Motor, compressor, and refrigeration cycle device

Abstract

The present invention addresses the problem of high costs that are incurred when a plurality of terminals are provided on the outer peripheral surface of an insulator in order to store a plurality of neutral wires in a state of being insulated from a plurality of coils. A plurality of coils include a first coil (C1) and a second coil (C2) that are adjacent to each other. A plurality of neutral wires (N1-N9) are positioned at one end of a plurality of windings. The plurality of neutral wires (N1-N9) are connected at first ends thereof. An insulating member (170) is disposed in a first space (SP1) between the first coil (C1) and the second coil (C2). The first ends of the plurality of neutral wires (N1-N9) are housed in a cylindrical part (171a) formed in a first member (171) of the insulating member (170). Alternatively, the plurality of neutral wires (N1-N9) are aligned and connected at the first ends, and the first ends of the plurality of neutral wires (N1-N9) are housed in the insulating member.

Description

Motor, compressor, and refrigeration cycle apparatus

[0001] The present disclosure relates to a motor, a compressor, and a refrigeration cycle apparatus.

[0002] As disclosed in Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2008-278692), there is a conventional technique in which a plurality of terminals are provided on the outer peripheral surface of an insulator included in a stator, in order to accommodate a plurality of neutral wires in a state insulated from a plurality of coils.

[0003] When a plurality of terminals are provided on the outer peripheral surface of the insulator as in Patent Document 1, there is a problem of increased cost.

[0004] A motor according to a first aspect includes a stator and a rotor. The stator has a plurality of teeth and a plurality of windings. The plurality of teeth are arranged in an annular shape at intervals. The plurality of windings are wound around each of the plurality of teeth, thereby forming a plurality of coils. The plurality of coils include a first coil and a second coil that are adjacent to each other. The rotor is disposed radially inward of the stator. The rotor rotates about the axis of the stator as a rotation axis. The plurality of neutral wires are located at one end of the plurality of windings. The plurality of neutral wires are connected at a first end portion. The stator includes an insulating member. The insulating member is disposed in a first space between the first coil and the second coil. The insulating member has a first member. A tubular portion is formed in the first member. The tubular portion extends from a second end portion to a third end portion along the axial direction of the stator. The first end portions of the plurality of neutral wires are accommodated in the tubular portion. Alternatively, the plurality of neutral wires are aligned and connected at the first end portions. The first end portions of the plurality of neutral wires are accommodated in the insulating member.

[0005] In the motor according to the first aspect, the plurality of neutral wires are connected at the first end portions. The insulating member is disposed in the first space between the first coil and the second coil. The first end portions of the plurality of neutral wires are accommodated in the tubular portion formed in the first member of the insulating member. As a result, the motor can accommodate the plurality of neutral wires in a state insulated from the plurality of coils while suppressing cost. Further, in the motor, by disposing only the insulating member in which the first end portions of the plurality of neutral wires are accommodated in the first space, the space factor of the first coil and the second coil can be increased.

[0006] In the motor of the first viewpoint, multiple neutral wires are aligned and connected at the first end. An insulating member is placed in the first space between the first coil and the second coil. The first ends of the multiple neutral wires are housed within the insulating member. As a result, the motor can house multiple neutral wires insulated from the multiple coils while keeping costs down. Furthermore, the motor can increase the space utilization ratio of the first and second coils by aligning and connecting the multiple neutral wires at the first end, for example, so that the width in the short-side direction of the cross-section of the first end is reduced.

[0007] The motor in the second view is the motor described in the first view, wherein the first member has a cylindrical portion and a closed portion formed radially along the axial direction. The cylindrical portion is open in the circumferential direction of the stator. The closed portion is closed in the circumferential direction.

[0008] In the second aspect of the motor, this configuration allows for an increase in the space occupied by the first coil and the second coil by utilizing the space between the blocking section and the first coil, and the space between the blocking section and the second coil.

[0009] The motor in the third view is the motor described in the second view, wherein the cylindrical portion is formed radially inward from the closed portion.

[0010] The motor in the fourth view is the motor described in the second view, wherein the cylindrical portion is formed radially outward from the closed portion.

[0011] The motor of the fifth viewpoint is a motor described in any one of the first viewpoints or the fourth viewpoint, wherein the radial length of the first member is less than or equal to the radial length of the first space.

[0012] The motor of the sixth aspect is the motor described in any one of the first to fifth aspects, wherein the second and third ends are open.

[0013] In the sixth aspect, the motor can be cooled by passing a refrigerant gas through the cylindrical part.

[0014] The motor of the seventh aspect is the motor described in any one of the first to sixth aspects, wherein the plurality of neutral wires are inserted into the cylindrical part, passing near the axial side of the first coil. The insulating member has a partition member. The partition member insulates the axial side of the first coil from the plurality of neutral wires.

[0015] The motor in the eighth perspective is the motor described in the seventh perspective, in which the cylindrical part and the partition member are an integrated component.

[0016] The motor of the ninth aspect is the motor described in any one of the first to eighth aspects, wherein a plurality of neutral wires are inserted into the cylindrical portion, passing near the axial side of the first coil. The axial position of the axial end of the first coil is equal to that of the second end, or is closer to the third end than the second end.

[0017] The motor of the tenth viewpoint is the motor described in any one of the first to ninth viewpoints, wherein a fixing portion is formed on the first member. The fixing portion fixes the first member to the stator.

[0018] In the motor described in the tenth viewpoint, this configuration prevents the insulating member from detaching from the stator when the refrigerant gas passes through the cylindrical part.

[0019] The motor of the eleventh view is the motor described in any one of the first to tenth views, wherein the second end is open. When viewed along the axial direction, the opening of the second end has a polygonal shape.

[0020] The motor in the eleventh viewpoint, with this configuration, allows for easier housing of multiple neutral wires within the cylindrical section.

[0021] The motor in the twelfth aspect is the motor described in the first aspect, wherein the multiple neutral wires are connected in a line at the first end.

[0022] The motor in the 13th aspect is the motor described in the first aspect, wherein the multiple neutral wires are connected in two rows at the first end.

[0023] The motor in the 14th aspect is the motor described in the first aspect, wherein the multiple neutral wires are connected in three rows at the first end.

[0024] The motor of the 15th viewpoint is a motor described in any one of the 1st viewpoint, the 12th viewpoint, or the 14th viewpoint, and the insulating member is an insulating cap.

[0025] The motor of the sixteenth aspect is the motor described in any one of the first, twelfth, or fourteenth aspects, and the insulating member has a first member. The first member has a cylindrical portion formed therein. The cylindrical portion extends from a second end to a third end along the axial direction of the stator. The first ends of a plurality of neutral wires are housed within the cylindrical portion.

[0026] The motor in the 17th aspect is the motor described in the 16th aspect, wherein the second end is open. When viewed along the axial direction, the opening at the second end has a polygonal shape. The polygonal shape has its longitudinal direction along the direction of the row of aligned neutral wires.

[0027] The motor in the 17th viewpoint, with this configuration, allows for easier housing of multiple neutral wires within the cylindrical section.

[0028] The compressor of the 18th aspect comprises a motor described in any one of the 17th aspect from the 1st aspect.

[0029] The refrigeration cycle device of the 19th aspect comprises the compressor described in the 18th aspect.

[0030] This is a schematic diagram of the refrigeration cycle device in the first embodiment. This is a control block diagram of the refrigeration cycle device in the first embodiment. This is a side cross-sectional view showing the schematic structure of the compressor in the first embodiment. This is a top view of the stator in the first embodiment. This is a circumferential cross-sectional view of the stator along line segment II-II in Figure 4. This is a diagram showing how the insulating member is arranged in the first space in the first embodiment. This is a top view of the insulating member arranged in the first space in the first embodiment. This is a cross-sectional view of the insulating member arranged in the first space in the first embodiment, viewed from the stator axis side along the radial direction of the stator. This is a diagram showing an example of the process of creating the insulating member in the first embodiment. This is a perspective view of the insulating member in modified example 1B of the first embodiment. This is a top view of the insulating member arranged in the first space in modified example 1B of the first embodiment. This is a diagram showing an example of the process of creating the insulating member in modified example 1B of the first embodiment. This is a schematic diagram of the refrigeration cycle device in the second embodiment. This is a control block diagram of the refrigeration cycle device in the second embodiment. This is a side cross-sectional view showing the schematic structure of the compressor in the second embodiment. This is a top view of the stator in the second embodiment. This is a circumferential cross-sectional view of the stator along line segment II-II in Figure 16. This is a cross-sectional view of the nine neutral wires at the first end, aligned and connected in a single row, in the second embodiment. This figure shows the structure of the insulating member in the second embodiment. This is a cross-sectional view of the insulating member along the line segment V-V in Figure 19. This is a cross-sectional view of the insulating member arranged in the first space in the second embodiment, viewed from the stator axis side along the radial direction of the stator. This is a cross-sectional view of the nine neutral wires at the first end, aligned and connected in two rows, in the second embodiment. This is a cross-sectional view of the nine neutral wires at the first end, aligned and connected in three rows, in the second embodiment. This figure shows how the insulating member is arranged in the first space in the second embodiment. This is a top view of the insulating member arranged in the first space in the second embodiment. This is a cross-sectional view of the insulating member arranged in the first space in the second embodiment, viewed from the stator axis side along the radial direction of the stator. This figure shows an example of the process for creating the insulating member in the second embodiment.

[0031] <First Embodiment> (1) Overall Configuration Diagram 1 is a schematic configuration diagram of the refrigeration cycle device 1. Figure 2 is a control block diagram of the refrigeration cycle device 1. In the refrigeration cycle device 1, a vapor compression refrigeration cycle is performed in the refrigerant circuit 10, in which the refrigerant is compressed, released heat or condensed, depressurized, heated and evaporated, and then compressed again. The refrigerant may be a single refrigerant such as R32, or a mixed refrigerant such as R454C.

[0032] In this embodiment, the refrigeration cycle device 1 is an air conditioner. However, the refrigeration cycle device 1 is not limited to an air conditioner, and may be, for example, a hot water supply device, a floor heating device, a refrigeration device, etc.

[0033] As shown in Figure 1, the refrigeration cycle device 1 mainly comprises a heat source unit 20 and a utilization unit 30.

[0034] (2) Detailed Configuration (2-1) Heat Source Unit The heat source unit 20 is installed, for example, outdoors or in a machine room. As shown in Figure 1, the heat source unit 20 mainly includes a compressor 100, a flow path switching mechanism 22, a heat source heat exchanger 23, an expansion mechanism 24, a heat source fan 25, and an accumulator 41. The heat source unit 20 also has a first control unit 27 that controls the operation of each part that constitutes the heat source unit 20.

[0035] The compressor 100 compresses the low-pressure refrigerant in the refrigeration cycle, which is drawn in from the suction pipe 42a, to the high-pressure level of the refrigeration cycle, and discharges it from the discharge pipe 42b. The compressor 100 is a sealed type compressor in which a positive displacement compression mechanism 130, such as a rotary or scroll type, is driven by a motor 120. Details of the compressor 100 will be described later.

[0036] The flow path switching mechanism 22 is a mechanism that switches the flow path of the refrigerant circuit 10. In this embodiment, the flow path switching mechanism 22 is a four-way switching valve. When the refrigeration cycle device 1 is performing cooling operation, the flow path switching mechanism 22 switches the state of the refrigerant circuit 10 to the first state (solid line in the flow path switching mechanism 22 in Figure 1). When the refrigeration cycle device 1 is performing heating operation, the flow path switching mechanism 22 switches the state of the refrigerant circuit 10 to the second state (dashed line in the flow path switching mechanism 22 in Figure 1).

[0037] The heat source heat exchanger 23 functions as a heat radiator or condenser for the high-pressure refrigerant in the refrigeration cycle during cooling operation of the refrigeration cycle device 1, and functions as an evaporator for the low-pressure refrigerant in the refrigeration cycle during heating operation.

[0038] The expansion mechanism 24 is a mechanism for adjusting the pressure and flow rate of the refrigerant flowing through the refrigerant circuit 10. In this embodiment, the expansion mechanism 24 is an electronic expansion valve with adjustable valve opening.

[0039] The heat source fan 25 draws in outside air from the heat source unit 20 and causes heat exchange to occur between the drawn-in air and the refrigerant flowing through the heat source heat exchanger 23. The heat source fan 25 then blows out the air that has exchanged heat with the refrigerant flowing through the heat source heat exchanger 23 to the outside of the heat source unit 20.

[0040] The accumulator 41 is a refrigerant container that has the function of separating the refrigerant into gas and liquid, and is also capable of storing excess refrigerant in the refrigerant circuit 10 as liquid refrigerant.

[0041] The first control unit 27 has a microcomputer including a CPU and memory. As shown in Figure 2, the first control unit 27 is communicatively connected to the compressor 100, the flow path switching mechanism 22, the expansion mechanism 24, and the heat source fan 25. The first control unit 27 is connected to the second control unit 34 of the user unit 30 via a communication line, and transmits and receives control signals and the like with the second control unit 34.

[0042] (2-2) Utilization Unit The utilization unit 30 is installed, for example, on the walls, ceiling, floor, etc. of the space to be air-conditioned. As shown in Figure 1, the utilization unit 30 mainly comprises a utilization heat exchanger 31 and a utilization fan 32. The utilization unit 30 also has a second control unit 34 that controls the operation of each part that constitutes the utilization unit 30.

[0043] The heat exchanger 31 functions as an evaporator for the low-pressure refrigerant in the refrigeration cycle during cooling operation of the refrigeration cycle device 1, and as a heat exchanger or condenser for the high-pressure refrigerant in the refrigeration cycle during heating operation.

[0044] The utilization fan 32 draws air in the target space into the utilization unit 30, and causes heat exchange between the drawn air and the refrigerant flowing in the utilization heat exchanger 31. The utilization fan 32 blows out the air that has undergone heat exchange with the refrigerant flowing in the utilization heat exchanger 31 to the target space.

[0045] The second control unit 34 includes a microcomputer having a CPU, a memory, and the like. As shown in FIG. 2, the second control unit 34 is communicably connected to the utilization fan 32. The second control unit 34 is connected to the first control unit 27 of the heat source unit 20 via a communication line, and transmits and receives control signals and the like to and from the first control unit 27.

[0046] (3) Compressor FIG. 3 is a side sectional view showing a schematic structure of the compressor 100. As shown in FIG. 3, the compressor 100 of the present embodiment is a single-cylinder rotary compressor. However, the type of the compressor 100 is not limited to a single-cylinder rotary compressor, and may be, for example, a two-cylinder rotary compressor, a scroll compressor, a screw compressor, or the like.

[0047] As shown in FIG. 3, the compressor 100 mainly has a casing 110, a motor 120, a compression mechanism 130, and a shaft 140.

[0048] (3-1) Casing As shown in FIG. 3, the casing 110 is a vertical cylindrical container. The casing 110 has a cylindrical member 112 that is open at the top and bottom, and a bowl-shaped upper lid 114a and a bowl-shaped lower lid 114b provided at the upper end and the lower end of the cylindrical member 112, respectively. The cylindrical member 112, and the upper lid 114a and the lower lid 114b are fixed by welding so as to maintain airtightness.

[0049] The cylindrical member 112 is provided with a suction pipe connection portion 116. A suction pipe 42a is inserted into the suction pipe connection portion 116. The suction pipe 42a inserted into the suction pipe connection portion 116 is connected to the compression mechanism 130. The upper lid 114a is provided with a discharge pipe connection portion 118. A discharge pipe 42b is inserted into the discharge pipe connection portion 118. The high-pressure refrigerant compressed by the compression mechanism 130 is discharged to the discharge pipe 42b via the discharge pipe connection portion 118.

[0050] The casing 110 houses the motor 120, the compression mechanism 130, and the shaft 140. A terminal 200 is attached to the top cover 114a of the casing 110.

[0051] (3-2) Motor The motor 120 drives the compression mechanism 130 via the shaft 140. As shown in Figure 3, the motor 120 is positioned above the compression mechanism 130. The motor 120 mainly consists of a stator 122 and a rotor 124.

[0052] (3-2-1) Stator The stator 122 is a cylindrical member. Figure 4 is a top view of the stator 122. In this embodiment, the axial direction D3 of the stator 122 is vertical. Figure 5 is a cross-sectional view of the stator 122 in the circumferential direction D2 along the line segment II-II in Figure 4. As shown in Figure 4, the stator 122 mainly comprises a core 150 and a plurality of windings. The stator 122 also includes an insulating member 170. Details of the insulating member 170 will be described later.

[0053] (3-2-1-1) The core 150 is fixed to the cylindrical member 112 of the casing 110. As shown in Figures 4 and 5, the core 150 has a core body 151 and an insulator 152.

[0054] The core body 151 is formed by laminating multiple annular electromagnetic steel sheets. The core body 151 has multiple teeth. The multiple teeth are formed from the inner circumferential surface of the core body 151 toward the axis X of the stator 122. In this embodiment, the number of multiple teeth is nine. However, the number of teeth is not limited to nine, and may be three, six, etc. The nine teeth are arranged in an annular shape with intervals between them. Hereinafter, as shown in Figure 4, the nine teeth viewed from above along the axial direction D3 may be described as teeth T1 to T9 in a counterclockwise direction.

[0055] As shown in Figure 5, the insulator 152 is attached to the upper and lower end surfaces of the core body 151. The insulator 152 is a resin insulator that covers teeth T1 to T9. The insulator 152 insulates the core body 151 from the multiple windings.

[0056] (3-2-1-2) Windings The windings are made of an electrical conductor such as copper wire. The diameter of the cross-section of one of the windings is approximately 0.65 mm. In this embodiment, there are nine windings, corresponding to teeth T1 to T9. The nine windings are each wound around teeth T1 to T9, with the insulator 152 in between, thereby forming nine coils. Hereinafter, the windings wound around teeth T1 to T9 may be referred to as windings W1 to W9. The coils formed around teeth T1 to T9 may also be referred to as coils C1 to C9. Coil C1 may be referred to as the first coil C1, coil C2 as the second coil C2, ..., and coil C9 as the ninth coil C9. The first coil C1 and the second coil C2 are adjacent to each other.

[0057] Hereafter, windings W1, W4, and W7 will be described as U-phase windings, windings W2, W5, and W8 as V-phase windings, and windings W3, W6, and W9 as W-phase windings. The nine windings W1 to W9 are connected in a star configuration. Specifically, windings W1, W4, and W7 are wound around teeth T1, T4, and T7 respectively to form the first coil C1, the fourth coil C4, and the seventh coil C7, which are connected in parallel. Windings W2, W5, and W8 are wound around teeth T2, T5, and T8 respectively to form the second coil C2, the fifth coil C5, and the eighth coil C8, which are connected in parallel. Windings W3, W6, and W9 are wound around teeth T3, T6, and T9 respectively to form the third coil C3, the sixth coil C6, and the ninth coil C9, which are connected in parallel. As shown in Figure 5, windings W1, W4, W7, windings W2, W5, W8, and windings W3, W6, W9 are wired along the outer surface of the outer wall portion 152a of the insulator 152. As shown in Figure 4, neutral wires N1, N4, N7 located at one end of windings W1, W4, W7, neutral wires N2, N5, N8 located at one end of windings W2, W5, W8, and neutral wires N3, N6, N9 located at one end of windings W3, W6, W9 are twisted together and connected at the first end portion 91. The diameter of the cross-section of the first end portion 91 is 1.7 to 1.8 mm. The other ends of windings W1, W4, W7, the other ends of windings W2, W5, W8, and the other ends of windings W3, W6, W9 are connected to the terminal 200. Power is supplied to windings W1 to W9 from an external power source via terminal 200.

[0058] (3-2-2) Rotor The rotor 124 is a cylindrical member. The rotor 124 is formed by stacking multiple annular electromagnetic steel sheets. As shown in Figure 3, the rotor 124 is positioned inside the stator 122 in the radial direction D1. The rotor 124 rotates around the axis X of the stator 122 as its axis of rotation. A shaft 140 is inserted into and fixed in the hollow portion of the rotor 124.

[0059] When current is supplied to the motor 120 and current flows through the windings W1 to W9, the rotor 124 rotates in the refrigerant due to the rotating magnetic field generated in the stator 122. As the rotor 124 rotates in the refrigerant, the shaft 140 connected to the rotor 124 also rotates, and driving force is applied to the compression mechanism 130 via the shaft 140.

[0060] (3-3) Compression Mechanism The compression mechanism 130 is a mechanism that compresses the refrigerant drawn in from the suction pipe 42a. The compression mechanism 130 is driven by the motor 120 via a shaft 140 fixed to the motor 120. As shown in Figure 3, the compression mechanism 130 is housed below the motor 120, on the lower side of the casing 110.

[0061] (4) Insulating Member The insulating member 170 is a member for insulating the neutral wires N1 to N9 from the coils C1 to C9. The base material of the insulating member 170 is, for example, PET (polyethylene terephthalate). As shown in Figure 4, the insulating member 170 is placed in the first space SP1 between the first coil C1 and the second coil C2. Figure 6 is a diagram showing how the insulating member 170 is placed in the first space SP1. As indicated by the arrows in Figure 6, the insulating member 170 is inserted into the first space SP1 from top to bottom along the axial direction D3. Figure 7 is a top view of the insulating member 170 placed in the first space SP1. Figure 8 is a cross-sectional view of the insulating member 170 placed in the first space SP1, viewed from the axial X side of the stator 122 along the radial direction D1 of the stator 122. The insulating member 170 mainly comprises a first member 171 and a partition member 172.

[0062] (4-1) First Member As shown in Figure 7, the first member 171 has a cylindrical portion 171a and a closed portion 171b formed along the radial direction D1 when viewed along the axial direction D3. In this embodiment, the cylindrical portion 171a is formed radially D1 inward from the closed portion 171b. The cylindrical portion 171a is open in the circumferential direction D2 of the stator 122. The closed portion 171b is closed in the circumferential direction D2.

[0063] As shown in Figures 6 and 8, the cylindrical portion 171a extends from the second end 92 to the third end 93 along the axial direction D3 of the stator 122. The second end 92 and the third end 93 are open. As shown in Figure 7, when viewed along the axial direction D3, the opening of the second end 92 has a polygonal shape. As shown in Figures 7 and 8, the neutral wires N1, N4, N7, N2, N5, N8, and N3, N6, N9 are inserted into the cylindrical portion 171a from the first end 91, passing near the upper side of the first coil C1, and moving from the second end 92 towards the third end 93. In other words, the first ends 91 of the neutral wires N1 to N9 are housed within the cylindrical portion 171a. The first ends 91 are the portions of the neutral wires N1 to N9 that are inserted into the first space SP1.

[0064] As shown in Figure 7, the radial length D1 L4 of the first member 171 is less than or equal to the radial length D1 L5 of the first space SP1. As shown in Figure 8, in this embodiment, the axial position D3 of the upper end P1 of the first coil C1 is closer to the third end 93 than to the second end 92. The axial position D3 of the upper end P1 of the first coil C1 may also be equal to that of the second end 92.

[0065] (4-2) Partition Member As shown in Figures 6 and 7, the partition member 172 is a sheet-like member. The partition member 172 is connected to the second end 92 of the cylindrical portion 171a. In this embodiment, the cylindrical portion 171a and the partition member 172 are an integrated member. As shown in Figures 7 and 8, by covering the upper part of the first coil C1 with the partition member 172, the partition member 172 insulates the upper part of the first coil C1 from the neutral wires N1 to N9.

[0066] Figure 9 shows an example of the process for creating an insulating member 170. As shown in Figure 9, a sheet-like PET member 180 is prepared. The thickness of the PET member 180 is approximately 0.25 mm. The PET member 180 has a rectangular first region R1 and a second region R2 protruding from the first region R1. The first region R1 has hatched third region R3 and fourth region R4 at both ends. The first region R1 also has a fifth region R5 between the third region R3 and the fourth region R4. Boundary B1, which is part of the boundary between the first region R1 and the second region R2, is cut. In the first region R1, the third region R3 and the fourth region R4 are joined by folding it 90 degrees towards the front of the paper with the dotted line B2 as the axis, and then folding it 90 degrees with the dotted line B3 as the axis. In the PET member 180 in which the third region R3 and the fourth region R4 are joined, the PET member 180 corresponds to the insulating member 170, the first region R1 corresponds to the first member 171, the fifth region R5 corresponds to the cylindrical portion 171a, the third region R3 and the fourth region R4 correspond to the closing portion 171b, and the second region R2 corresponds to the partition member 172.

[0067] (5) Features (5-1) Conventionally, there is a technique to provide multiple terminals on the outer surface of the insulator of the stator in order to house multiple neutral wires in an insulated state from multiple coils. However, providing multiple terminals on the outer surface of the insulator has the problem of being costly.

[0068] The motor 120 of this embodiment comprises a stator 122 and a rotor 124. The stator 122 has a plurality of teeth T1 to T9 and a plurality of windings W1 to W9. The plurality of teeth T1 to T9 are arranged in an annular shape at intervals. The plurality of windings W1 to W9 are wound around each of the plurality of teeth T1 to T9 to form a plurality of coils C1 to C9. The plurality of coils C1 to C9 include adjacent first coils C1 and second coils C2. The rotor 124 is positioned radially D1 inside the stator 122. The rotor 124 rotates around the axis X of the stator 122 as its axis of rotation. The plurality of neutral wires N1 to N9 are located at one end of the plurality of windings W1 to W9. The plurality of neutral wires N1 to N9 are connected at the first end 91. The stator 122 includes an insulating member 170. The insulating member 170 is positioned in the first space SP1 between the first coil C1 and the second coil C2. The insulating member 170 has a first member 171. The first member 171 has a cylindrical portion 171a formed thereon. The cylindrical portion 171a extends from a second end 92 to a third end 93 along the axial direction D3 of the stator 122. The first ends 91 of the multiple neutral wires N1 to N9 are housed within the cylindrical portion 171a.

[0069] In the motor 120 of this embodiment, the multiple neutral wires N1 to N9 are connected at the first end 91. The insulating member 170 is placed in the first space SP1 between the first coil C1 and the second coil C2. The first ends 91 of the multiple neutral wires N1 to N9 are housed in the cylindrical portion 171a formed in the first member 171 of the insulating member 170.

[0070] As a result, the motor 120 can house multiple neutral wires N1 to N9 in an insulated state from multiple coils C1 to C9 while keeping costs down. Furthermore, by placing only an insulating member 170 in the first space SP1 that houses the first ends 91 of the multiple neutral wires N1 to N9, the motor 120 can increase the space utilization ratio of the first coil C1 and the second coil C2.

[0071] (5-2) In the motor 120 of this embodiment, the first member 171 has a cylindrical portion 171a and a closed portion 171b formed along the radial direction D1 when viewed along the axial direction D3. The cylindrical portion 171a is open in the circumferential direction D2 of the stator 122. The closed portion 171b is closed in the circumferential direction D2.

[0072] In this embodiment, the motor 120 can increase the space occupied by the first coil C1 and the second coil C2 by utilizing the space between the blocking portion 171b and the first coil C1, and the space between the blocking portion 171b and the second coil C2.

[0073] (5-3) In the motor 120 of this embodiment, the cylindrical portion 171a is formed radially D1 inward from the closed portion 171b.

[0074] (5-4) In the motor 120 of this embodiment, the length L4 of the first member 171 in the radial direction D1 is less than or equal to the length L5 of the first space SP1 in the radial direction D1.

[0075] (5-5) In the motor 120 of this embodiment, the second end 92 and the third end 93 are open.

[0076] As a result, the motor 120 can be cooled by the passage of refrigerant gas through the cylindrical portion 171a.

[0077] (5-6) In the motor 120 of this embodiment, the multiple neutral wires N1 to N9 are inserted into the cylindrical portion 171a, passing near the upper side (axial direction D3 side) of the first coil C1. The insulating member 170 has a partition member 172. The partition member 172 insulates the upper side (axial direction D3 side) of the stator 122 of the first coil C1 from the multiple neutral wires N1 to N9.

[0078] (5-7) In the motor 120 of this embodiment, the cylindrical portion 171a and the partition member 172 are an integrated component.

[0079] (5-8) In the motor 120 of this embodiment, the multiple neutral wires N1 to N9 are inserted into the cylindrical portion 171a, passing near the upper side (axial direction D3 side) of the first coil C1. The axial direction D3 position of the upper end P1 (axial direction D3 side) of the first coil C1 is equal to that of the second end 92, or is closer to the third end 93 than the second end 92.

[0080] (5-9) In the motor 120 of this embodiment, the second end portion 92 is open. When viewed along the axial direction D3, the opening of the second end portion 92 has a polygonal shape.

[0081] As a result, the motor 120 can more easily house the multiple neutral wires N1 to N9 within the cylindrical portion 171a.

[0082] (5-10) The compressor 100 of this embodiment is equipped with a motor 120.

[0083] (5-11) The refrigeration cycle device 1 of this embodiment includes a compressor 100.

[0084] (6) Modified Examples (6-1) Modified Example 1A In this embodiment, the cylindrical portion 171a is formed radially D1 inward from the closing portion 171b. However, the cylindrical portion 171a may be formed radially D1 outward from the closing portion 171b.

[0085] (6-2) Modification 1B The first member 171 may further have a fixing portion 171c formed thereon. Figure 10 is a perspective view of the insulating member 170' in this modification. Figure 11 is a top view of the insulating member 170' arranged in the first space SP1 in this modification.

[0086] As shown in Figures 10 and 11, the fixing portion 171c is formed at the lower part of the first member 171, at both ends in the circumferential direction D2 of the first member 171. The fixing portion 171c fixes the first member 171 to the stator 122. For example, by fitting the fixing portion 171c into a part of the core 150, the first member 171 is fixed to the stator 122. As a result, the motor 120 can prevent the insulating member 170 from coming off the stator 122 when the refrigerant gas passes through the cylindrical portion 171a.

[0087] Figure 12 shows an example of the process for creating the insulating member 170' in this modified example. The following mainly describes the differences from Figure 9. In Figure 12, compared to Figure 9, the third region R3, fourth region R4, and fifth region R5 are smaller because the first region R1 has a sixth region R6 on the opposite side from the second region R2. Boundaries B4 and B5, which are part of the boundary between the third region R3, fourth region R4, and fifth region R5 and the sixth region R6, are broken. The third region R3 and the fourth region R4 are joined together as in Figure 9. In the PET member 180' in which the third region R3 and the fourth region R4 are joined, the PET member 180' corresponds to the insulating member 170', and the sixth region R6 corresponds to the fixing portion 171c.

[0088] (6-3) Although embodiments of the present disclosure have been described above, it will be understood that various modifications to the form and details are possible without departing from the spirit and scope of the present disclosure as described in the claims.

[0089] <Second Embodiment> (1) Overall configuration diagram 13 is a schematic configuration diagram of the refrigeration cycle device 1. Figure 14 is a control block diagram of the refrigeration cycle device 1. In the refrigeration cycle device 1, a vapor compression refrigeration cycle is performed in the refrigerant circuit 10, in which the refrigerant is compressed, released heat or condensed, depressurized, heated and evaporated, and then compressed again. The refrigerant may be a single refrigerant such as R32, or a mixed refrigerant such as R454C.

[0090] In this embodiment, the refrigeration cycle device 1 is an air conditioner. However, the refrigeration cycle device 1 is not limited to an air conditioner, and may be, for example, a hot water supply device, a floor heating device, a refrigeration device, etc.

[0091] As shown in Figure 13, the refrigeration cycle device 1 mainly comprises a heat source unit 20 and a utilization unit 30.

[0092] (2) Detailed Configuration (2-1) Heat Source Unit The heat source unit 20 is installed, for example, outdoors or in a machine room. As shown in Figure 13, the heat source unit 20 mainly includes a compressor 100, a flow path switching mechanism 22, a heat source heat exchanger 23, an expansion mechanism 24, a heat source fan 25, and an accumulator 41. The heat source unit 20 also has a first control unit 27 that controls the operation of each part that constitutes the heat source unit 20.

[0093] The compressor 100 compresses the low-pressure refrigerant in the refrigeration cycle, which is drawn in from the suction pipe 42a, to the high-pressure level of the refrigeration cycle, and discharges it from the discharge pipe 42b. The compressor 100 is a sealed type compressor in which a positive displacement compression mechanism 130, such as a rotary or scroll type, is driven by a motor 120. Details of the compressor 100 will be described later.

[0094] The flow path switching mechanism 22 is a mechanism that switches the flow path of the refrigerant circuit 10. In this embodiment, the flow path switching mechanism 22 is a four-way switching valve. When the refrigeration cycle device 1 is performing cooling operation, the flow path switching mechanism 22 switches the state of the refrigerant circuit 10 to the first state (solid line in the flow path switching mechanism 22 in Figure 13). When the refrigeration cycle device 1 is performing heating operation, the flow path switching mechanism 22 switches the state of the refrigerant circuit 10 to the second state (dashed line in the flow path switching mechanism 22 in Figure 13).

[0095] The heat source heat exchanger 23 functions as a heat radiator or condenser for the high-pressure refrigerant in the refrigeration cycle during cooling operation of the refrigeration cycle device 1, and functions as an evaporator for the low-pressure refrigerant in the refrigeration cycle during heating operation.

[0096] The expansion mechanism 24 is a mechanism for adjusting the pressure and flow rate of the refrigerant flowing through the refrigerant circuit 10. In this embodiment, the expansion mechanism 24 is an electronic expansion valve with adjustable valve opening.

[0097] The heat source fan 25 draws in outside air from the heat source unit 20 and causes heat exchange to occur between the drawn-in air and the refrigerant flowing through the heat source heat exchanger 23. The heat source fan 25 then blows out the air that has exchanged heat with the refrigerant flowing through the heat source heat exchanger 23 to the outside of the heat source unit 20.

[0098] The accumulator 41 is a refrigerant container that has the function of separating the refrigerant into gas and liquid, and is also capable of storing excess refrigerant in the refrigerant circuit 10 as liquid refrigerant.

[0099] The first control unit 27 has a microcomputer including a CPU and memory. As shown in Figure 14, the first control unit 27 is communicatively connected to the compressor 100, the flow path switching mechanism 22, the expansion mechanism 24, and the heat source fan 25. The first control unit 27 is connected to the second control unit 34 of the user unit 30 via a communication line, and transmits and receives control signals and the like with the second control unit 34.

[0100] (2-2) Utilization Unit The utilization unit 30 is installed, for example, on the walls, ceiling, floor, etc. of the space to be air-conditioned. As shown in Figure 13, the utilization unit 30 mainly comprises a utilization heat exchanger 31 and a utilization fan 32. The utilization unit 30 also has a second control unit 34 that controls the operation of each part that constitutes the utilization unit 30.

[0101] The heat exchanger 31 functions as an evaporator for the low-pressure refrigerant in the refrigeration cycle during cooling operation of the refrigeration cycle device 1, and as a heat exchanger or condenser for the high-pressure refrigerant in the refrigeration cycle during heating operation.

[0102] The utilization fan 32 draws air from the target space into the utilization unit 30 and causes heat exchange to occur between the drawn-in air and the refrigerant flowing through the utilization heat exchanger 31. The utilization fan 32 then blows the air that has exchanged heat with the refrigerant flowing through the utilization heat exchanger 31 back into the target space.

[0103] The second control unit 34 has a microcomputer including a CPU and memory. As shown in Figure 14, the second control unit 34 is connected to the user fan 32 in a communicative manner. The second control unit 34 is connected to the first control unit 27 of the heat source unit 20 via a communication line and transmits and receives control signals and the like with the first control unit 27.

[0104] (3) Compressor Figure 15 is a side cross-sectional view showing the schematic structure of the compressor 100. As shown in Figure 15, the compressor 100 in this embodiment is a single-cylinder rotary compressor. However, the type of compressor 100 is not limited to a single-cylinder rotary compressor, and may be a two-cylinder rotary compressor, a scroll compressor, a screw compressor, etc.

[0105] As shown in Figure 15, the compressor 100 mainly comprises a casing 110, a motor 120, a compression mechanism 130, and a shaft 140.

[0106] (3-1) Casing As shown in Figure 15, the casing 110 is a vertical cylindrical container. The casing 110 has a cylindrical member 112 with openings at the top and bottom, and bowl-shaped upper lids 114a and lower lids 114b provided at the upper and lower ends of the cylindrical member 112, respectively. The cylindrical member 112 and the upper lids 114a and lower lids 114b are fixed together by welding to maintain airtightness.

[0107] A suction pipe connection portion 116 is provided on the cylindrical member 112. A suction pipe 42a is inserted into the suction pipe connection portion 116. The suction pipe 42a inserted into the suction pipe connection portion 116 is connected to the compression mechanism 130. A discharge pipe connection portion 118 is provided on the top cover 114a. A discharge pipe 42b is inserted into the discharge pipe connection portion 118. The high-pressure refrigerant compressed by the compression mechanism 130 is discharged to the discharge pipe 42b via the discharge pipe connection portion 118.

[0108] The casing 110 houses the motor 120, the compression mechanism 130, and the shaft 140. A terminal 200 is attached to the top cover 114a of the casing 110.

[0109] (3-2) Motor The motor 120 drives the compression mechanism 130 via the shaft 140. As shown in Figure 15, the motor 120 is positioned above the compression mechanism 130. The motor 120 mainly consists of a stator 122 and a rotor 124.

[0110] (3-2-1) Stator The stator 122 is a cylindrical member. Figure 16 is a top view of the stator 122. In this embodiment, the axial direction D3 of the stator 122 is vertical. Figure 17 is a cross-sectional view of the stator 122 in the circumferential direction D2 along line segment II-II in Figure 16. As shown in Figure 16, the stator 122 mainly comprises a core 150 and a plurality of windings. The stator 122 also includes an insulating member 190. Details of the insulating member 190 will be described later.

[0111] (3-2-1-1) The core 150 is fixed to the cylindrical member 112 of the casing 110. As shown in Figures 16 and 17, the core 150 has a core body 151 and an insulator 152.

[0112] The core body 151 is formed by laminating multiple annular electromagnetic steel sheets. The core body 151 has multiple teeth. The multiple teeth are formed from the inner circumferential surface of the core body 151 toward the axis X of the stator 122. In this embodiment, the number of multiple teeth is nine. However, the number of teeth is not limited to nine, and may be three, six, etc. The nine teeth are arranged in an annular shape with intervals between them. Hereinafter, as shown in Figure 16, the nine teeth viewed from above along the axial direction D3 may be described as teeth T1 to T9 in a counterclockwise direction.

[0113] As shown in Figure 17, the insulator 152 is attached to the upper and lower end surfaces of the core body 151. The insulator 152 is a resin insulator that covers teeth T1 to T9. The insulator 152 insulates the core body 151 from the multiple windings.

[0114] (3-2-1-2) Windings The windings are made of an electrical conductor such as copper wire. The diameter of the cross-section of one of the windings is approximately 0.65 mm. In this embodiment, there are nine windings, corresponding to teeth T1 to T9. The nine windings are each wound around teeth T1 to T9, with the insulator 152 in between, thereby forming nine coils. Hereinafter, the windings wound around teeth T1 to T9 may be referred to as windings W1 to W9. The coils formed around teeth T1 to T9 may also be referred to as coils C1 to C9. Coil C1 may be referred to as the first coil C1, coil C2 as the second coil C2, ..., and coil C9 as the ninth coil C9. The first coil C1 and the second coil C2 are adjacent to each other.

[0115] Hereafter, windings W1, W4, and W7 will be described as U-phase windings, windings W2, W5, and W8 as V-phase windings, and windings W3, W6, and W9 as W-phase windings. The nine windings W1 to W9 are connected in a star configuration. Specifically, windings W1, W4, and W7 are wound around teeth T1, T4, and T7 respectively to form the first coil C1, the fourth coil C4, and the seventh coil C7, which are connected in parallel. Windings W2, W5, and W8 are wound around teeth T2, T5, and T8 respectively to form the second coil C2, the fifth coil C5, and the eighth coil C8, which are connected in parallel. Windings W3, W6, and W9 are wound around teeth T3, T6, and T9 respectively to form the third coil C3, the sixth coil C6, and the ninth coil C9, which are connected in parallel. As shown in Figure 17, windings W1, W4, W7, windings W2, W5, W8, and windings W3, W6, W9 are wired along the outer surface of the outer peripheral wall portion 152a of the insulator 152. As shown in Figure 16, neutral wires N1, N4, N7 located at one end of windings W1, W4, W7, neutral wires N2, N5, N8 located at one end of windings W2, W5, W8, and neutral wires N3, N6, N9 located at one end of windings W3, W6, W9 are aligned and connected at the first end portion 91 by brazing. In this embodiment, the nine neutral wires are aligned and connected in a single row at the first end portion 91. Figure 18 is a cross-sectional view of the nine neutral wires N1 to N9 at the first end portion 91, which are aligned and connected in a single row. As shown in Figure 18, the width L1 in the short direction of the cross-section of the first end portion 91 is approximately 0.65 mm. The other ends of windings W1, W4, and W7, the other ends of windings W2, W5, and W8, and the other ends of windings W3, W6, and W9 are connected to terminal 200. Power is supplied to windings W1 to W9 from an external power source via terminal 200.

[0116] (3-2-2) Rotor The rotor 124 is a cylindrical member. The rotor 124 is formed by stacking multiple annular electromagnetic steel sheets. As shown in Figure 15, the rotor 124 is positioned inside the stator 122 in the radial direction D1. The rotor 124 rotates around the axis X of the stator 122 as its axis of rotation. A shaft 140 is inserted into and fixed in the hollow portion of the rotor 124.

[0117] When current is supplied to the motor 120 and current flows through the windings W1 to W9, the rotor 124 rotates in the refrigerant due to the rotating magnetic field generated in the stator 122. As the rotor 124 rotates in the refrigerant, the shaft 140 connected to the rotor 124 also rotates, and driving force is applied to the compression mechanism 130 via the shaft 140.

[0118] (3-3) Compression Mechanism The compression mechanism 130 is a mechanism that compresses the refrigerant drawn in from the suction pipe 42a. The compression mechanism 130 is driven by the motor 120 via a shaft 140 fixed to the motor 120. As shown in Figure 15, the compression mechanism 130 is housed below the motor 120, on the lower side of the casing 110.

[0119] (4) Insulating member The insulating member 190 is a member for insulating the neutral wires N1 to N9 from the coils C1 to C9. The base material of the insulating member 190 is, for example, PET (polyethylene terephthalate).

[0120] In this embodiment, the insulating member 190 is an insulating cap. Figure 19 is a diagram showing the structure of the insulating member 190. Figure 20 is a cross-sectional view of the insulating member 190 along the line segment V-V in Figure 19. As shown in Figures 19 and 20, the insulating member 190 is formed by winding a film-like PET material with a thickness of approximately 0.125 mm about 2.5 times. One end PF of the insulating member 190 is formed by folding the end back after winding the film-like PET material and fixing it by ultrasonic welding or the like. The neutral wires N1 to N9 are inserted into the insulating member 190 from the first end 91, from the other end PR of the insulating member 190 toward end PF. In other words, the first ends 91 of the neutral wires N1 to N9 are housed inside the insulating member 190. After the neutral wires N1 to N9 are inserted into the insulating member 190, the insulating member 190 and the neutral wires N1 to N9 are bent at an appropriate bending point P2, and the portion from the bending point P2 to the end PF is placed in the first space SP1 between the first coil C1 and the second coil C2. Specifically, the portion from the bending point P2 to the end PF is inserted into the first space SP1 from top to bottom along the axial direction D3, such that the short side of the cross-section of the first end 91 is aligned with the circumferential direction D2 (the long side of the cross-section of the first end 91 is aligned with the radial direction D1). Figure 21 is a cross-sectional view of the insulating member 190 placed in the first space SP1, viewed from the axis X side of the stator 122 along the radial direction D1 of the stator 122. The first end 91 is the portion of the neutral wires N1 to N9 that is inserted into the first space SP1.

[0121] (5) Features (5-1) Conventionally, there is a technique to provide multiple terminals on the outer surface of the insulator of the stator in order to house multiple neutral wires in an insulated state from multiple coils. However, providing multiple terminals on the outer surface of the insulator has the problem of being costly.

[0122] The motor 120 of this embodiment comprises a stator 122 and a rotor 124. The stator 122 has a plurality of teeth T1 to T9 and a plurality of windings W1 to W9. The plurality of teeth T1 to T9 are arranged in an annular shape at intervals. The plurality of windings W1 to W9 are wound around each of the plurality of teeth T1 to T9 to form a plurality of coils C1 to C9. The plurality of coils C1 to C9 include adjacent first coil C1 and second coil C2. The rotor 124 is positioned radially D1 inside the stator 122. The rotor 124 rotates around the axis X of the stator 122 as its axis of rotation. The plurality of neutral wires N1 to N9 are located at one end of the plurality of windings W1 to W9. The plurality of neutral wires N1 to N9 are aligned and connected at the first end 91. The stator 122 includes an insulating member 190. The insulating member 190 is placed in the first space SP1 between the first coil C1 and the second coil C2. The first ends 91 of the multiple neutral wires N1 to N9 are housed within the insulating member 190.

[0123] In the motor 120 of this embodiment, the multiple neutral wires N1 to N9 are aligned and connected at the first end 91. The insulating member 190 is placed in the first space SP1 between the first coil C1 and the second coil C2. The first ends 91 of the multiple neutral wires N1 to N9 are housed within the insulating member 190.

[0124] As a result, the motor 120 can house multiple neutral wires N1 to N9 insulated from multiple coils C1 to C9 while keeping costs down. Furthermore, the motor 120 can increase the space factor of the first coil C1 and the second coil C2 by aligning and connecting the multiple neutral wires N1 to N9 at the first end 91, for example, so that the width in the short-side direction of the cross-section of the first end 91 is reduced.

[0125] (5-2) In the motor 120 of this embodiment, the multiple neutral wires N1 to N9 are connected in a line at the first end 91.

[0126] (5-3) In the motor 120 of this embodiment, the insulating member 190 is an insulating cap.

[0127] (5-4) The compressor 100 of this embodiment is equipped with a motor 120.

[0128] (5-5) The refrigeration cycle device 1 of this embodiment includes a compressor 100.

[0129] (6) Modified Examples (6-1) Modified Example 1A In this embodiment, the multiple neutral wires N1 to N9 are connected in a single row at the first end 91. However, the multiple neutral wires N1 to N9 may be connected in two rows at the first end 91. Figure 22 is a cross-sectional view of the nine neutral wires N1 to N9 at the first end 91, which are connected in two rows. As shown in Figure 22, the width L2 in the short direction of the cross-section of the first end 91 is approximately 1.213 mm.

[0130] Furthermore, the multiple neutral wires N1 to N9 may be connected in three rows at the first end 91. Figure 23 is a cross-sectional view of the nine neutral wires N1 to N9 at the first end 91, which are connected in three rows. As shown in Figure 23, the width L3 in the short direction of the cross-section of the first end 91 is approximately 1.776 mm.

[0131] (6-2) Modification 1B The stator 122 may include an insulating member 170 instead of the insulating member 190. Figure 24 shows how the insulating member 170 is positioned in the first space SP1. As indicated by the arrows in Figure 24, the insulating member 170 is inserted into the first space SP1 from top to bottom along the axial direction D3. Figure 25 is a top view of the insulating member 170 positioned in the first space SP1. Figure 26 is a cross-sectional view of the insulating member 170 positioned in the first space SP1, viewed from the axial X side of the stator 122 along the radial direction D1 of the stator 122.

[0132] The insulating member 170 mainly comprises a first member 171 and a partition member 172.

[0133] (6-2-1) First Member As shown in Figure 25, the first member 171 has a cylindrical portion 171a and a closed portion 171b formed along the radial direction D1 when viewed along the axial direction D3. The cylindrical portion 171a is formed radially D1 inward from the closed portion 171b. The cylindrical portion 171a is open in the circumferential direction D2 of the stator 122. The closed portion 171b is closed in the circumferential direction D2.

[0134] As shown in Figures 24 and 26, the cylindrical portion 171a extends from the second end 92 to the third end 93 along the axial direction D3 of the stator 122. The second end 92 and the third end 93 are open. As shown in Figures 25 and 26, the neutral wires N1 to N9 are inserted into the cylindrical portion 171a from the first end 91, passing near the upper side of the first coil C1, and moving from the second end 92 towards the third end 93. In other words, the first ends 91 of the neutral wires N1 to N9 are housed within the cylindrical portion 171a. The first ends 91 are the portions of the neutral wires N1 to N9 that are inserted into the first space SP1. The multiple neutral wires N1 to N9 are connected at the first ends 91 by brazing, aligned in one, two, or three rows.

[0135] As shown in Figure 25, when viewed along the axial direction D3, the opening of the second end 92 has a polygonal shape. The polygonal shape has the longitudinal direction of the row of aligned neutral wires N1 to N9. As a result, the motor 120 can more easily house the multiple neutral wires N1 to N9 within the cylindrical portion 171a.

[0136] As shown in Figure 25, the radial length D1 L4 of the first member 171 is less than or equal to the radial length D1 L5 of the first space SP1. As shown in Figure 26, the axial position D3 of the upper end P1 of the first coil C1 is closer to the third end 93 than to the second end 92. The axial position D3 of the upper end P1 of the first coil C1 may also be equal to that of the second end 92.

[0137] (6-2-2) Partition Member As shown in Figures 24 and 25, the partition member 172 is a sheet-like member. The partition member 172 is connected to the second end 92 of the cylindrical portion 171a. The cylindrical portion 171a and the partition member 172 are an integrated member. As shown in Figures 25 and 26, by covering the upper part of the first coil C1 with the partition member 172, the partition member 172 insulates the upper part of the first coil C1 from the neutral wires N1 to N9.

[0138] Figure 27 shows an example of the process for creating an insulating member 170. As shown in Figure 27, a sheet-like PET member 180 is prepared. The thickness of the PET member 180 is approximately 0.25 mm. The PET member 180 has a rectangular first region R1 and a second region R2 protruding from the first region R1. The first region R1 has hatched third region R3 and fourth region R4 at both ends. The first region R1 also has a fifth region R5 between the third region R3 and the fourth region R4. Boundary B1, which is part of the boundary between the first region R1 and the second region R2, is cut. In the first region R1, the third region R3 and the fourth region R4 are joined by folding it 90 degrees towards the front of the paper with the dotted line B2 as the axis, and then folding it 90 degrees again with the dotted line B3 as the axis. In the PET member 180 in which the third region R3 and the fourth region R4 are joined, the PET member 180 corresponds to the insulating member 170, the first region R1 corresponds to the first member 171, the fifth region R5 corresponds to the cylindrical portion 171a, the third region R3 and the fourth region R4 correspond to the closing portion 171b, and the second region R2 corresponds to the partition member 172.

[0139] (6-3) Although embodiments of the present disclosure have been described above, it will be understood that various modifications to the form and details are possible without departing from the spirit and scope of the present disclosure as described in the claims.

[0140] 1 Refrigeration cycle device 91-93 First end to third end 100 Compressor 120 Motor 122 Stator 124 Rotor 170, 170', 190 Insulating member 171 First member 171a Cylindrical part 171b Closure part 171c Fixed part 172 Partition member C1-C9 First coil, second coil, multiple coils D1-D3 Radial, circumferential, and axial directions of the stator L4 Radial length of the first member L5 Radial length of the first space N1-N9 Multiple neutral wires P1 Axial end of the first coil SP1 First space T1-T9 Multiple teeth W1-W9 Multiple windings X Stator shaft

[0141] Japanese Patent Publication No. 2008-278692

Claims

1. A stator (122) having a plurality of teeth (T1 to T9) arranged in a ring shape at intervals, and a plurality of windings (W1 to W9) that are wound around each of the plurality of teeth to form a plurality of coils (C1 to C9) including adjacent first coils (C1) and second coils (C2), and a rotor (124) disposed radially (D2) inward of the stator and rotating about the axis (X) of the stator as the axis of rotation, wherein a plurality of neutral wires (N1 to N9) located at one end of the plurality of windings are connected at the first end (91), and the stator includes insulating members (170, 170', 190) disposed in the first space (SP1) between the first coil and the second coil. Motor (120), wherein the insulating member has a first member (171) having a cylindrical portion (171a) formed thereon, which extends from a second end (92) to a third end (93) along the axial direction (D3) of the stator, and the first ends of the plurality of neutral wires are housed within the cylindrical portion, or the plurality of neutral wires are aligned and connected at the first end, and the first ends of the plurality of neutral wires are housed within the insulating member.

2. The motor (120) according to claim 1, wherein the first member has a cylindrical portion that is open in the circumferential direction (D2) of the stator and a closed portion (171b) that is closed in the circumferential direction, formed along the radial direction when viewed along the axial direction.

3. The motor (120) according to claim 2, wherein the cylindrical portion is formed radially inward from the closed portion.

4. The motor (120) according to claim 2, wherein the cylindrical portion is formed radially outward from the closed portion.

5. The motor (120) according to any one of claims 1 to 4, wherein the radial length (L4) of the first member is less than or equal to the radial length (L5) of the first space.

6. The motor (120) according to any one of claims 1 to 5, wherein the second end and the third end are open.

7. The motor (120) according to any one of claims 1 to 6, wherein the plurality of neutral wires are inserted into the cylindrical portion passing near the axial side of the first coil, and the insulating member has a partition member (172) that insulates the axial side of the first coil from the plurality of neutral wires.

8. The motor (120) according to claim 7, wherein the cylindrical portion and the partition member are an integrated component.

9. The motor (120) according to any one of claims 1 to 8, wherein the plurality of neutral wires are inserted into the cylindrical portion, passing near the axial side of the first coil, and the axial position of the axial end (P1) of the first coil is equal to that of the second end, or is closer to the third end than the second end.

10. The motor (120) according to any one of claims 1 to 9, wherein the first member has a fixing portion (171c) for fixing the first member to the stator.

11. The motor (120) according to any one of claims 1 to 10, wherein the second end is open, and when viewed along the axial direction, the opening of the second end has a polygonal shape.

12. The motor (120) according to claim 1, wherein the plurality of neutral wires are connected in a line at the first end.

13. The motor (120) according to claim 1, wherein the plurality of neutral wires are connected in two rows at the first end.

14. The motor (120) according to claim 1, wherein the plurality of neutral wires are connected in three rows at the first end.

15. The motor (120) according to any one of claims 1, 12 to 14, wherein the insulating member is an insulating cap.

16. The motor (120) according to any one of claims 1, 12 to 14, wherein the insulating member has a first member (171) having a cylindrical portion (171a) formed thereon, which extends from a second end (92) to a third end (93) along the axial direction (D3) of the stator, and the first ends of the plurality of neutral wires are housed within the cylindrical portion.

17. The motor (120) according to claim 16, wherein the second end is open, and when viewed along the axial direction, the opening of the second end has a polygonal shape with the longitudinal direction of the aligned row of neutral wires.

18. A compressor (100) comprising a motor (120) according to any one of claims 1 to 17.

19. A refrigeration cycle device (1) comprising the compressor (100) described in claim 18.

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