Stator, electric motor and refrigerant compressor equipped therewith, and air conditioner and refrigerator.

Abstract

The present invention provides a motor stator that avoids or suppresses the complexity of coil winding work. [Solution] The stator comprises a core in which slots 27 are formed between adjacent teeth 22, a pair of insulators that insulate both axial end faces of the core, a coil 13 in which wire 13b is wound around the teeth 22 via the insulators, and an insulating sheet 40 that insulates the space between the core and the coil 13. Both ends of the wire 13b are lead wires 13a drawn upward from the upper insulator 30A. The upper insulator 30A has a hook portion 34 provided at a position that is radially outside and radially inward of the yoke. The hook portion 34 has an opening that leads to its internal region, and the internal region has a spacing larger than the wire diameter of the wire 13b. The lead wires 13a are hooked into the internal region of the hook portion 34 and supported by being raised axially.

Description

Technical Field

[0001] The present invention relates to a stator included in an electric motor, an electric motor or a refrigerant compressor including this stator, and further an air conditioner and a refrigerator including the refrigerant compressor.

Background Art

[0002] When manufacturing a stator included in an electric motor, coils are formed by winding wires around a plurality of tooth portions of the stator. After forming the coils, the end portion (starting end) of the wire that starts the winding and the end portion (ending end) of the wire that ends the winding are pulled out so as to rise axially from the stator to form a pair of lead wires. It is necessary to adjust the lead positions of this pair of lead wires for processing such as husing.

[0003] For example, Patent Document 1 discloses a motor configured to provide an insulator disposed on a core of a stator with a guide having an opening and a holder extending from a part of this guide. A groove is formed in this holder. In Patent Document 1, regarding the starting end and the ending end of the coil after winding, the problem is that the position of the ending end is not uniform due to the winding process or the tension of the coil. Therefore, a guide and a groove are provided in the insulator, and the ending end of the coil is inserted into the opening of the guide and the groove of the holder, and this ending end is aligned in an upright state.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the motor described in Patent Document 1, as mentioned above, the wire end that will be the end of the coil is inserted by passing it through the opening of the guide and fitting it into the groove of the holder. This complicates the work at the end of winding the wire, which may affect the automation of winding. If such a complex operation is to be performed by a winding machine, the structure of the winding machine becomes complex, and the winding machine itself becomes expensive.

[0006] This disclosure was made to solve these problems and aims to provide a motor stator that can avoid or suppress the complexity of coil winding work. [Means for solving the problem]

[0007] To solve the aforementioned problems, the stator according to this disclosure comprises an annular yoke, a core having a plurality of teeth protruding radially inward from the yoke and having slots formed between adjacent teeth, a pair of insulators covering and insulating both axial end faces of the core, a coil formed by winding wire around the teeth via the insulators, and an insulating sheet insulating the core and the coil, wherein one of the axial directions is designated as the upward direction, and the insulator located in the upward direction is designated as the upper insulator, the ends of the wire in the coil are lead wires drawn further upward from the upper insulator, the upper insulator has a hook portion provided on the radially outer and radially inward position of the yoke, the hook portion has an opening connected to its internal region, the internal region has a spacing larger than the wire diameter, and the lead wires are hooked into the internal region of the hook portion and supported by being raised in the axial direction.

[0008] According to the above configuration, a hook portion for securing the lead wire is provided on the inner surface of the outer circumference of the upper insulator of the pair of insulators. This allows the wire to be wrapped around the teeth via the insulator, with the end of the wire (starting end) being secured to the hook portion at the start of wrapping and supported in an upward direction, and the end of the wire (ending end) being secured to the hook portion at the end of wrapping and supported in an upward direction.

[0009] Here, the hook portion is positioned upward and outward from the perspective of the teeth portion, and the internal area of ​​the hook portion has a spacing larger than the wire diameter. Therefore, regardless of whether the end of the lead wire, i.e., the wire wound around the teeth portion, is the start end or the end end, the lead wire is pushed into the opening of the hook portion from the outward and intersecting direction and hooked into the hook portion.

[0010] At this time, by moving the lead wire downwards and rotating the core to move the lead wire in a cross direction, the lead wire can be easily hooked onto the hook. Once the lead wire is hooked onto the hook, it can be supported by raising it axially. This avoids or suppresses the complexity of the coil winding work, and therefore avoids or suppresses the complexity of the structure of the winding machine that winds the wire. Thus, it is possible to effectively avoid or suppress an increase in the manufacturing cost of the stator.

[0011] Furthermore, when using the stator with the above configuration in an electric motor, if the wiring becomes complex due to parallel winding or multi-pole construction of the wires, it becomes possible to automate the manufacturing of the electric motor by providing a busbar at the upper end of the stator. In this case, the lead wires need to be raised upwards, but with the above configuration, by providing a hook portion on the upper insulator, it becomes possible to automate the raising of the lead wires by a winding machine. Therefore, with the above configuration, it becomes possible to automate not only the manufacturing of the stator but also the manufacturing of the electric motor with improved work efficiency.

[0012] Furthermore, in the stator having the above configuration, the core may be a segmented type, composed of multiple segmented cores arranged in a ring, or an integrated type that is not segmented. The disclosure also includes an electric motor equipped with the above configuration, a refrigerant compressor equipped with the above configuration as an electric unit, and an air conditioner or refrigerator equipped with the above configuration. [Effects of the Invention]

[0013] This disclosure provides a stator for an electric motor that, with the above configuration, makes it possible to avoid or suppress the complexity of the coil winding work. [Brief explanation of the drawing]

[0014] [Figure 1] This is a perspective view showing an example of the stator configuration according to Embodiment 1 of this disclosure. [Figure 2] Figure 1 is a top view of the stator, schematically showing the rotor together with the stator. [Figure 3] Figure 1 is a side view of the stator. [Figure 4] Figure 1 is an exploded perspective view showing a typical example of the configuration of the segmented cores of the stator shown. [Figure 5] (A) to (C) are perspective views showing the step-by-step assembly process of the segmented core shown in Figure 4. [Figure 6] (A) is a perspective view showing an example of an insulator provided in the segmented core shown in Figure 4, and (B) is a top view of the insulator shown in (A). [Figure 7] (A) to (C) are partial perspective views showing the starting point of wire winding onto a segmented core (shown in Figure 4) equipped with the insulators shown in Figures 6(A) and 6(B). [Figure 8] (A) to (C) are partial perspective views showing the end of the wire winding on a segmented core (the segmented core shown in Figure 4) equipped with the insulator shown in Figures 6(A) and 6(B). [Figure 9](A) is a perspective view showing an example of an insulator included in the stator according to Embodiment 2 of the present disclosure, and (B) is a top view of the insulator shown in (A). [Figure 10] FIG. 9 is a partial perspective view showing an example of a configuration for supporting a lead wire by a hook portion in a split core including the insulator shown in FIGS. 9(A) and (B). [Figure 11] (A) is a partial perspective view showing an example of a hook portion in an insulator included in the stator according to Embodiment 3 of the present disclosure, and (B) is a partial perspective view showing an example of a configuration for supporting a lead wire by the hook portion shown in (A). [Figure 12] FIG. 9 is a perspective view showing a configuration example of a stator according to Embodiment 4 of the present disclosure. [Figure 13] FIG. 12 is a top view of the stator shown in FIG. 12, schematically showing the rotor together with the stator. [Figure 14] FIG. 12 is a side view of the stator shown in FIG. 12. [Figure 15] FIG. 1 is a cross-sectional view schematically showing a typical configuration example of a motor according to Embodiment 5 of the present disclosure, which includes the stator shown in FIG. 1. [Figure 16] (A) is a schematic block diagram showing a typical configuration example of an air conditioner according to Embodiment 6 of the present disclosure, which uses a refrigerant compressor including the stator shown in FIG. 1, and (B) is a schematic block diagram showing a typical configuration example of a refrigerator according to Embodiment 6 of the present disclosure, which uses a refrigerant compressor including the stator shown in FIG. 1.

Embodiments for Carrying Out the Invention

[0015] Hereinafter, representative embodiments of the present invention will be described with reference to the drawings. In the following, the same or corresponding elements are denoted by the same reference numerals throughout all the drawings, and the overlapping description thereof will be omitted.

[0016] (Embodiment 1) [Configuration Example of Stator] First, a typical configuration example of the stator related to this disclosure will be explained with reference to Figures 1 to 5(A), (B), and (C).

[0017] As shown in Figures 1, 2, and 3, the stator 10A according to this embodiment 1 comprises a core 18A, a coil 13, an upper insulator 30A, and a lower insulator 30B. The core 18A has a cylindrical (annular) yoke 11A. In Figures 1 and 3, the axis 11a of the yoke 11A is shown with a thick dashed line. This axis 11a is the central axis of the core 18A, the central axis of the stator 10A, and the rotation axis of the rotor 15 schematically shown with a dashed line in Figure 2.

[0018] As indicated by the arrows in Figures 1 and 3, and in other drawings, the axial direction parallel to the axis 11a of the yoke 11A is referred to as the up-down direction. In the radial direction of the yoke 11A centered on the axis 11a, the direction toward the axis 11a is referred to as the inward direction, and the opposite direction is referred to as the outward direction. The intersecting direction that crosses the axial and radial directions is referred to as the left-right direction. However, the arrangement of the stator 10A is not limited to these.

[0019] The stator 10A is a segmented type formed by a plurality of segments 12 (12 in the example shown in Figures 1 and 2). As shown in Figures 1 to 3, each segment 12 comprises a segmented core 20, a coil 13, an upper insulator 30A, and a lower insulator 30B, and further comprises an insulating sheet 40, as shown in Figure 4. As shown in Figures 4 and 5(A), the segmented core 20 includes a yoke portion 21 and a teeth portion 22, and as shown in Figures 4 and 5(A), the upper surface of the segmented core 20 in the vertical direction is covered by the upper insulator 30A, and the lower surface of the segmented core 20 is covered by the lower insulator 30B.

[0020] Furthermore, as shown in Figure 5(B), the wire 13b is wound around the teeth portion 22 via the upper insulator 30A and the lower insulator 30B to form the coil 13. Both ends of the wire 13b constituting the coil 13 are lead wires 13a that are further drawn upward from the upper insulator 30A. The lead wires 13a extend upward from each of the multiple (12 in Figures 1 and 2) segmented cores 20 that constitute the core 18A. In this embodiment 1, these lead wires 13a are electrically joined (connected or fastened) to the busbar 19. The upper insulator 30A is provided with a hook portion 34 that hooks onto the lead wires 13a and supports them by raising them axially (upward), as will be described later.

[0021] As shown in Figures 1 to 3, the busbar 19 has an annular shape corresponding to the annular stator 10A, is positioned on the stator 10A, and, as described above, is electrically connected to the lead wires 13a, thereby connecting the coils 13 of the stator 10A that are in phase with each other. The specific configuration of the busbar 19 is not particularly limited, but a typical configuration is shown in Figures 1 to 3, which includes a busbar body 19a made of a conductive material such as metal, and a plurality of busbar terminals 19b arranged on this busbar body 19a. In such a configuration, the busbar terminals 19b only need to be electrically connected to the lead wires 13a. Alternatively, the busbar 19 may be configured as a busbar unit in which a plurality of busbar bodies 19a are covered with a resin outer covering material or the like. The busbar unit may include a busbar substrate or the like of a known configuration.

[0022] The yoke portion 21 has a substantially arc-shaped cross-section perpendicular to the axial direction. In other words, the yoke portion 21 is a part of the divided core 20 that extends in the circumferential direction of the core 18A. The side surface of the yoke portion 21 is provided with a fitting structure for positioning and arranging adjacent yoke portions 21 (i.e., adjacent divided cores 20) side by side. In this embodiment 1, as a fitting structure, for example, one side surface of the yoke portion 21 in the left-right direction is provided with a projection extending vertically from the upper end to the other end of that side surface, and the other side surface is provided with a recess extending vertically from the upper end to the other end of that side surface. By fitting the projection of one yoke portion 21 into the recess of one adjacent yoke portion 21, the 12 yoke portions 21 are arranged adjacently to form a cylindrical yoke 11A.

[0023] Then, the yoke portions 21 adjacent to each other in the circumferential direction are fixed by welding or the like to form a segmented stator 10A. In this stator 10A, twelve segmented cores 20 are connected to form an annular core 18A, and the yoke portions 21 of these segmented cores 20 constitute the yoke 11A. Therefore, in this disclosure, the core 18A is a segmented type formed by arranging a plurality of segmented cores 20 in an annular shape. Furthermore, because the segmented cores 20 constitute the annular core 18A, the plurality of upper insulators 30A and lower insulators 30B that cover the upper and lower surfaces of the plurality of segmented cores 20 are also substantially annular in shape.

[0024] The segmented core 20 of segment 12 is, for example, formed by fixing multiple steel plates stacked vertically by riveting. As shown in Figure 4, the segmented core 20 has a yoke portion 21 and a teeth portion 22 as described above. The segmented core 20 has an upper surface and a lower surface, which are end faces that intersect (for example, orthogonal) with respect to the vertical direction. Except for the fitting structure described above, the segmented core 20 has a shape that is symmetrical with respect to a radially extending centerline.

[0025] The yoke portion 21 has an outer surface and an inner surface that intersect (for example, perpendicular to) the radial direction. For example, the outer surface is a curved surface that is curved in a substantially arc shape in the left-right direction and extends linearly in the up-down direction, while the inner surface is a planar surface parallel to the up-down and left-right directions. Furthermore, the yoke portion 21 has a right side surface and a left side surface as sides that intersect with the left-right direction.

[0026] The teeth portion 22 is positioned in the center of the yoke portion 21 in the left-right direction and protrudes radially inward from the inner surface of the yoke portion 21. Therefore, the inner surface of the yoke portion 21 has a right inner surface positioned to the right of the teeth portion 22 and a left inner surface positioned to the left of the teeth portion 22. The teeth portion 22 is, for example, rectangular parallelepiped and has a right side surface and a left side surface as sides that intersect (for example, orthogonal) with respect to the left-right direction. The right side surface and the left side surface are, for example, planar. Therefore, in this disclosure, each of the multiple divided cores 20 constituting the divided core 18A has a teeth portion 22 that protrudes circumferentially inward. In other words, the teeth portion 22 can be described as a part of the divided core 20 that is erected inward when viewed from the circumferential direction of the core 18A. Alternatively, with respect to the yoke 11A, the teeth portion 22 can be described as a part that protrudes radially inward relative to the yoke 11A.

[0027] As shown in Figure 5(A), the space enclosed by the right side of the teeth portion 22 and the right inner surface of the yoke portion 21 is used as the right slot 27. Similarly, the space enclosed by the left side of the teeth portion 22 and the left inner surface of the yoke portion 21 is used as the left slot 27. Therefore, in this disclosure, each of the multiple divided cores 20 constituting the core 18A has a teeth portion 22, and slots 27 are formed between adjacent teeth portions 22. Furthermore, as shown in Figure 5(B), a coil 13 is formed by winding a wire 13b around the teeth portion 22 via an upper insulator 30A and a lower insulator 30B. This coil 13 is housed in the right slot 27 and the left slot 27.

[0028] The insulating sheet 40 is made of an electrically insulating resin or the like, is a thin sheet, and is elastic and flexible. The insulating sheet 40 electrically insulates the space between the divided core 20 and the coil 13, and between the coils 13 of two adjacent divided cores 20. As shown in Figure 4, two insulating sheets 40 are attached to one divided core 20. Specifically, as shown in Figure 5(A), the right insulating sheet 40 is attached to the right slot 27 of one divided core 20, and the left insulating sheet 40 is attached to the left slot 27. The right insulating sheet 40 and the left insulating sheet 40 have a symmetrical shape with respect to a plane perpendicular to the left-right direction, including the center line of the radially extending teeth portion 22. Therefore, when viewed individually, the right insulating sheet 40 and the left insulating sheet 40 have the same shape.

[0029] The insulating sheet 40 is formed, for example, by cutting and folding a single sheet. The specific shape of the insulating sheet 40, including its folded structure, is not particularly limited. Generally, the insulating sheet 40 has a shape that covers the entire perimeter of the slot 27 in the vertical direction, and it is sufficient that it includes a shape that allows it to be positioned relative to the divided core 20 when attached to the divided core 20.

[0030] When the insulating sheet 40 is attached to the divided core 20, a portion of the insulating sheet 40 is open outwards, as shown in Figure 5(A). Subsequently, as shown in Figure 5(B), once the wire 13b is wound around the teeth portion 22 via the upper insulator 30A, the lower insulator 30B, and the insulating sheet 40 to form the coil 13, the portion of the insulating sheet 40 that is open outwards is folded towards the coil 13 side (the side of the teeth portion 22) to cover the entire side of the coil 13, as shown in Figure 5(C). This insulates adjacent coils 13 from each other in the core 18A.

[0031] [Example of an insulator configuration] Next, a more specific configuration example of the upper insulator 30A, one of the upper insulator 30A and lower insulator 30B provided in the stator 10A according to this disclosure, will be explained with reference to Figures 1 to 5, as well as Figures 6(A) and (B).

[0032] As described above, both axial ends of the divided core 20 are covered and insulated by a pair of insulating members, an upper insulator 30A and a lower insulator 30B. The upper insulator 30A and the lower insulator 30B are made of, for example, an electrically insulating resin.

[0033] The lower surface of the upper insulator 30A and the upper surface of the lower insulator 30B are each formed with mounting protrusions, and the upper and lower surfaces of the divided core 20 are each formed with mounting holes. The upper insulator 30A and the lower insulator 30B are attached to the divided core 20 by inserting the protrusions into the mounting holes. However, the mounting configuration of the upper insulator 30A and the lower insulator 30B to the divided core 20 is not limited to protrusions and mounting holes.

[0034] In this embodiment 1, the upper insulator 30A has an outer flange portion 31, a body portion 32, and an inner flange portion 33, as shown in Figures 6(A) and (B). The outer flange portion 31 of the upper insulator 30A covers the upper surface of the yoke portion 21, the body portion 32 covers the upper surface of the teeth portion 22, and the inner flange portion 33 covers the upper surface of the protruding end of the teeth portion 22. The lower insulator 30b also has an outer flange portion 31, a body portion 32, and an inner flange portion 33, similar to the upper insulator 30A. The outer flange portion 31 of the lower insulator 30B covers the lower surface of the yoke portion 21, the body portion 32 covers the lower surface of the teeth portion 22, and the inner flange portion 33 covers the lower surface of the protruding end of the teeth portion 22.

[0035] Therefore, the lower surface of the upper insulator 30A is an end-face covering surface that covers the upper surface of the divided core 20, and the upper surface of the lower insulator 30B is an end-face covering surface that covers the lower surface of the divided core 20. These end-face covering surfaces are basically planar, but may have one or more recesses that are recessed upward or downward from the end-face covering surface as needed.

[0036] Here, the upper insulator 30A has a hook portion 34 provided on the outer circumference of the core 18A and in a position facing inward in the circumferential direction. With respect to the yoke 11A, the hook portion 34 is provided on the radially outer and radially inward position of the yoke 11A. In this embodiment 1, the hook portion 34 is provided on the outer flange portion 31. The opening of the hook portion 34 (hook opening 34c) is oriented in a direction that intersects with the radial direction. As shown in Figures 1 to 4 and Figures 5(B) and (C), the lead wires 13a of the coil 13 are hooked onto this hook portion 34 and supported in an axial direction.

[0037] In the stator 10A according to this disclosure, the specific configuration of the hook portion 34 is not particularly limited, but in this embodiment 1, it is sufficient that the hook opening 34c intersects with respect to the radial direction (inward or outward direction). In this embodiment 1, the hook portion 34 provided in the upper insulator 30A can be configured as shown in Figures 6(A) and (B), in which a pair of hook portions 34 are provided with their respective hook openings 34c facing each other. The direction of the hook openings 34c of these hook portions 34 is in the left-right direction of the intersecting direction. That is, the hook opening 34c of the right hook portion 34 faces to the left, and the hook opening 34c of the left hook portion 34 faces to the right.

[0038] As described above, if the two hook portions 34 are provided on the upper insulator 30A facing each other, when forming the coil 13, the end of the wire 13b when winding the wire 13b begins (the starting end of the coil 13) and the end of the wire 13b when winding the wire 13b ends (the ending end of the coil 13) can be supported by the pair of hook portions 34, respectively, by raising them axially. Note that the opening direction of the hook opening 34c is not limited to the left-right direction, but may be inclined with respect to the left-right direction.

[0039] A more specific example of the configuration of the hook portion 34 in this embodiment 1 is shown in Figures 6(A) and (B), which includes a support wall portion 34a located on the outer circumference of the upper insulator 30A, and a support projection portion 34b projecting in the left-right direction (or intersecting direction) opposite to the support wall portion 34a. In a hook portion 34 with such a configuration, the space between the support projection portion 34b and the support wall portion 34a becomes a support space 34d, which is an internal region for supporting the leader wire 13a. The hook opening 34c is formed between the tip of the support projection portion 34b and the support wall portion 34a. In this embodiment 1, the support projection portion 34b is linear, i.e., plate-shaped, and is arranged parallel to the support wall portion 34a. Therefore, the support space 34d is a gap of approximately the same width and extends in the left-right direction (intersecting direction).

[0040] In the hook portion 34, the hook opening 34c should be set to be larger than the diameter of the wire 13b. Also, the circumferential dimension (circumferential length) of the support wall portion 34a should be set to be longer than the protruding dimension (protruding length) of the support projection portion 34b. In the example shown in Figures 6(A) and (B), the pair of hook portions 34 are provided so as to be off-center on the right side of the outer flange portion 31, but the position of the hook portion 34 is not limited to this, and it may be located in the center of the circumferential direction on the outer flange portion 31, or it may be off-center on the left side.

[0041] The upper insulator 30A may be provided with recesses or the like for positioning the insulating sheet 40. Furthermore, in this disclosure, the specific configuration of the lower insulator 30B is as described above, and is not limited to having an outer flange portion 31, a body portion 32, and an inner flange portion 33, similar to the upper insulator 30A, and other specific shapes are not particularly limited, similar to the upper insulator 30A.

[0042] [Method for manufacturing stators] A typical example of a manufacturing method for the stator 10A with the above configuration will be described. As shown in Figure 5(A), the upper insulator 30A is attached to the upper surface of the divided core 20, and the lower insulator 30B is attached to the lower surface of the divided core 20. At this time, the end face covering surface of the upper insulator 30A covers the upper surface of the divided core 20 (the upper surface of the yoke portion 21 and the tooth portion 22), and similarly, the end face covering surface of the lower insulator 30B covers the lower surface of the divided core 20. After that, insulating sheets 40 are attached to the left and right slots 27.

[0043] Next, as shown in Figure 5(B), the wire 13b is wound around the teeth portion 22 over the body portion 32 of the insulating sheet 40, the upper insulator 30A, and the lower insulator 30B to form the coil 13. Then, as shown in Figure 5(C), a portion of the insulating sheet 40 that extends radially outward (left-right direction) of the divided core 20 is folded to cover both sides of the coil 13. As a result, the insulating sheet 40 is interposed between the coil 13 in the slot 27 and the divided core 20 around the slot 27, and the divided core 20 and the coil 13 are electrically insulated by the insulating sheet 40.

[0044] In this way, the segments 12 are formed as shown in Figure 5(C). Then, for example, the 12 segments 12 are arranged in a ring in the circumferential direction and the yoke portion 21 is fixed by a known method such as welding, thereby manufacturing the stator 10A as shown in Figures 1 to 3. In this stator 10A, a portion of the insulating sheet 40 is interposed between the coils 13 in adjacent segments 12, so that the coils 13 can be electrically insulated from each other.

[0045] Here, when winding the wire 13b around the divided core 20 to form the coil 13, the process of hooking (locking) the end of the wire 13b onto the hook portion 34 at the start and end of winding will be explained with reference to Figures 7(A)-(C) and 8(A)-(C).

[0046] First, as shown in Figure 7(A), when winding the wire 13b around the teeth portion 22 of the divided core 20 begins, a portion of the insulating sheet 40 overlaps both sides of the teeth portion 22 (the sides facing the slot 27), the body portion 32 of the upper insulator 30A overlaps the upper surface of the teeth portion 22, and the body portion 32 of the lower insulator 30B overlaps the lower surface of the teeth portion 22 (only the upper insulator 30A is shown in Figures 7(A) to (C)). Therefore, the wire 13b is wound around the teeth portion 22 via the insulating sheet 40, the upper insulator 30A, and the lower insulator 30B.

[0047] Before winding the wire 13b, the inside of the divided core 20 is positioned on top and the outside on the bottom. The end of the wire 13b at the start of winding (the starting end of the coil 13) is held by the winding machine 28, which is schematically shown as a cylinder in Figure 7(A). The starting end (wire 13b) is guided to the vicinity of the hook opening 34c of the left hook portion 34 (right side in the figure) of the pair of hook portions 34 of the upper insulator 30A. Subsequently, as shown in Figure 7(B), the wire 13b that will be the starting end is pressed downward (outward from the divided core 20) by a pressing member such as a pin (direction of block arrow D1).

[0048] Next, as shown in Figure 7(C), the divided core 20 is rotated clockwise (to the right) (in the direction of block arrow D2). As a result, the wire 13b (starting end) that was located near the hook opening 34c is guided into the inside of the hook portion 34 (support space 34d). Consequently, the starting end of the coil 13 is hooked onto the hook portion 34 and supported as a lead wire 13a, rising upwards from the divided core 20.

[0049] Next, the winding machine 28 rotates the divided core 20 to wind the wire 13b and form the coil 13. As shown in Figure 8(A), the end of the wire 13b at the end of winding (the end of the coil 13) is guided to the vicinity of the hook opening 34c of the right hook portion 34 (left side in the figure) of the pair of hook portions 34 of the upper insulator 30A. Subsequently, as shown in Figure 8(B), the wire 13b that is the end is pressed downward (outward from the divided core 20) by the pressing member (direction of block arrow D3).

[0050] Next, as shown in Figure 8(C), the divided core 20 is rotated counterclockwise (leftward) (in the direction of block arrow D4). As a result, the wire 13b (end end) that was located near the hook opening 34c is guided into the inside of the hook portion 34 (support space 34d). Consequently, the end end of the coil 13 is hooked onto the hook portion 34 and supported as a lead wire 13a, rising upwards from the divided core 20.

[0051] Conventionally, in refrigerant compressors for refrigeration cycle systems, such as those described later, it was not common to use busbars 19 in the electric section. In order to attach the busbars 19 to the electric motor or the stator 10A of the electric section, since the busbars 19 are positioned on the upper surface of the core 18A, it is necessary to raise the lead wires 13a upwards after the coil 13 is formed by winding the wires 13b.

[0052] Here, a typical field of electric motors in which the busbar 19 is used is, for example, electric vehicle motors. In electric vehicle motors, the wire diameter is large (thick), so the wire itself has high rigidity. Also, when the wire winding is finished, the wire that will be the end of the coil is biased outward from the core. Therefore, when forming a coil by winding a thick wire, the process of raising the start and end ends of the coil is relatively easy.

[0053] In recent years, there has been a trend to increase the number of poles in the electric section of refrigerant compressors. With such an increase in the number of poles, it is expected that busbars 19 will be adopted in the electric section to improve manufacturing efficiency. However, in refrigerant compressors for refrigeration cycle systems, for example, the wire diameter (thinness) of the wire 13b is small (thin) compared to electric vehicle motors, etc. Therefore, the process of raising the ends of the wire 13b, which will be the starting and ending ends of the coil 13, is not easy.

[0054] Therefore, in order to raise the starting and ending ends of the coil 13, it is conceivable to provide a special configuration to the winding machine 28, for example. However, adding a special configuration to the winding machine 28 would make the winding machine 28 itself more expensive, leading to an increase in the manufacturing cost of the stator 10A. In the technology disclosed in the aforementioned Patent Document 1, the wire that will become the ending end of the coil is inserted by passing it through the opening of the guide and fitting it into the groove. With such a conventional configuration, the workability at the end of winding the wire becomes complicated, and as mentioned above, it becomes necessary to add a special configuration to the winding machine 28.

[0055] In contrast, in this disclosure, a hook portion 34 is provided on the outer circumference of the upper insulator 30A, facing inward, as described above. When winding the wire 13b with the winding machine 28, it is not easy to press the wire 13b upward (inward towards the divided core 20), but it is easy to press it downward (outward towards the divided core 20). Furthermore, when winding the wire 13b with the winding machine 28, the divided core 20 is rotated.

[0056] In this disclosure, for example as shown in Figures 7(A) to (C), when starting to wind the wire 13b, the starting end of the coil 13 can be easily hooked onto the hook portion 34 simply by pressing the wire 13b downward in the direction of block arrow D1 and rotating the split core 20 in the direction of block arrow D2. Similarly, when finishing winding the wire 13b, for example as shown in Figures 8(A) to (C), the ending end of the coil 13 can be easily hooked onto the hook portion 34 simply by pressing the wire 13b downward in the direction of block arrow D3 and rotating the split core 20 in the direction of block arrow D3. This makes it possible to easily raise and support the lead wire 13a with the current configuration without providing any special configuration to the winding machine 28.

[0057] Furthermore, in this embodiment 1, since the support wall portion 34a and the support projection portion 34b are substantially parallel, the distance of the support space 34d and the distance of the hook opening 34c are approximately the same, and these distances are larger than the wire diameter (diameter) of the wire 13b. Therefore, even when using wires 13b with different wire diameters, it is not necessary to use upper insulators 30A with different configurations to match the wire diameter of the wire 13b. As disclosed in the aforementioned Patent Document 1, in a configuration in which the wire 13b is fitted into a groove, it becomes necessary to prepare insulators with different grooves to match the wire diameter of the wire 13b. Therefore, according to this embodiment 1, the versatility of the upper insulator 30A is improved, and an increase in manufacturing costs can be effectively avoided or suppressed.

[0058] Furthermore, in this embodiment 1, the hook portion 34 is composed of at least a support wall portion 34a and a support projection portion 34b, and the circumferential dimension (circumferential length) of the support wall portion 34a is larger (longer) than the projection dimension (projection length) of the support projection portion 34b. As a result, by bringing the wire 13b into contact with the support wall portion 34a and moving it by sliding it in the intersecting direction, the wire 13b can be easily guided into the support space 34d. This makes it possible to easily hook and support the wire 13b on the hook portion 34.

[0059] In this disclosure, the wire diameter of the wire 13b used to form the coil 13 is not particularly limited, and the application field of the stator 10A according to this disclosure is not limited to the electric motor section of the refrigerant compressor described above. The stator 10A according to this disclosure can be suitably used in the field of electric motors or electric motor sections that use a busbar 19 and in which the wire diameter of the wire 13b is relatively thin. The wire diameter of the wire 13b used in this disclosure can be, for example, 1.3 mm or less, may be 1.0 mm or less, or 0.9 mm or less, or 0.8 mm or less. The lower limit of the wire diameter of the wire 13b is not particularly limited and may be greater than or equal to the lower limit of a well-known wire diameter used in electric motors or electric motor sections.

[0060] Thus, the stator 10A according to the present disclosure comprises a core 18A in which a plurality of segmented cores 20 are arranged in a ring, each segmented core 20 having a plurality of teeth 22 projecting radially inward, with slots 27 formed between adjacent teeth 22; a pair of insulators 30A, 30B that cover and insulate both axial end faces of the core 18A, a coil 13 in which wire 13b is wound around the teeth 22 via these insulators 30A, 30B; and an insulating sheet 40 that insulates the core 18A and the coil 13. The upper insulator 30A, which has one axial direction facing upward, has both ends of the wire 13b of the coil 13 as lead wires 13a that are further drawn upward from the upper insulator 30A. The upper insulator 30A has a hook portion 34 that is located on the outer circumference of the core 18A and is radially inward. The opening of the hook portion 34A (hook opening 34c) is oriented in a direction that intersects with the radial direction of the core 18A, and the lead wires 13a are hooked onto the hook portion 34 and supported by being raised axially.

[0061] According to the above configuration, a hook portion 34 for securing the lead wire 13a is provided on the inner surface of the outer circumference of the upper insulator 30A of the pair of insulators 30A and 30B. As a result, when winding the wire 13b around the teeth portion 22 via the insulators 30A and 30B, the end of the wire 13b (the starting end of the coil 13) at the start of winding is secured to the hook portion 34 and raised upward for support, and the end of the wire 13b (the ending end of the coil 13) at the end of winding is secured to the hook portion 34 and raised upward for support.

[0062] Here, the hook portion 34 is positioned upward and outward from the perspective of the teeth portion 22, the hook opening 34c is oriented in a crossing direction, and the distance between the hook opening 34c and the support space 34d is greater than the diameter of the wire 13b. Therefore, regardless of whether the end of the lead wire 13a, i.e., the end of the wire 13b wound around the teeth portion 22, is at the start or end of the coil 13, the lead wire 13a is pushed into the hook opening 34c from the outward and crossing direction and hooked onto the hook portion 34.

[0063] At this time, by moving the lead wire 13a downward and rotating the core 18A to move the lead wire 13a in a cross direction, the lead wire 13a can be easily hooked onto the hook portion 34. Once the lead wire 13a is hooked onto the hook portion 34, the lead wire 13a can be supported by raising it axially. This avoids or suppresses the complexity of the winding work of the coil 13, and thus avoids or suppresses the complexity of the structure of the winding machine 28 that winds the wire 13b. Therefore, it is possible to effectively avoid or suppress an increase in the manufacturing cost of the stator 10A.

[0064] Furthermore, when using the stator 10A with the above configuration in an electric motor, if the wiring becomes complicated due to parallel winding or multi-pole construction of the wires 13b, the manufacturing of the electric motor can be automated by providing a busbar 19 at the upper end of the stator 10A. In this case, the lead wires 13a need to be raised upwards, but with the above configuration, by providing a hook portion 34 on the upper insulator 30A, the winding machine 28 can automate the raising of the lead wires 13a. Therefore, with the above configuration, it is possible to automate not only the manufacturing of the stator 10A but also the manufacturing of the electric motor with improved work efficiency.

[0065] (Embodiment 2) In the stator 10A according to Embodiment 1, the hook portion 34 of the upper insulator 30A had a linear support projection 34b. In contrast, the hook portion according to Embodiment 2 has a curved support projection. An example of the configuration of the upper insulator and hook portion according to Embodiment 2 will be specifically described with reference to Figures 9(A), (B) and 10.

[0066] The upper insulator 30C according to this second embodiment, like the upper insulator 30A according to the first embodiment, has an outer flange portion 31, a body portion 32, and an inner flange portion 33, as shown in Figures 9(A) and (B), and the outer flange portion 31 (on the outer circumference side of the core 18A and in a radially inward position) has a hook portion 35.

[0067] The configuration of the hook portion 35 is basically the same as that of the hook portion 34 in the first embodiment, and includes a support wall portion 35a located on the outer circumference side of the upper insulator 30C, and a support projection portion 35b that protrudes in the left-right direction (or intersecting direction) opposite to the support wall portion 35a. The space between the support projection portion 35b and the support wall portion 35a becomes the support space 35d that supports the leader wire 13a. Here, the shape of the support projection portion 35b of the hook portion 35 is such that the tip of the support projection portion 35b is curved toward the support space 35d.

[0068] Furthermore, in the first embodiment, a pair of hook portions 34 were provided with their respective hook openings 34c facing each other. In contrast, in the second embodiment, a pair of hook portions 35 are arranged in parallel on the outer flange portion 31, similar to the first embodiment, but the hook openings 35c do not face each other. As shown in Figures 9(A) and (B), in the left hook portion 35, the hook opening 35c is formed between the tip of the support projection 35b and the support wall portion 35a, except that the support projection 35b is curved, similar to the hook portion 34 in the first embodiment.

[0069] In contrast, in the right hook portion 35, a support side wall portion 35e connected to the support wall portion 35a is formed on the right side surface of the outer flange portion 31, and the hook opening 35c is formed between the tip of the support projection portion 35b and the support side wall portion 35e. In other words, in this second embodiment, the hook opening 35c in the right hook portion 35 faces to the right in the intersecting direction, and the hook opening 35c in the left hook portion 35 faces inward. However, in both the right hook portion 35 and the left hook portion 35, the internal support space 35d has a spacing in the left-right direction (intersecting direction) that is larger than the wire diameter of the wire 13b. Therefore, similar to the first embodiment, the lead wire 13a can be easily hooked onto the hook portion 35 by moving the lead wire 13a downward and rotating the core 18A to move the lead wire 13a in the intersecting direction.

[0070] Furthermore, if two hook portions 35 are provided in parallel on the upper insulator 30C, as shown in Figure 10, when forming the coil 13, the end of the wire 13b when winding begins (the starting end of the coil 13) and the end of the wire 13b when winding ends (the ending end of the coil 13) can be supported upward as a lead wire 13a by raising them axially using each of these hook portions 35. Also, the opening direction of the hook openings 35c does not have to be in an intersecting direction as in Embodiment 1 above; one may open inward. Even in this case, the support projection 35b protrudes in an intersecting direction, and the support space 35d has a distance greater than the wire diameter of the wire 13b in the intersecting direction.

[0071] In addition, the hook portion 35 only needs to have a hook opening 35c that is larger than the wire diameter of the wire 13b. Also, the circumferential dimension (circumferential length) of the support wall portion 35a only needs to be longer than the protruding dimension (protruding length) of the support projection portion 35b. The degree of curvature of the support projection portion 35b is not particularly limited. In the example shown in Figures 9(A) and (B), the two hook portions 35 are provided so as to be off-center on the right side of the outer flange portion 31, but the position of the hook portions 35 is not limited to this, and they may be located in the circumferential center of the outer flange portion 31 or off-center on the left side.

[0072] (Embodiment 3) The hook portion 34 according to Embodiment 1 has a straight support wall portion 34a and a straight support projection portion 34b, and the hook portion 35 according to Embodiment 2 has a straight support wall portion 35a and a curved support projection portion 35b. In contrast, the hook portion according to Embodiment 3 has a curved support wall portion. An example of the configuration of the upper insulator and hook portion according to Embodiment 3 will be specifically described with reference to Figures 11(A) and (B).

[0073] The upper insulator 30D according to this third embodiment has the same basic configuration as the upper insulator 30A according to the first embodiment or the upper insulator 30C according to the second embodiment, so a detailed explanation will be omitted. As shown in Figures 11(A) and (B), the hook portion 36 of the upper insulator 30D includes a curved support wall portion 36a located on the outer circumference of the upper insulator 30D, and a pair of support protrusions 36b that protrude from each other from the left-right direction (or intersecting direction) at a position opposite to the support wall portion 36a.

[0074] In the hook portion 36 according to this third embodiment, similar to the hook portion 34 according to the first embodiment or the hook portion 35 according to the second embodiment, a support space 36d for supporting the leader wire 13a is formed between the support projection 36b and the support wall portion 36a, but the hook opening 36c is formed between the pair of support projections 36b. In this configuration, the support space 36d, which is the internal region of the hook portion 36, is an annular shape close to a circle, but the support space 36d may also be an elliptical annular shape.

[0075] Even with this configuration, the hook portion 36 has a support space 36d, which is an internal region with a spacing larger than the wire diameter of the wire 13b, and a hook opening 36c connected to this support space 36d. Therefore, as in the first or second embodiment, the lead wire 13a can be easily hooked onto the hook portion 36 by moving the lead wire 13a downward and rotating the core 18A to move the lead wire 13a in a crossing direction.

[0076] (Embodiment 4) In Embodiments 1 to 3 described above, a segmented type stator, in which multiple segmented cores are arranged in a ring, was presented as a typical example of the stator configuration according to the Disclosure. However, the Disclosure is not limited thereto, and an integrated type stator that is not segmented may also be used. A typical example of an integrated type stator will be specifically described with reference to Figures 12 to 14.

[0077] The stator 10B according to this fourth embodiment, as shown in Figures 12, 13, and 14, comprises a core 18B, a coil 13, an upper insulator 30A, and a lower insulator 30B, with a busbar 19 provided on the upper surface of the core 18B. The core 18B is a single, undivided unit and has a cylindrical, single-piece yoke 11B. In Figures 12 and 14, as in Figures 1 and 3, the axis 11a of the yoke 11A is shown with a thick dashed line. This axis 11a is the central axis of the core 18B, the central axis of the stator 10B, and the rotation axis of the rotor 15 schematically shown with a dashed line in Figure 13.

[0078] Except for the fact that the core 18B is not divided into multiple segments 12 and the yoke 11B is a single cylindrical shape, the stator 10B according to this embodiment 4 has the same configuration as the stator 10A according to embodiment 1. Therefore, the description of the coil 13, the lower insulator 30B, and the busbar 19 will be omitted, and the description of these configurations will be based on the description of embodiment 1.

[0079] Furthermore, the upper insulator 30A provided in the stator 10B according to this embodiment 4 has the same configuration as that described in embodiment 1. Therefore, the description of the upper insulator 30A is omitted, and the description of embodiment 1 is used to explain its configuration. Moreover, in the stator 10B according to this embodiment 4, the upper insulator 30C according to embodiment 2, or the upper insulator 30D according to embodiment 3, may be used instead of the upper insulator 30A according to embodiment 1. The description of embodiment 2 or the description of embodiment 2 is used to explain the configuration of these upper insulators 30C, 30D.

[0080] Thus, the upper insulators 30A, 30C, or 30D according to this disclosure can be suitably used not only for the segmented stator 10A according to Embodiment 1, but also for the integrated stator 10B according to Embodiment 4.

[0081] (Embodiment 5) In Embodiments 1 to 4 described above, typical configurations of stators according to the present disclosure were explained. In Embodiment 5, a typical configuration of an electric motor equipped with a stator according to any of Embodiments 1 to 4 will be specifically described with reference to Figure 15.

[0082] The electric motor 14 according to Embodiment 5 of this disclosure comprises a stator 10A, a rotor 15, a housing 16, and a busbar 19, as shown in the schematic cross-sectional view of Figure 15. In Figure 15, only the yoke 11A, coil 13, and insulating sheet 40 of the stator 10A are schematically simplified and shown.

[0083] The housing 16 houses the stator 10A and the rotor 15 and is fixed to the stator 10A. The rotor 15 has a cylindrical rotating core 15a and a cylindrical rotating shaft 15b. The rotating core 15a is made up of, for example, multiple steel plates stacked vertically and fixed together by rivets, with permanent magnets embedded inside. The rotating shaft 15b is inserted into the central hole of the rotating core 15a and fixed to the rotating core 15a.

[0084] As schematically shown in Figure 15, the rotor 15 is positioned inside the stator 10A, coaxially with the shaft 11a of the stator 10A, and is rotatably supported by the housing 16 via bearings 17. The outer circumferential surface of the rotor 15 faces the inner circumferential surface of the stator 10A at a distance from it. The busbar 19 is positioned on the stator 10A as described above and, as described above, is electrically connected to the lead wires 13a, thereby connecting the coils 13 of the stator 10A that are in phase with each other.

[0085] The electric motor 14 according to this embodiment 5 is equipped with a stator 10A according to the embodiment 1, and as shown in Figure 1 or Figure 2, the stator 10A is composed of 12 segments 12, and each segment 12 is equipped with one coil 13, so the number of slots is 12, but the number of slots of the stator 10A is not particularly limited. In addition, in the electric motor 14 according to this embodiment 5, the number of poles of the rotor 15 is not particularly limited. In this disclosure, by providing the electric motor 14 with a busbar 19, it is possible to improve manufacturing efficiency when the number of poles of the rotor 15 is increased. Therefore, the number of poles of the rotor 15 may be 8 or more, and the number of slots of the stator 10A may be 9 or more.

[0086] In the motor 14 shown in Figure 15, since it is equipped with a stator 10A according to Embodiment 1, the stator 10A is configured to be equipped with an upper insulator 30A according to Embodiment 1. However, Embodiment 5 is not limited thereto, and a split-type stator 10A equipped with an upper insulator 30C according to Embodiment 2 or an upper insulator 30D according to Embodiment 3 may also be used. Alternatively, the motor 14 shown in Figure 15 may be configured to be equipped with an integrated-type stator 10B according to Embodiment 4, which is equipped with an upper insulator 30A, 30C, or 30D from any of Embodiments 1 to 3, instead of a split-type stator 10A.

[0087] (Embodiment 6) In Embodiment 5, a typical configuration example of an electric motor equipped with a stator according to Embodiment 1 was described. In Embodiment 6, a typical example of an applied device equipped with a stator according to Embodiment 1 as the motor unit, or an applied device equipped with an electric motor according to Embodiment 5 as the motor unit, will be described with reference to Figures 16(A) and (B).

[0088] As described above, the application equipment relating to this disclosure is not particularly limited as long as it includes a split-type stator 10A equipped with the upper insulator 30A according to Embodiment 1, the upper insulator 30C according to Embodiment 2, or the upper insulator 30D according to Embodiment 3, or an integrated-type stator 10B according to Embodiment 4, or an electric motor 14 according to Embodiment 5. In this Embodiment 6, as a typical example of the application equipment relating to this disclosure, a refrigeration cycle system equipped with a refrigerant compressor using the stator 10A according to Embodiment 1 as the electric motor will be described. The specific refrigeration cycle system is not particularly limited, but examples include air conditioners, refrigerators (household and commercial), dehumidifiers, display cases, ice makers, heat pump water heaters, heat pump washing and drying machines, vending machines, etc.

[0089] In this sixth embodiment, an air conditioner will be described as a typical example of a refrigeration cycle system as an applied device. Specifically, as schematically shown in the block diagram of Figure 16(A), the air conditioner 60 according to this sixth embodiment comprises an indoor unit 61 and an outdoor unit 62, and piping 63 connecting them. The indoor unit 61 is equipped with a heat exchanger 64, and the outdoor unit 62 is equipped with a refrigerant compressor 50A, a heat exchanger 65, and a pressure reducing device 66. The refrigerant compressor 50A, as schematically shown in Figure 16(A), comprises an electric unit 51 equipped with a stator 10A and rotor 15 according to the first embodiment, and a compression unit 52.

[0090] The heat exchanger 64 of the indoor unit 61 and the heat exchanger 65 of the outdoor unit 62 are connected in a ring by piping 63, thereby forming a refrigeration cycle. Specifically, the heat exchanger 64 of the indoor unit 61, the refrigerant compressor 50A, the heat exchanger 65 of the outdoor unit 62, and the pressure reducing device 66 are connected in a ring by piping 63 in that order. In addition, a four-way valve 67 for switching between heating and cooling is provided in the piping 63 connecting the heat exchanger 64, the refrigerant compressor 50A, and the heat exchanger 65. Although omitted in Figure 16(A), the indoor unit 61 is equipped with a blower fan, temperature sensor, control unit, etc., and the outdoor unit 62 is equipped with a blower, accumulator, etc. Furthermore, various valve devices (including the four-way valve 67), strainers, etc. are provided in the piping 63.

[0091] The heat exchanger 64 in the indoor unit 61 performs heat exchange between indoor air drawn into the indoor unit 61 by a blower fan and the refrigerant flowing inside the heat exchanger 64. When heating, the indoor unit 61 blows air heated by heat exchange into the room, and when cooling, it blows air cooled by heat exchange into the room. The heat exchanger 65 in the outdoor unit 62 performs heat exchange between outside air drawn into the outdoor unit 62 by a blower and the refrigerant flowing inside the heat exchanger 65.

[0092] The specific configurations of the indoor unit 61 and the outdoor unit 62, as well as the specific configurations of the heat exchanger 64 or heat exchanger 65, pressure reducing device 66, four-way valve 67, blower fan, temperature sensor, control unit, blower, accumulator, other valve devices, strainer, etc., are not particularly limited, and known configurations can be suitably used. Furthermore, the air conditioner 60 may also be equipped with other known configurations.

[0093] An example of the operation of the air conditioner 60 shown in Figure 16(A) will be explained in detail. First, in cooling or dehumidifying operation, the refrigerant compressor 50A of the outdoor unit 62 compresses and discharges the gaseous refrigerant, which is then sent to the heat exchanger 65 of the outdoor unit 62 via the four-way valve 67. The heat exchanger 65 exchanges heat with the outside air, so the gaseous refrigerant condenses and liquefies. The liquefied liquid refrigerant is depressurized by the depressurizing device 66 and sent to the heat exchanger 64 of the indoor unit 61. In the heat exchanger 64, the liquid refrigerant evaporates due to heat exchange with the indoor air and becomes gaseous refrigerant. This gaseous refrigerant returns to the refrigerant compressor 50A of the outdoor unit 62 via the four-way valve 67. The refrigerant compressor 50A compresses the gaseous refrigerant and discharges it again to the heat exchanger 65 via the four-way valve 67.

[0094] In addition, during heating operation, the refrigerant compressor 50A of the outdoor unit 62 compresses and discharges the gaseous refrigerant, which is then sent to the heat exchanger 64 of the indoor unit 61 via the four-way valve 67. In the heat exchanger 64, the gaseous refrigerant condenses and liquefies through heat exchange with the indoor air. The liquefied liquid refrigerant is then depressurized by the depressurizing device 66 to become a gaseous two-phase refrigerant, which is then sent to the heat exchanger 65 of the outdoor unit 62. The heat exchanger 65 exchanges heat between the outside air and the gaseous two-phase refrigerant, so the gaseous two-phase refrigerant evaporates and becomes a gaseous refrigerant, which returns to the refrigerant compressor 50A. The refrigerant compressor 50A compresses the gaseous refrigerant and discharges it again to the heat exchanger 64 of the indoor unit 61 via the four-way valve 67.

[0095] As described above, the refrigerant compressor 50A of the air conditioner 60 according to this embodiment 6 is equipped with an electric motor 51 using the stator 10A according to embodiment 1 (or an electric motor 14 according to embodiment 5 as the electric motor 51), but its specific configuration is not particularly limited. Typically, the refrigerant compressor 50A may have a scroll type or rotary type compression unit 52.

[0096] Alternatively, as another representative example of a refrigeration cycle system as an applied device, a refrigerator will be used as an example. Specifically, as schematically shown in the block diagram of Figure 16(B), the refrigerator 70 according to this embodiment 6 includes a refrigerant compressor 50B, a condenser 71, a pressure reducing device 72, an evaporator 73, and piping 74, as well as a storage chamber 75, etc. As shown in Figure 16(B), the refrigerant compressor 50B includes an electric unit 51 which has a stator 10A and a rotor 15 according to the embodiment 1, and a compression unit 53. In addition, although omitted in Figure 16(B), the refrigerator 70 also includes a main body housing, a blower, an operating unit, a control unit, etc.

[0097] The refrigerant compressor 50B compresses the refrigerant gas into a high-temperature, high-pressure gaseous refrigerant. The condenser 71 cools the refrigerant and liquefies it. The pressure reducing device 72, for example, is composed of a capillary tube and reduces the pressure of the liquefied refrigerant (liquid refrigerant). The evaporator 73 evaporates the refrigerant into a low-temperature, low-pressure gaseous refrigerant. The refrigerant compressor 50B, condenser 71, pressure reducing device 72, and evaporator 73 are connected in this order in a ring by piping 74 through which the refrigerant gas flows, thereby forming a refrigeration cycle. The configuration of the condenser 71, pressure reducing device 72, evaporator 73, piping 74, main body housing, blower, operating unit, control unit, etc., is not particularly limited, and known configurations can be suitably used. Furthermore, the refrigerator 70 may also have other known configurations.

[0098] An example of the operation of the refrigerator 70 shown in Figure 16(B) will be explained in detail. The refrigerant compressor 50B compresses the gaseous refrigerant and discharges it to the condenser 71. The condenser 71 cools the gaseous refrigerant to liquid refrigerant. The liquid refrigerant is depressurized by passing through the depressurization device 72 and sent to the evaporator 73. In the evaporator 73, the liquid refrigerant vaporizes by absorbing heat from the surroundings, becoming gaseous refrigerant and returning to the refrigerant compressor 50B. The refrigerant compressor 50B compresses the gaseous refrigerant and discharges it back to the condenser 71.

[0099] As described above, the refrigerant compressor 50B of the refrigerator 70 according to this embodiment 6 is equipped with an electric unit 51 using the stator 10A according to embodiment 1 (or an electric motor 14 according to embodiment 5 as the electric unit 51), but its specific configuration is not particularly limited. Typically, the refrigerant compressor 50B is one in which the compression unit 53 is of the reciprocating type.

[0100] It should be noted that the application devices related to this disclosure are not limited to refrigeration cycle systems such as the aforementioned air conditioner 60 or refrigerator 70. Other typical application devices include various devices such as blowers, pumps, and power sources for vehicle propulsion.

[0101] (Note) Based on the above description of embodiments, the following technologies are disclosed in this specification. (Technical 1) A stator comprising: an annular yoke; a core having a plurality of teeth protruding radially inward from the yoke, with slots formed between adjacent teeth; a pair of insulators covering and insulating both axial end faces of the core; a coil formed by winding wires around the teeth via the insulators; and an insulating sheet insulating the core from the coil, wherein when one of the axial directions is designated as the upper direction, and the insulator located in the upper direction is designated as the upper insulator, both ends of the wire in the coil become lead wires drawn further upward from the upper insulator; the upper insulator has a hook portion provided on the radially outer and radially inward position of the yoke; the hook portion has an opening connected to its internal region; the internal region has a spacing larger than the wire diameter; and the lead wires are hooked into the internal region of the hook portion and supported by being raised in the axial direction.

[0102] According to the above configuration, a hook portion for securing the lead wire is provided on the inner surface of the outer circumference of the upper insulator of the pair of insulators. This allows the wire to be wrapped around the teeth via the insulator, with the end of the wire (starting end) being secured to the hook portion at the start of wrapping and supported in an upward direction, and the end of the wire (ending end) being secured to the hook portion at the end of wrapping and supported in an upward direction.

[0103] Here, the hook portion is positioned upward and outward from the perspective of the teeth portion, and the internal area of ​​the hook portion has a spacing larger than the wire diameter. Therefore, regardless of whether the end of the lead wire, i.e., the wire wound around the teeth portion, is the start end or the end end, the lead wire is pushed into the opening of the hook portion from the outward and intersecting direction and hooked into the hook portion.

[0104] At this time, by moving the lead wire downwards and rotating the core to move the lead wire in a cross direction, the lead wire can be easily hooked onto the hook. Once the lead wire is hooked onto the hook, it can be supported by raising it axially. This avoids or suppresses the complexity of the coil winding work, and therefore avoids or suppresses the complexity of the structure of the winding machine that winds the wire. Thus, it is possible to effectively avoid or suppress an increase in the manufacturing cost of the stator.

[0105] Furthermore, when using the stator with the above configuration in an electric motor, if the wiring becomes complex due to parallel winding or multi-pole construction of the wires, it becomes possible to automate the manufacturing of the electric motor by providing a busbar at the upper end of the stator. In this case, the lead wires need to be raised upwards, but with the above configuration, by providing a hook portion on the upper insulator, it becomes possible to automate the raising of the lead wires by a winding machine. Therefore, with the above configuration, it becomes possible to automate not only the manufacturing of the stator but also the manufacturing of the electric motor with improved work efficiency.

[0106] (Technical 2) The stator according to Technical 1, wherein the opening of the hook portion is larger than the diameter of the wire.

[0107] (Technical 3) The stator according to Technical 1 or 2, wherein the upper insulator is provided with a pair of hook portions, each with its opening facing the other.

[0108] (Technical 4) The stator according to any one of Technical 1 to 3, wherein the hook portion includes a support wall portion located on the outer circumference side of the upper insulator and a support projection portion projecting in the intersecting direction opposite to the support wall portion, the internal region being between the support projection portion and the support wall portion, and the opening being formed between the tip of the support projection portion and the support wall portion.

[0109] (Technical 5) The stator according to Technical 4, wherein the hook portion is connected to the support wall portion of the upper insulator and has a support side wall portion that extends in the radial direction, and the opening is formed between the tip of the support projection and the support side wall portion.

[0110] (Technical 6) The stator according to Technical 4 or Technical 5, wherein the shape of the support projection or the support wall is curved or straight.

[0111] (Technical 7) The stator according to any one of Technical 4 to Technical 6, wherein the circumferential dimension of the support wall portion is longer than the protruding dimension of the support projection portion.

[0112] (Technical 8) The stator according to any one of Technical 1 to Technical 7, wherein the core is a segmented type composed of multiple segmented cores arranged in a ring, or an integrated type that is not segmented.

[0113] (Technical 9) An electric motor equipped with a stator as described in any one of Technical 1 to 8.

[0114] (Technical 10) An electric motor as described in Technical 9, wherein the number of slots is 9 or more or the number of poles is 8 or more.

[0115] (Technical 11) The electric motor according to Technical 9 or Technical 10, comprising a busbar positioned on the stator, wherein the lead wires and the busbar are electrically connected.

[0116] (Technical 12) A refrigerant compressor equipped with an electric motor as described in any of Technical 9 to Technical 11 as the electric unit.

[0117] (Technical 13) An air conditioner equipped with the refrigerant compressor described in Technical 12.

[0118] (Technical 14) A refrigerator equipped with the refrigerant compressor described in Technical 12.

[0119] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments and multiple variations are also included in the technical scope of the present invention. [Industrial applicability]

[0120] This disclosure can be broadly and suitably used in the field of motor rotors or motors, and further in the field of applied equipment that includes motors or motor components using stators. [Explanation of Symbols]

[0121] 10A: Stator (split type) 10B: Stator (integrated) 11A: York (split type) 11B: Yoke (integrated type) 11a: Axis 12: Segment 13: Coil 13a:Leader line 13b: Wire 14: Electric motor 15: Rotor 18A: Core (split type) 18B: Core (integrated type) 19: Bus bar 20: Split Cores 21: York 22: Teeth Department 27: Slot 28: Winding machine 30A, 30C, 30D: Upper insulator 30B: Lower insulator 31: Outer flange section 32: Torso 33: Inner flange section 34, 35, 36: Hook section 34a, 35a, 36a: Support wall part 34b, 35b, 36b: Support protrusion 34c, 35c, 36c: Hook opening 34d, 35d, 36d: Support space (internal area) 35e: Support side wall part 40: Insulating sheet 50A, 50B: Refrigerant compressor 51: Electric part 52: Compression section 53: Compression section 60: Air conditioner 61: Indoor unit 62:Outdoor unit 63: Piping 64: Heat exchanger 65: Heat exchanger 66: Pressure reducing device 67: Four-way valve 70: Refrigerator 71: Condenser 72: Pressure reducing device 73: Evaporator 74: Piping 75: Storage Room

Claims

1. A core having an annular yoke and a plurality of teeth protruding radially inward from the yoke, with slots formed between adjacent teeth, A pair of insulators that cover and insulate both axial ends of the core, A coil formed by winding a wire around the teeth portion via the insulator, The system includes an insulating sheet that insulates the core and the coil, When one of the axial directions is defined as the upward direction, and the insulator located in that upward direction is designated as the upper insulator, both ends of the wire in the coil become lead wires that are further drawn upward from the upper insulator. The upper insulator has a hook portion provided on the yoke at a position that is radially outward and radially inward, The hook portion has an opening that leads to its internal region, and the internal region has a spacing that is larger than the wire diameter. The leader wire is hooked onto the internal region of the hook portion and supported by being raised in the axial direction. stator.

2. The opening of the hook portion is larger than the diameter of the wire. The stator according to claim 1.

3. The upper insulator is provided with a pair of hook portions, each with its opening facing the other. The stator according to claim 1.

4. The aforementioned hook portion is The support wall portion located on the outer circumference side of the upper insulator, A support projection that protrudes in the intersecting direction opposite to the support wall, Includes, The space between the support projection and the support wall is the internal region, and the opening is formed between the tip of the support projection and the support wall. The stator according to claim 1.

5. The aforementioned hook portion is The upper insulator has a support side wall portion that is connected to the support wall portion and extends in the radial direction, The opening is formed between the tip of the support projection and the support side wall. The stator according to claim 4.

6. The shape of the support projection or the support wall is either curved or straight. The stator according to claim 4.

7. The circumferential dimension of the support wall portion is longer than the protruding dimension of the support projection portion. The stator according to claim 4.

8. The aforementioned core is either a segmented type, composed of multiple segmented cores arranged in a ring, or an unsegmented, integrated type. The stator according to claim 1.

9. An electric motor comprising a stator according to any one of claims 1 to 8.

10. The electric motor according to claim 9, wherein the number of slots is 9 or more or the number of poles is 8 or more.

11. The busbar is positioned on the stator, The lead wire and the busbar are electrically connected. The electric motor according to claim 9.

12. A refrigerant compressor comprising the electric motor described in claim 9 as an electric unit.

13. An air conditioner comprising the refrigerant compressor according to claim 12.

14. A refrigerator comprising the refrigerant compressor according to claim 12.

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