are Since it does not contact, a crossover can be easily hold | maintained on the wall part of an insulator.

The stator according to a fifth aspect of the invention is the stator according to the fourth aspect of the invention, wherein the end of the second extending portion on the wall portion main body side is inclined so as to approach the wall portion main body as the distance from the first extending portion increases. is doing.

In this stator, since the holding member for holding the crossover does not shift along the wall main body of the insulator, the crossover can be securely held.

A stator according to a sixth aspect of the invention is the stator according to the fourth or fifth aspect of the invention, wherein the second extending portion has a protruding portion that extends in a direction approaching the wall portion main body.

In this stator, since the projecting portion restricts the movement of the holding member, the holding member can be prevented from falling off from the second extending portion.

The stator according to a seventh aspect of the present invention is the stator according to any one of the third to sixth aspects, wherein the passing portion formed by the holding portion is formed at a position corresponding to between the tooth portions.

In this stator, since the electric wire wound around the tooth portion and the protruding portion is not opposed to the position where the connecting wire is held by the holding member, the connecting wire can be easily held on the wall portion of the insulator by the holding member. Can do.

The stator according to the eighth invention is the stator according to any one of the first to seventh inventions, wherein the holding member is a binding thread that binds the holding portion to the wall portion of the insulator. And this varnish is coated with varnish in a state where the holding portion is tied to the wall portion of the insulator.

In this stator, by using a binding thread as a holding member, it is possible to hold the jumper wire on the insulator wall by a simple method of binding to the insulator wall with the binding thread. And, in a state where the connecting wire is tied with the binding yarn, by applying the varnish to the binding yarn, the binding yarn contracts as the varnish dries, and the connecting wire can be held more firmly on the insulator wall. it can.

The stator according to a ninth aspect of the invention is the stator according to any one of the first to eighth aspects of the invention, wherein the holding portion covers a portion drawn from the tooth portion and the electric wire wound around the protruding portion of the insulator. It is an insulating member.

In this stator, the connecting wire drawn from the electric wire is covered with an insulating member such as an insulating cap, and the covered portion is held on the wall portion of the insulator, so that the holding portion including the connecting wire is more reliably fixed. .

A motor according to a tenth invention includes the stator according to any one of the first to ninth inventions.

In this motor, a stator having an electric wire having a larger wire diameter than the conventional wire diameter can be employed.

A compressor according to an eleventh aspect includes a motor according to the tenth aspect.

In this compressor, a motor having an electric wire with a larger wire diameter than the conventional wire diameter can be employed.

As described in the above description, according to the present invention, the following effects can be obtained.

In the first invention, even if the rigidity of the jumper wire is increased by using an electric wire having a larger wire diameter than the conventional wire diameter, a wall of the insulator can be obtained by using a holding member that is a separate member from the insulator. A crossover can be held in the section.

In the second aspect of the invention, when the refrigerant gas for cooling the motor passes vertically outside the motor in the radial direction, the connecting wire is held inside the insulator wall, so the connecting wire allows the refrigerant gas to flow. Inhibition can be prevented.

In the third invention, the crossover can be held along the wall main body of the insulator.

In the fourth aspect of the invention, since the holding member and the electric wire wound around the tooth portion and the protruding portion do not come into contact with each other when the connecting wire is held on the wall portion of the insulator by the holding member, the connecting wire is easily insulated. Can be held on the wall.

In the fifth invention, it is possible to prevent the holding member from falling off from the second extending portion.

In the sixth invention, it is possible to prevent the holding member from falling off from the second extending portion by the protruding portion.

In the seventh invention, since the electric wire wound around the tooth portion and the protruding portion is not opposed to the position where the connecting wire is held by the holding member, the connecting wire is easily held on the wall portion of the insulator by the holding member. be able to.

In the eighth invention, by using the binding thread as the holding member, the connecting wire can be held by a simple method of binding to the wall portion of the insulator with the binding thread. And, in a state where the connecting wire is tied with the binding yarn, by applying the varnish to the binding yarn, the binding yarn contracts as the varnish dries, and the connecting wire can be held more firmly on the insulator wall. it can.

In the ninth invention, the connecting wire drawn from the electric wire is covered with an insulating member such as an insulating cap, and the covered portion is held on the wall portion of the insulator, so that the holding portion including the connecting wire is more securely fixed. Become.

In the tenth invention, a stator having an electric wire with a larger wire diameter than the conventional wire diameter can be employed.

In the eleventh invention, a motor having an electric wire with a larger wire diameter than the conventional wire diameter can be employed.

It is sectional drawing which shows the scroll compressor which concerns on 1st Embodiment of this invention. It is a perspective view of an insulator. It is a top view of an insulator. It is a perspective view of a stator. It is a top view of a stator. It is a side view of a stator. It is a schematic diagram which shows the connection state of a coil. It is an expanded view of an insulator. FIG. 4 is a development view of an insulator, (A) is a development view of the hook portion 110, and (B) is a development view of the hook portion 111. It is a top view of the conventional stator.

Hereinafter, a stator, a motor, and a compressor according to an embodiment of the present invention will be described with reference to the drawings.

<Scroll compressor>
FIG. 1 is a cross-sectional view showing a scroll compressor 1 (compressor) according to an embodiment of the present invention. The scroll compressor 1 constitutes a refrigerant circuit together with an evaporator, a condenser, an expansion valve, and the like, and plays a role of compressing a gas refrigerant in the refrigerant circuit. The scroll compressor 1 has a cylindrical sealed dome type casing 10. , A scroll compression mechanism 11, a motor 12, a suction pipe 13, a discharge pipe 14, and the like. Hereinafter, details of these main components will be described.

<Casing>
The casing 10 has a substantially cylindrical body casing part 15, a bowl-shaped upper wall part 16 welded in an airtight manner to the upper end part of the body part casing part 15, and an airtight state at the lower end part of the body part casing part 15. And a bowl-shaped bottom wall portion 17 to be welded. The casing 10 accommodates a scroll compression mechanism 11 that compresses the gas refrigerant and a motor 12 that is disposed below the scroll compression mechanism 11. Further, the scroll compression mechanism 11 and the motor 12 are connected by a drive shaft 18 that is disposed so as to extend in the vertical direction in the casing 10.

<Scroll compression mechanism>
As shown in FIG. 1, the scroll compression mechanism 11 includes a housing 19, a fixed scroll member 20 disposed in close contact with the housing 19, and a movable scroll member 21 that meshes with the fixed scroll member 20. Has been.

<Housing>
The housing 19 is press-fitted and fixed to the body casing portion 15 over the entire outer circumferential surface thereof in the circumferential direction. That is, the body casing portion 15 and the housing 19 are in close contact with each other over the entire circumference. Therefore, the inside of the casing 10 is partitioned into a high-pressure space 22 below the housing 19 and a low-pressure space 23 above the housing 19. The housing 19 is fixed to the fixed scroll member 20 with a bolt member so that the upper end surface thereof is in close contact with the lower end surface of the fixed scroll member 20. The housing 19 is formed with a housing recess 24 that is recessed in the center of the upper surface, and a bearing portion 25 that extends downward from the center of the lower surface.

<Fixed scroll member>
As shown in FIG. 1, the fixed scroll member 20 includes an end plate 26 and a spiral wrap 27 extending downward from the mirror surface of the end plate 26. A discharge hole 28 communicating with the compression chamber 32 is formed in the central portion of the end plate 26.

<Moveable scroll member>
As shown in FIG. 1, like the fixed scroll member 20, the movable scroll member 21 includes a mirror plate 29, a spiral wrap 30 extending upward from the mirror surface of the mirror plate 29, and a boss extending downward from the lower surface of the mirror plate 29. Part 31. Further, the upper end of the drive shaft 18 is fitted into the boss portion 31. The movable scroll member 21 incorporated in the scroll compression mechanism 11 revolves inside the housing 19 without rotating by the rotation of the drive shaft 18.

As shown in FIG. 1, the wrap 30 of the movable scroll member 21 meshes with the wrap 27 of the fixed scroll member 20, and a compression chamber 32 is formed between these wraps. The compression chamber 32 is displaced toward the center as the movable scroll member 21 revolves, and the volume of the compression chamber 32 contracts. And the gas refrigerant in the compression chamber 32 is compressed by this contraction.

<Intake pipe and discharge pipe>
The suction pipe 13 is for guiding the refrigerant in the refrigerant circuit to the scroll compression mechanism 11 and is fitted into the upper wall portion 16 of the casing 10 in an airtight manner. The suction pipe 13 penetrates the low pressure space 23 in the vertical direction, and an inner end portion is fitted into the fixed scroll member 20. On the other hand, the discharge pipe 14 discharges the refrigerant in the casing 10 to the outside of the casing 10, and is fitted in the body casing portion 15 of the casing 10 in an airtight manner.

<Motor>
The motor 12 includes a rotor 33 (rotor) coupled to the movable scroll member 21 via the drive shaft 18 and a stator 34 (stator) disposed on the radially outer side of the rotor 33 via an air gap. Have. The stator 34 includes a core 35,

insulators

36 and 37 disposed at the upper and lower ends of the core 35, and coils 84 to 92 (see FIGS. 4 and 5), which will be described later. Yes. The

insulators

36 and 37 are formed in substantially the same shape. Therefore, in order to simplify the description, the configuration of the insulator 36 will be described in detail below.

<Insulator>
FIG. 2 is a perspective view of the insulator 36. FIG. 3 is a top view of the insulator 36. As shown in these drawings, the insulator 36 protrudes radially inward, and includes nine protrusions 38 to 46 arranged in an annular shape, and a core 35 (see FIG. 1) on the radially outer side of each protrusion 38 to 46. An annular outer wall part 47 (wall part) extending in a direction away from the core 35 (see FIG. 1) at the tip ends of the projecting parts 38 to 46, and inner wall parts 48 to 56 extending in a direction away from the core 35 (see FIG. 1). Have. As shown in FIG. 2, a plurality of hook portions 107 to 114 having substantially the same shape are formed on the outer wall portion 47.

As shown in FIG. 3, the

protrusions

38 and 39, the

protrusions

39 and 40, the

protrusions

40 and 41, the

protrusions

41 and 42, the

protrusions

42 and 43, the

protrusions

43 and 44, and the protrusions Nine slots 93 to 101 are sequentially formed in this order between the

portions

44 and 45, between the projecting

portions

45 and 46, and between the projecting

portions

38 and 46. These slots 93 to 101 are originally provided between the teeth indicated by broken lines in FIG. 5, that is, between the

teeth

57 and 58, between the

teeth

58 and 59, between the

teeth

59 and 60, between the

teeth

60 and 61, and between the teeth 61. 62, between the

teeth

62 and 63, between the

teeth

63 and 64, between the

teeth

64 and 65, and between the

teeth

57 and 65, in FIG. Show.

<Stator>
FIG. 4 is a perspective view of the stator 34. FIG. 5 is a top view of the stator 34. FIG. 6 is a side view of the stator 34 viewed from the directions of arrows A and B in FIG. As shown in these drawings, the stator 34 has nine teeth 57 to 65 (tooth portions) that protrude inward in the radial direction of the core 35 and are arranged in an annular shape. Further, on the outer peripheral surface of the core 35, nine concave portions 66 to 74 and nine convex portions 75 to 83 cut along the axial direction of the core 35 are alternately formed along the circumferential direction. .

These recesses 66 to 74 are portions that do not come into contact with the inner peripheral surface of the casing 10 when the core 35 is assembled into the casing 10 by shrink fitting or the like, and as shown in FIG. Are formed at positions corresponding to the teeth 57 to 65, respectively.

On the other hand, the convex portions 75 to 83 are provided between the teeth. As shown in FIG. 5, these convex portions 75 to 83 are formed between the

teeth

57 and 58, between the

teeth

58 and 59, between the

teeth

59 and 60, between the

teeth

60 and 61, between the

teeth

61 and 62, and between the teeth 62, respectively. 63, between

teeth

63 and 64, between

teeth

64 and 65, and between

teeth

57 and 65.

Further, the teeth 57 to 65 are formed in substantially the same shape as indicated by broken lines in FIG. 5, and the teeth 57 to 65 are formed in the protrusions 38 to 46 (see FIG. 3) of the insulator 36, respectively. At the same time, coils 84 to 92 (electric wires) are wound. Further, as shown in FIG. 5, from the wound coils 84 to 92, three lead wires for receiving power supply from the outside are drawn out, and the three phases of U phase, V phase and W phase are drawn out. To be controlled.

FIG. 7 is a diagram schematically showing the connection relationship of the coils 84 to 92. As shown in FIG. When coils of the same phase are connected in parallel, one of the coils is directly connected to the power supply P side and the other is connected to the neutral point N side. That is, one end of the U-phase side coils 84, 87, 90, one end of the V-phase side coils 85, 88, 91, and one end of the W-phase side coils 86, 89, 92 are connected to the power supply P side. ing. On the other hand, the other ends of the U-phase side coils 84, 87, 90, the other ends of the V-phase side coils 85, 88, 91, and the other ends of the W-phase side coils 86, 89, 92 are neutral points. Connected to the N side. In this description, the expressions “power source P side” and “neutral point N side” are used depending on whether the power source side is closer to the neutral point side.

The power supply P-side wires of the U-phase side coils 84, 87, 90 are gathered together and the power-supply side P-side wires of the U-phase side crossover wire 103a and V-phase side coils 85, 88, 91 are summarized. The W-phase connecting wire 103c is a collection of the V-phase connecting wire 103b and the electric wires on the power supply P side of the W-

phase coils

86, 89, 92.

In order to connect each phase-side connecting wire to the power source P, it is necessary to route each phase-side connecting wire 103a to 103c along the outer wall portion 47 of the insulator 36. The phase-side connecting wires 103a to 103c are configured. Since the wire diameter of the coil is larger than the conventional wire diameter, the rigidity is increased, and the phase-side connecting wires 103a to 103c cannot be used as lead wires as they are. Therefore, a lead wire as a separate member, a connecting member that electrically connects the lead wire and the crossover wire, and an insulating member for insulating the connecting member are used. The lead wire connected to the U-phase side connecting wire 103a is the U-phase side lead wire 104a, the lead wire connecting to the V-phase side connecting wire 103b is the V-phase side lead wire 104b, and the lead connecting to the W-phase side lead wire 103c. The wire is a W-phase lead wire 104c. The insulating member that covers the connecting portion between the U-phase side connecting wire 103a and the U-phase side lead wire 104a is defined as an insulating member 105a, and the insulating member that covers the connecting portion between the V-phase side connecting wire 103b and the V-phase side lead wire 104b. Is an insulating member 105b, and an insulating member that covers the connection portion between the W-phase connecting wire 103c and the W-phase lead wire 104c is the insulating member 105c. These insulating members 105a to 105c are made of an insulating material such as polyethylene terephthalate.

As shown in FIG. 5, the U-phase side lead wire 104 a is drawn clockwise from the teeth 93 in the order of the

teeth

58, 59, 60, 61, 62 and reaches the substantially central portion of the teeth 63. The insulating member 105 a covers from the slot 93 where the U-phase side lead wire 104 a starts to be routed to the substantially central portion of the tooth 59. The V-phase side lead wire 104b is routed clockwise from the slot 94 in the order of the

teeth

59, 60, 61, 62, 63, and reaches the vicinity of the slot 99 between the

teeth

63, 64. The insulating member 105b covers from the slot 94 where the V-phase side lead wire 104b starts to be routed to the

teeth

59 and 60. The W-phase lead wire 104c is drawn clockwise from the slot 95 between the

teeth

50 and 51 in the order of the

teeth

60, 61, 62, and 63 to the slot 99. The insulating member 105 c covers from the slot 95 where the W-phase side lead wire 104 c starts to be routed to a substantially central portion of the

teeth

60 and 61.

Further, as shown in FIG. 5, the phase side lead wires 104a to 104c are held on the outer wall portion 47 by the binding yarns 106a to 106e at the hook portions 107 to 111 provided on the outer wall portion 47 of the insulator 36. . The hook portion 107 is at a position corresponding to the slot 94 of the outer wall portion 47, the hook portion 108 is at a position corresponding to the slot 95 of the outer wall portion 47, and the hook portion 109 is at a position corresponding to the slot 96 of the outer wall portion 47. 110 is provided at a position corresponding to the slot 97 of the outer wall portion 47, and the hook portion 111 is provided at a position corresponding to the substantially central portion of the teeth 62 of the outer wall portion 47. The binding thread 106 a binds the U-phase side lead wire 104 a covered with the insulating member 105 a to the hook portion 107 so as to be disposed inside the ring formed by the wall portion main body 47. The binding thread 106b binds the U-phase side crossover wire 103a and the V-phase side lead wire 104b covered with the insulating member 105b to the hook portion 108 so as to be disposed inside the ring. The tying yarn 106c has a U-phase side lead wire 104a (not shown), a V-phase side crossover wire 104b, and a W-phase side lead wire 104c covered with an insulating member 105c arranged on the inside of the ring. As shown in FIG. The binding

yarns

106d and 106e bind the respective phase side lead wires 104a to 104c to the

hook portions

110 and 111 so as to be arranged on the inner side of the ring.

On the other hand, the wires on the neutral point N side of the U-phase side coils 84, 87, and 90 are collected on the neutral point N side of the U-phase side neutral wire 102 a and the V-phase side coils 85, 88, and 91. A collection of the electric wires is a V-phase side neutral wire 102b, and a collection of electric wires on the neutral point N side of the W-phase side coils 86, 89, 92 is a W-phase side neutral wire 102c.

Each of these phase side neutral wires 102a to 102c (hereinafter referred to as “neutral wire 102”) is covered with an insulating member 105d as shown in FIGS. 4 and 5, and the teeth 57 to 65, 64 are covered. The neutral wire 102 is also connected to the outer wall by the binding threads 106f to 106h at the hook portions 112 to 114 provided on the outer wall portion 47 of the insulator 36, similarly to the lead wire. The hook portion 112 is located at a position corresponding to the slot 99 of the outer wall portion 47, the hook portion 113 is located at a position corresponding to the slot 100 of the outer wall portion 47, and the hook portion 114 is located at the slot 101 of the outer wall portion 47. The tying

yarns

106f, 106g, 106h are respectively provided at positions corresponding to the neutral wire 10 covered with the insulating member 105d. So it is located inside the ring formed by the outer wall portion 47, and tied each neutral wire 102 to hook

portion

112, 113 and 114.

6 is a side view of the stator 34, FIG. 6 (A) is a side view of the stator 34 viewed from the direction of the arrow A shown in FIG. 5, and FIG. 6 (B) is a view of FIG. It is a side view of the stator 34 seen from the direction of arrow B shown in FIG. As shown in FIG. 6A, the binding thread 106a binds the U-phase side lead wire 104a covered with the insulating member 105a to the hook portion 107, and the binding thread 106h is covered with the insulating member 105d. The sex wire 102 is bound to the hook portion 114.

Projections

471, 475 and 476 are formed on the outer peripheral surface of the outer wall 47. The

protrusions

471, 475, and 476 prevent the electric wires that circulate along the outer peripheral surface of the outer wall portion 47 from coming off the outer wall portion 47. In particular, when the refrigerant gas passes through the outer peripheral surface of the motor 12 from the lower side to the upper side, the electric wire is disconnected from the outer wall portion 47 by the flow of the refrigerant gas and the flow of the refrigerant gas is prevented from being hindered. On the other hand, as shown in FIG. 6B, the binding threads 106c to 106e also bind the lead wires 104a to 104c and the like to the hook portions 109 to 111, respectively. The

protrusions

472 and 473 also prevent the electric wire that runs along the outer peripheral surface of the outer wall 47 from coming off the outer wall 47.

Next, specific shapes of the hook portions 107 to 114 will be described. FIG. 8 is an exploded view of the annular insulator 36 shown in FIG. 2 cut in the vertical direction at the center of the hook portion 113 and expanded from the radially outer side, and an enlarged view of the hook portion 110 as a part thereof. FIG. The shapes of the coils 84 to 92 wound around the protrusions of the teeth and the insulator are indicated by dotted lines. In the following, the shape of the hook part will be described by taking the hook part 110 as an example. Some other hook parts have a shape strictly different from that of the hook part 110, but they have a mirror image relation with the hook part 110 in the circumferential direction of the ring formed by the insulator 36. The shape itself is substantially the same as the hook part 110.

The outer wall portion 47 includes an annular wall portion main body 47a disposed on the core 35 side when the insulator 36 is disposed on the stator 34. The hook part 110 extends from the wall part main body 47a in a direction away from the core 35 (vertically upward direction). The hook portion 110 is disposed between the coil 88 wound around the tooth 61 and the protruding portion 42 and the coil 89 wound around the tooth 62 and the protruding portion 43, and is disposed so as not to face the coil. Yes.

As shown in the enlarged view of FIG. 8, the hook portion 110 includes a first extension portion 110b extending from the wall portion main body 47a in a direction away from the core 35, and the first extension portion 110b to the wall portion main body 47a. And a second extending portion 110c extending along. The first extending portion 110b and the second extending portion 110c together with the wall portion main body 47a form a passage hole 110a through which the binding thread 106d passes. And the edge part 110d by the side of the wall part main body 47a of the 2nd extension part 110c inclines so that it may approach the wall part main body 47a as it leaves | separates from the 1st extension part 110b.

Further, the end portion of the second extending portion 110c opposite to the first extending portion 110b has a protruding portion 110e extending in a direction approaching the wall main body 47a (vertically downward).

Next, the relationship between the lengths of the portions of the hook portions 107 to 114 will be described with reference to a development view and an enlarged view of FIG.

FIG. 9A is a diagram showing the length of each part of the hook part 110 shown in the enlarged view of FIG. First, the length A obtained by subtracting the width of the protruding portion 110e from the length along the wall main body 47a of the second extending portion 110c has a length sufficient to allow the binding thread 106d to be disposed. Yes. Accordingly, the binding thread 106d can bind the phase side lead wires 104a to 104c to the second extending portion 110c and hold the phase side lead wires 104a to 104c to the hook portion 110. Further, the length between the lower end of the protrusion 110e and the lower end 110f of the passage hole 110a is B, and the height of the protrusion 110e (the length between the lower end of the protrusion 110e and the connecting portion of the second extension 110c). C), the length between the end of the second extension 110c opposite to the first extension 110b and the end of the wall facing the coil 88 on the hook 110 side is D, Assuming that the diameter of the binding thread 106d is r, the relationships among A, B, C, D, and r are A ≧ r, B ≧ r, C ≧ 0.5r, and D ≧ r. Furthermore, the height of the wall main body 47a (distance from the lower end 47b of the wall main body 47a to the lower end 110f of the passage hole 110a) is E, and the height of the coil 88 (distance from the lower end 47b to the vertex 88a of the coil 88). If F is F, the relationship between E and F is E <F. That is, the lower end 119 f of the passage hole 110 is formed at a position lower than the apex 88 a of the coil 88.

FIG. 9B is an enlarged view of the hook portion 111. The hook portion 111 has a mirror image relationship with the hook portion 110 in the circumferential direction of the ring formed by the wall portion main body 47 a, and the shape thereof is substantially the same as the hook portion 110. However, the hook portion 111 is disposed at a position facing the coil 89 as shown in FIG. Then, the height (the distance from the lower end 47b of the wall portion main body 47a to the lower end 111f of the passage portion 111a) G and the height of the coil 89 (from the lower end 47b to the apex 89a of the coil 89) in the hook portion 111. The distance (H) has a relationship of G> H. That is, the lower end 111 f of the passage hole 111 a is formed at a position higher than the apex 89 a of the coil 89.

Further, varnish is applied to the binding threads 106a to 106h for binding the lead wire and the neutral wire to each hook portion in a state where the lead wire and the neutral wire are tied to each hook portion.

[Features of Stator, Motor, and Compressor According to this Embodiment]
The stator, motor, and compressor according to this embodiment have the following characteristics.

In the stator 34 of the present embodiment, the neutral wire 102 pulled out from the coils 84 to 92 and the phase side lead wires 104a to 104c connected to the phase side crossover wires 103a to 103c are provided on the outer wall portion 47 of the insulator 36. The hook portions 107 to 114 formed are bound with binding threads 106a to 106h. For this reason, even if the wire diameters of the coils 84 to 92 are larger than the conventional wire diameter, and the rigidity of the neutral wire 102, the phase-side connecting wires 103a to 103c, and the phase-side lead wires 104a to 104c is increased. These neutral wires 102, the respective phase-side connecting wires 103a to 103c, and the lead wires 104a to 104c can be fixed along the ring formed by the outer wall portion 47.

Further, in the stator 34 of the present embodiment, the neutral wire 102 and the respective phase side lead wires 104a to 104c are held by being tied to the inner side of the ring formed by the outer wall portion 47 of the insulator 36 with the binding yarns 106a to 106h. ing. For this reason, when the refrigerant gas for cooling the motor 12 passes up and down the radial outside of the motor 12, the neutral wire 102 and the phase-side lead wires 104a to 104c are prevented from obstructing the flow of the refrigerant gas. can do.

Further, in the stator 34 of the present embodiment, the hook portion 110 corresponds between the coil 88 wound around the tooth 61 and the protruding portion 42 of the insulator 36 and the coil 89 wound around the tooth 62 and the protruding portion 43. It is arranged at the position to do. For this reason, when the phase side lead wires 104a to 104c are tied to the hook portion 110 by the binding yarn 106d, the binding yarn 106d and the

coils

88 and 89 do not come into contact with each other, and the phase side lead wires 104a to 104c are easily hooked. It can be held in the part 110.

Moreover, in the stator 34 of the present embodiment, the outer wall portion 47 has a wall portion main body 47a along the circumferential direction of the ring formed by itself. The hook portion 110 extends from the wall body 47a in a direction away from the core 35 of the stator 34, and extends along the wall body 47a from the first extension 110b. A second extending portion 110c, and an end portion 110d of the second extending portion 110c on the wall main body 47a side is inclined so as to approach the wall main body 47a as the distance from the first extending portion 110b increases. Yes. For this reason, the binding thread 106d is less likely to be displaced in the direction away from the first extension portion 110b, and the binding thread 106d can be prevented from falling off from the second extension portion 110c.

Further, in the stator 34 of the present embodiment, the second extending portion 110c of the hook portion 110 includes a protruding portion 110e extending in a direction approaching the wall main body 47a. Then, even if the binding thread 106d that binds the phase-side lead wires 104a to 104c to the second extending portion 110c is displaced in the direction away from the first extending portion 110b, the movement in the direction is restricted by the protrusion 110e. Therefore, it is possible to prevent the second extending portion 110c from falling off.

Further, in the stator 34 of the present embodiment, the varnish is applied to the binding yarns 106a to 106h in a state where the neutral wire 102 and the respective phase side lead wires 104a to 104c are bound to the hook portions 107 to 114. Since the tying yarns 106a to 106h to which the varnish is applied shrink as the varnish is dried, the neutral wire 102 and the phase side lead wires 104a to 104c can be more firmly held on the hook portions 107 to 114. . Further, it is possible to prevent the tying yarns 106a to 106h from dropping from the hook portions 107 to 114.

Further, in the stator 34 of the present embodiment, the neutral wire 102, the respective phase side connecting wires 103a to 103c, and the respective phase side lead wires 104a to 104c are covered with the insulating members 105a to 105d. It is possible to prevent the phase-side connecting wires 103a to 103c and the phase-side lead wires 104a to 104c from contacting the coils 84 to 92 and energizing. In addition, since the phase-side connecting wires 103a to 103c and the phase-side lead wires 104a to 104c are combined into one by the insulating members 105a to 105c and the phase-side neutral wires 102a to 102c are combined into the insulating member 105d, It becomes easy to bind to the portions 107 to 114.

In the motor 12 of the present embodiment, even if the wire diameters of the coils 84 to 92 are increased and the rigidity of the neutral wire 102, the phase-side connecting wires 103a to 103c, and the phase-side lead wires 104a to 104c is increased, Since these can be tied to the wall portion 47 of the insulator 36 and fixed along the wall portion 47, it is possible to prevent problems such as protrusion of the motor 12 radially outward. Therefore, the motor 12 can increase the wire diameters of the coils 84 to 92 and improve the output.

In the compressor 1 of the present embodiment, since the wire diameter of the coils 84 to 92 of the motor 12 can be increased, the output of the compressor 1 can be improved.

As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

In the above embodiment, the holding portion that holds the crossover wire is a hook portion having a hook-like shape formed on the outer wall portion of the insulator. However, the shape of the holding portion is not limited to the hook shape, and for example, the crossover wire Any shape can be used as long as it can be held by the insulator.

Further, in the above embodiment, the passing hole through which the string is passed is an opening at the upper end of the outer wall portion, but is not limited thereto, and for example, the passing hole may not have an opening at the upper end of the outer wall portion.

In the above embodiment, the insulating member covers a part of the crossover wire. However, the present invention is not limited to this. For example, the insulating member may cover the crossover wire over the entire length.

If the present invention is used, the wire diameter of the coil wound around the teeth of the stator can be increased, and the output of the motor and the compressor can be improved.

1 Scroll compressor (compressor)
12 motor 33 rotor (rotor)
34 Stator
35

Core

36, 37 Insulator 38-46 Projection 47 Outer wall (wall)
47a Wall body 48-56 Inner wall 57-65 Teeth (teeth)
84-92 coil (electric wire)
93 to 101 Slots 102a to 102c Neutral wire (holding part)
103a to 103c Crossover (holding part)
104a to 104c Lead wire (holding part)
105a to 105d Insulating member 106a to 106h Tying thread (holding member)
107-114 Hook part (holding part)
110a, 111a Passing hole (passing part)
110b 1st extension part 110c 2nd extension part 110d end part 110e protrusion part

Claims

A core having a plurality of teeth arranged in an annular shape;
An insulator having a plurality of protrusions disposed at an end of the core and wound with an electric wire together with the teeth, and an annular wall extending in a direction away from the core on a radially outer side of the plurality of protrusions. When,
A holding member for holding the holding portion drawn out from the electric wire wound around the tooth portion and the protruding portion on the wall portion;
A stator characterized by comprising:
The stator according to claim 1, wherein the holding member holds the holding portion on the wall portion so that the holding portion is disposed inside the wall portion.
The wall is
An annular wall body disposed on the core side;
A holding portion extending in a direction away from the core from the wall main body so that a passing portion through which the holding member passes is formed, and
The holding portion includes a first extending portion extending in a direction away from the core from the wall main body, a second extending portion extending along the wall main body from the first extending portion, have,
The stator according to claim 1 or 2, characterized by the above.
The passing portion is formed at a position not facing the electric wire wound around the tooth portion and the protruding portion,
The stator according to claim 3.
5. The stator according to claim 4, wherein an end portion of the second extension portion on the wall portion main body side is inclined so as to approach the wall portion main body as the distance from the first extension portion increases. .
The second extending portion has a protruding portion extending in a direction approaching the wall body.
The stator according to claim 4 or 5, characterized by the above.
The passage part is formed at a position corresponding to the tooth part,
The stator according to any one of claims 3 to 6, characterized by the above.
The holding member is a binding thread that binds the holding portion to the wall portion,
The binding thread is coated with a varnish in a state where the holding portion is bound to the wall portion.
The stator according to any one of claims 1 to 7, wherein the stator is any one of the above.
The holding portion is an insulating member that covers a portion drawn from the electric wire wound around the tooth portion and the protruding portion.
The stator according to any one of claims 1 to 8, wherein the stator is any one of the above.
A motor comprising the stator according to any one of claims 1 to 9.
A compressor comprising the motor according to claim 10.