Molded motor and outdoor unit

Abstract

A molded motor according to one aspect of the present disclosure comprises: a rotor that rotates about a central axis; a stator that radially faces the rotor and has a coil; a circuit board to which the coil is wired; a motor frame that is formed to cover at least a portion of the stator and the circuit board with a molding resin; a plurality of lead wires that are connected to the circuit board; a lead wire holding member for drawing the plurality of lead wires to the outside of the motor frame; and a tube for bundling and covering the plurality of lead wires to be positioned outside the motor frame. The lead wire holding member has a protruding part that protrudes from the outer surface of the motor frame and is provided with a plurality of openings of a plurality of through-holes. The tube has a facing end part that is disposed via a gap from the plurality of openings. A notched part that extends in the length direction of the tube is provided to the facing end part, and a sealing material that straddles the facing end part and a frame-shaped part and covers the plurality of lead wires is provided to the facing end part.

Description

Molded electric motors and outdoor units

[0001] The present disclosure relates to a molded electric motor and an outdoor unit.

[0002] The outdoor unit of a refrigeration cycle device includes a fan motor and a fan connected to the fan motor. A molded motor, whose stator is molded with a resin, is sometimes used as the fan motor inside the outdoor unit. The molded motor is provided with a lead wire retaining member (bushing) that retains lead wires extending from a motor frame made of the resin (see, for example, Patent Document 1).

[0003] JP 2013-138551 Public Relations

[0004] The lead wire holder has through holes for holding the lead wires. Because the openings of the through holes in the lead wire holder can serve as paths for moisture to penetrate into the motor, the openings of the through holes are preferably sealed with a sealant. However, because the multiple lead wires extending from the openings are arranged side by side with gaps between them, it is difficult for the sealant to get between the lead wires, and it is impossible to improve the reliability of the waterproofing without performing tedious work.

[0005] In view of the above circumstances, one of the objects of the present disclosure is to provide a molded electric motor with improved waterproof reliability, and an outdoor unit equipped with such a molded electric motor.

[0006] One aspect of a molded electric motor according to the present disclosure comprises a rotor that rotates about a central axis, a stator that is radially opposed to the rotor and has a coil, a circuit board to which the coil is connected, a motor frame formed by covering at least a portion of the stator and the circuit board with molded resin, a plurality of lead wires connected to the circuit board, a lead wire holding member that draws the plurality of lead wires to the outside of the motor frame, and a tube that bundles and covers the plurality of lead wires located outside the motor frame, wherein the lead wire holding member has a plurality of through holes that hold each of the plurality of lead wires, an embedded portion that is embedded in the motor frame, and a protruding portion that protrudes from the outer surface of the motor frame and has a plurality of openings for the plurality of through holes, and the tube has an opposing end that is positioned with a gap between it and the plurality of openings, and the opposing end is provided with a notch that extends in the longitudinal direction of the tube, and a sealant that covers the plurality of lead wires across the opposing end and the frame-shaped portion.

[0007] One aspect of a molded electric motor according to the present disclosure comprises a rotor that rotates around a central axis, a stator that is radially opposed to the rotor and has a coil, a circuit board to which the coil is connected, a motor frame formed by covering at least a portion of the stator and the circuit board with molded resin, a plurality of lead wires connected to the circuit board, a lead wire holding member that draws the plurality of lead wires to the outside of the motor frame, and a tube that bundles and covers the plurality of lead wires located outside the motor frame, wherein the lead wire holding member has a plurality of through holes that hold each of the plurality of lead wires, an embedded portion that is embedded in the motor frame, and a protruding portion that protrudes from the outer surface of the motor frame and is provided with a plurality of openings for the plurality of through holes and a frame-shaped portion that surrounds the plurality of openings, and the tube has an opposing end that is positioned with a gap between it and the plurality of openings, and a sealant that covers the plurality of lead wires, spanning the opposing end and the frame-shaped portion.

[0008] One aspect of the outdoor unit according to the present disclosure is an outdoor unit for a refrigeration cycle device, comprising a compressor, a heat exchanger, and a blower that generates an air flow that passes through the heat exchanger, the blower having the above-mentioned molded motor and a rotor that is rotated by the molded motor.

[0009] According to the present disclosure, it is possible to provide a molded electric motor with improved waterproof reliability, and an outdoor unit equipped with such a molded electric motor.

[0010] Fig. 1 is a schematic diagram showing a general configuration of a refrigeration cycle device in a first embodiment. Fig. 1 is a schematic diagram of an outdoor unit in the first embodiment. Fig. 2 is a cross-sectional view of a molded electric motor in the first embodiment. Fig. 3 is a perspective view of a lead wire holding member provided in the molded electric motor in the first embodiment. Fig. 4 is a front view of a tube provided in the molded electric motor in the first embodiment. Fig. 5 is a front view of a modified tube provided in the molded electric motor in the first embodiment. Fig. 6 is a perspective view of a lead wire holding member provided in the molded electric motor in the second embodiment. Fig. 7 is a front view of a tube provided in the molded electric motor in the second embodiment.

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the scope of the present disclosure is not limited to the following embodiments and can be modified as desired within the scope of the technical concept of the present disclosure. In addition, in the following drawings, the scale and number of each structure may differ from the scale and number of the actual structure in order to make each configuration easier to understand.

[0012] The drawings also show X, Y, and Z axes as appropriate. The X axis indicates the front-to-rear direction of the outdoor unit in the following embodiment. The Y axis indicates the width direction of the outdoor unit, which is perpendicular to the front-to-rear direction. The Z axis indicates the vertical direction. The front-to-rear direction, width direction, and vertical direction are perpendicular to one another. The side of the front-to-rear direction toward which the X-axis arrow points (+X side) is the front of the outdoor unit, and the side of the front-to-rear direction opposite to the side toward which the X-axis arrow points (-X side) is the rear of the outdoor unit. The width direction is the left-to-right direction of the outdoor unit. The left-to-right direction is the left-to-right direction when the outdoor unit in the following embodiment is viewed from the front (+X side). In other words, the side of the left-to-right direction toward which the Y-axis arrow points (+Y side) is the right side, and the side of the left-to-right direction opposite to the side toward which the Y-axis arrow points (-Y side) is the left side. The side of the vertical direction toward which the Z-axis arrow points (+Z side) is the upper side, and the opposite side of the vertical direction toward which the Z-axis arrow points (-Z side) is the lower side. Furthermore, in this specification, the front-facing surface of each part may be simply referred to as the front surface, and the rear-facing surface may be referred to as the rear surface.

[0013] (First embodiment) Fig. 1 is a schematic diagram showing a general configuration of a refrigeration cycle apparatus 100 in the first embodiment. In the embodiment, the refrigeration cycle apparatus 100 is an air conditioner. As shown in Fig. 1, the refrigeration cycle apparatus 100 includes an outdoor unit 10, an indoor unit 20, and a circulation path section 18. The outdoor unit 10 is disposed outdoors. The indoor unit 20 is disposed indoors. The outdoor unit 10 and the indoor unit 20 are connected to each other by the circulation path section 18 through which a refrigerant 19 circulates.

[0014] The refrigeration cycle apparatus 100 can adjust the temperature of indoor air by exchanging heat between the refrigerant 19 flowing through the circulation path 18 and the air in a room where the indoor unit 20 is located. Examples of the refrigerant 19 include fluorine-based refrigerants or hydrocarbon-based refrigerants with low global warming potential (GWP). Examples of the refrigerant 19 include a single refrigerant selected from R1234yf, R1234ze, R32, and R290, a mixture of two or more of these refrigerants, or a mixture of any of these refrigerants with another refrigerant. Examples of the refrigerant 19 include a mixture of R1132(E) and R1123. Examples of the refrigerant 19 include mixed refrigerants of R516A, R445A, R444A, R454C, R444B, R454A, R455A, R457A, R459B, R452B, R454B, R447B, R447A, R446A, and R459A.

[0015] The outdoor unit 10 has a housing 11, a compressor 12, a heat exchanger 13, a flow rate adjustment valve 14, a blower 15, a four-way valve 16, and a control unit 17. The housing 11 houses the compressor 12, the heat exchanger 13, the flow rate adjustment valve 14, the blower 15, the four-way valve 16, and the control unit 17.

[0016] The compressor 12, the heat exchanger 13, the flow rate control valve 14, and the four-way valve 16 are provided in a portion of the circulation path 18 that is located inside the housing 11. The compressor 12, the heat exchanger 13, the flow rate control valve 14, and the four-way valve 16 are connected by a portion of the circulation path 18 that is located inside the housing 11.

[0017] The four-way valve 16 is provided in a portion of the circulation path section 18 that is connected to the discharge side of the compressor 12. The four-way valve 16 can reverse the direction of the refrigerant 19 flowing through the circulation path section 18 by switching a portion of the path of the circulation path section 18. When the path connected by the four-way valve 16 is the path shown by the solid line on the four-way valve 16 in Fig. 1, the refrigerant 19 flows through the circulation path section 18 in the direction shown by the solid arrow in Fig. 1. On the other hand, when the path connected by the four-way valve 16 is the path shown by the dashed line on the four-way valve 16 in Fig. 1, the refrigerant 19 flows through the circulation path section 18 in the direction shown by the dashed arrow in Fig. 1.

[0018] The indoor unit 20 has a housing 21, a heat exchanger 22, a blower 23, and a control device 24. The heat exchanger 22, the blower 23, and the control device 24 are housed inside the housing 21. The indoor unit 20 is capable of cooling operation to cool the air in the room where the indoor unit 20 is located, and heating operation to warm the air in the room where the indoor unit 20 is located.

[0019] When the indoor unit 20 is in cooling operation, the refrigerant 19 flowing in the circulation path portion 18 flows in the direction shown by the solid arrow in Fig. 1. In other words, when the indoor unit 20 is in cooling operation, the refrigerant 19 flowing in the circulation path portion 18 circulates through the compressor 12, the heat exchanger 13 of the outdoor unit 10, the flow control valve 14, and the heat exchanger 22 of the indoor unit 20 in that order, before returning to the compressor 12. During cooling operation, the heat exchanger 13 in the outdoor unit 10 functions as a condenser, and the heat exchanger 22 in the indoor unit 20 functions as an evaporator.

[0020] On the other hand, when the indoor unit 20 is in heating operation, the refrigerant 19 flowing in the circulation path portion 18 flows in the direction shown by the dashed line in Fig. 1. In other words, when the indoor unit 20 is in heating operation, the refrigerant 19 flowing in the circulation path portion 18 circulates through the compressor 12, the heat exchanger 22 of the indoor unit 20, the flow control valve 14, and the heat exchanger 13 of the outdoor unit 10 in that order, before returning to the compressor 12. In heating operation, the heat exchanger 13 in the outdoor unit 10 functions as an evaporator, and the heat exchanger 22 in the indoor unit 20 functions as a condenser.

[0021] Next, the outdoor unit 10 will be described in more detail. FIG. 2 is a schematic diagram of the outdoor unit 10. As shown in FIG. 2, the housing 11 of the outdoor unit 10 is in the shape of a substantially rectangular parallelepiped box. The housing 11 has a front panel 11a that covers the interior space of the housing 11 from the front. The front panel 11a is provided with a front opening 11b. The front opening 11b penetrates the front panel 11a in the front-to-rear direction (X-axis direction) and opens to the front. The front opening 11b is covered by a grill (not shown).

[0022] A fan chamber 11A that houses the heat exchanger 13 and the blower 15, and a machine chamber 11B that houses the compressor 12 are provided inside the housing 11. The fan chamber 11A and the machine chamber 11B are separated by a partition member (not shown).

[0023] The blower 15 is located in front of (on the +X side of) the heat exchanger 13. The circulation path portion 18 is connected to the heat exchanger 13. A refrigerant flows inside the heat exchanger 13. The heat exchanger 13 is cooled by the blower 15.

[0024] The blower 15 has a molded electric motor 60 having a rotating shaft 62c and a rotor 15b fixed to the rotating shaft 62c. The rotor 15b is rotated around the central axis J by the molded electric motor 60. The rotor 15b is disposed inside the housing 11 facing the front opening 11b. The rotor 15b is also disposed in front of the heat exchanger 13. By rotating the rotor 15b, the blower 15 blows air from the front opening 11b toward the front of the housing 11 and passes the air through the heat exchanger 13.

[0025] 3 is a cross-sectional view of a molded motor 60 according to this embodiment. The molded motor 60 according to this embodiment is an inner rotor type motor. However, the molded motor 60 may be an outer rotor type motor.

[0026] The molded motor 60 of this embodiment comprises a rotor 62, a stator 61, a circuit board 63, a motor frame 64, a pair of bearings 67, 68, a bearing holder 66, a cover 69, a lead wire holding member 70, a plurality of lead wires 80, and a tube 90.

[0027] The rotor 62 rotates around the central axis J. In the following description of the molded electric motor 60, the direction parallel to the central axis J may be referred to as the "axial direction," and the radial direction relative to the central axis J may be simply referred to as the "radial direction." Furthermore, the radial direction away from the central axis J may be referred to as the "radially outward direction," and the radial direction approaching the central axis J may be referred to as the "radially inward direction." In this embodiment, the axial direction coincides with the front-to-rear direction (X-axis direction).

[0028] The rotor 62 has a rotating shaft 62c, a rotor core 62a, and a plurality of magnets 62b. The rotating shaft 62c extends in the axial direction about a central axis J. The rotating shaft 62c is supported by a pair of bearings 67, 68. The rotor core 62a is fixed to the outer circumferential surface of the rotating shaft 62c. The plurality of magnets 62b are assembled to the rotor core 62a.

[0029] The stator 61 faces the rotor 62 in the radial direction. The stator 61 is annular about the central axis J and surrounds the rotor 62 from the radially outer side. The stator 61 has a stator core 61a and a coil 61b. The stator core 61a has an annular core back and a plurality of teeth protruding radially inward from the core back. The coil 61b is formed by winding a coil wire around the teeth.

[0030] The circuit board 63 is located behind (-X) the stator 61. The circuit board 63 is disposed perpendicular to the central axis J. An end of the coil wire that constitutes the coil 61b is connected to the circuit board 63. In other words, the coil 61b is connected to the circuit board 63. The circuit board 63 controls the voltage applied to the coil 61b, thereby controlling the rotation of the rotor 62.

[0031] The motor frame 64 forms the outer shell of the molded motor 60. The motor frame 64 is formed by covering at least a portion of the stator 61 and the circuit board 63 with mold resin 64M. The motor frame 64 is provided with a recessed portion 64a extending in the front-to-rear direction about the central axis J. The recessed portion 64a opens forward. The rotor 62 is disposed inside the recessed portion 64a. A bearing holding portion 64b is formed at the bottom of the recessed portion 64a. The bearing holding portion 64b has a cylindrical surface facing radially inward, and this cylindrical surface holds a bearing 68 from the radially outer side. A bearing holder 66 is fixed to the opening of the recessed portion 64a. The bearing holder 66 holds a bearing 67. A cover 69 covering the bearing holder 66 is disposed in front of the bearing holder 66. The motor frame 64 has a protruding portion 64c on its outer peripheral surface facing radially outward. The protrusion 64c protrudes radially outward, and a part of the lead wire holding member 70 is embedded inside the protrusion 64c.

[0032] The plurality of lead wires 80 transmit power and control signals to be supplied to the circuit board 63. The plurality of lead wires 80 have a first end 80a and a second end 80b, and the first end 80a is connected to the circuit board 63. In addition, a connector portion 89 is provided at the second end 80b. The connector portion 89 is connected to the control unit 17 (see FIG. 1 ) of the outdoor unit 10. Therefore, the plurality of lead wires 80 connect the circuit board 63 of the molded motor 60 and the control unit 17 of the outdoor unit 10.

[0033] The plurality of lead wires 80 are drawn from the inside to the outside of the motor frame 64. The plurality of lead wires 80 are embedded in the motor frame 64 at first ends 80a and exposed from the motor frame 64 at second ends 80b. The plurality of lead wires 80 are bundled outside the motor frame 64 and covered with a tube 90.

[0034] The lead wire holding member 70 draws the plurality of lead wires 80 out of the motor frame 64. The lead wire holding member 70 holds the plurality of lead wires 80. The lead wire holding member 70 is also held by the motor frame 64.

[0035] FIG. 4 is a perspective view of a lead wire holding member 70 provided in a molded electric motor 60 of this embodiment. The lead wire holding member 70 has a block-shaped first member 71 and a second member 72. The first member 71 and the second member 72 are stacked in the front-to-rear direction. The first member 71 is located forward (+X) of the second member 72. The first member 71 has a first opposing surface 71f facing rearward (-X). The first opposing surface 71f has a plurality of first grooves 71g extending in the vertical direction (Z-axis direction). The second member 72 has a second opposing surface 72f facing forward (+X). The second opposing surface 72f has a plurality of second grooves 72g extending in the vertical direction (Z-axis direction). The first opposing surface 71f and the second opposing surface 72f face each other and are in contact with each other. The first groove 71g and the second groove 72g face each other and overlap to form a through hole 70h. That is, the lead wire holding member 70 has a plurality of through holes 70h. The through holes 70h penetrate the lead wire holding member 70 in the vertical direction (Z-axis direction). The through holes 70h are circular when viewed in the vertical direction. A lead wire 80 is passed through each through hole 70h. That is, the plurality of through holes 70h hold each of the plurality of lead wires 80. Furthermore, the first member 71 and the second member 72 sandwich the plurality of lead wires 80 from the front-rear direction (X-axis direction).

[0036] A portion of the lead wire holding member 70 is embedded in the protruding portion 64c of the motor frame 64, and another portion protrudes from the outer surface of the motor frame 64 and is exposed therefrom. That is, the lead wire holding member 70 has an embedded portion 70b that is embedded in the motor frame 64 and a protruding portion 70a that protrudes from the outer surface of the motor frame 64. The protruding portion 70a has a growing surface 70d that faces downward (-Z). The growing surface 70d is provided with openings 70k for multiple through holes 70h. The multiple openings 70k are aligned linearly in the left-right direction (Y-axis direction). Multiple lead wires 80 extend from each opening 70k.

[0037] The first member 71 and the second member 72 of the lead wire holding member 70 are held in a mold that molds the motor frame 64 with the lead wire 80 sandwiched between them. The protruding portion 70a is sandwiched between the mold that opens and closes in the front-to-rear direction (X-axis direction), and the embedded portion 70b is positioned within the cavity of the mold. This allows the protruding portion 70a to protrude from the outer surface of the motor frame 64 and the embedded portion 70b to be embedded inside the motor frame 64.

[0038] 5 is a front view of a tube 90 provided in the molded motor 60 of this embodiment. The tube 90 is flexible. The tube 90 bundles and covers the multiple lead wires 80 located outside the motor frame 64. The tube 90 has an opposing end 91 that faces the protruding surface 70d of the lead wire holding member 70. In other words, the opposing end 91 is positioned with a gap between it and the multiple openings 70k.

[0039] In this embodiment, a sealant 9 is provided in the region between the opposing end 91 of the tube 90 and the protruding portion 64c of the motor frame 64. The sealant 9 is applied to the target region in an uncured state and then cured. An acrylic-modified silicone resin is preferably used as the sealant 9. Acrylic-modified silicone resin has excellent heat resistance and cold resistance. Therefore, by using an acrylic-modified silicone resin as the sealant 9, the sealing properties of the sealant 9 can be maintained even when used outdoors regardless of the season. Furthermore, since the acrylic-modified silicone resin cures at room temperature, heating for curing is not required, simplifying the manufacturing process of the molded electric motor 60.

[0040] The sealing material 9 has a first seal portion 9a, a second seal portion 9b, a third seal portion 9c, and a fourth seal portion 9d. The first seal portion 9a, the second seal portion 9b, the third seal portion 9c, and the fourth seal portion 9d are connected to one another. The first seal portion 9a covers the multiple lead wires 80. The first seal portion 9a seals the gap between the opening 70k and the lead wires 80. The second seal portion 9b covers the surface of the protruding portion 70a. The second seal portion 9b seals the gap at the boundary between the first member 71 and the second member 72. The third seal portion 9c covers the boundary between the protruding portion 70a and the motor frame 64. The third seal portion 9c seals the gap at the boundary between the motor frame 64 and the lead wire holding member 70. The fourth seal portion 9d covers the leading edge of the opposing end 91 of the tube 90. The fourth seal portion 9 d , together with the first seal portion 9 a , seals the gap between the lead wire 80 and the tube 90 .

[0041] According to this embodiment, the sealing material 9 blocks the path of water infiltration into the interior of the motor frame 64 at the first sealing portion 9a, the second sealing portion 9b, and the third sealing portion 9c, and protects the circuit board 63 arranged inside the motor frame 64.

[0042] According to this embodiment, the sealant 9 seals the gaps between the lead wires 80 and the tubes 90 at the first seal portion 9a and the fourth seal portion 9d. Because the lead wires 80 extending from the opening 70k are aligned in the left-right direction with a gap between them, the sealant 9 may not fully wrap around the gaps between the lead wires 80, leaving uncoated areas between the lead wires 80. If these uncoated areas reach the lower (-Z side) end of the sealant 9, they may become a path for water to penetrate into the motor frame 64. According to this embodiment, the sealant 9 covers the entirety of the lead wires 80 between the opposing end 91 and the protruding portion. This prevents uncoated areas that may be formed between the lead wires 80 from becoming a path for water penetration, thereby protecting the circuit board 63 from water. According to this embodiment, a molded electric motor 60 with improved waterproof reliability can be provided.

[0043] In this embodiment, the opposing end 91 is provided with a single notch 91c extending in the longitudinal direction of the tube 90. The lead wires 80 are tightly bundled inside the tube 90. Meanwhile, the lead wires 80 are held by the lead wire holding member 70 with gaps between them in the left-right direction. Therefore, the lead wires 80 extend so as to widen in the left-right direction between the opposing end 91 and the opening 70k. According to this embodiment, the notch 91c is provided in the opposing end 91, thereby widening the opening of the opposing end 91. This allows the tip of the opposing end 91 to be closer to the opening 70k than when the notch 91c is not provided, thereby reducing the amount of sealant 9 (first seal portion 9a) used between the opposing end 91 and the protruding portion 70a.

[0044] Furthermore, according to this embodiment, by bringing the opposing end 91 close to the protruding portion 70a, at least a portion of the gap between the lead wires 80 can be covered with the tube 90. Therefore, when applying uncured sealant 9 to a plurality of lead wires 80 with the direction of gravity being the depth direction of the paper in Fig. 5, it is possible to prevent the uncured sealant 9 from flowing down to the opposite side from the gap between the lead wires 80, thereby simplifying the application process of the sealant 9 and reducing the amount of sealant 9 used.

[0045] 5 illustrates a case in which the sealing material 9 covers the outer periphery of the tube 90 over the entire circumference of an area equivalent to the depth of the cut portion 91c of the tube 90. However, the sealing material 9 may cover only the tip edge of the opposing end portion 91 and the cut portion 91c.

[0046] (Summary of First Embodiment) As shown in FIG. 3 , the molded motor 60 of this embodiment includes a rotor 62, a stator 61, a circuit board 63, a motor frame 64, a plurality of lead wires 80, a lead wire holder 70, and a tube 90. The rotor 62 rotates around a central axis J. The stator 61 faces the rotor 62 in the radial direction and has a coil 61b. The coil 61b is connected to the circuit board 63. The motor frame 64 is formed by covering at least a portion of the stator 61 and the circuit board 63 with a mold resin 64M. The plurality of lead wires 80 are connected to the circuit board 63. The lead wire holder 70 extends the plurality of lead wires 80 to the outside of the motor frame 64. The tube 90 bundles and covers the plurality of lead wires 80 located outside the motor frame 64. As shown in FIG. 4 , the lead wire holding member 70 has a plurality of through holes 70h that hold the plurality of lead wires 80, an embedded portion 70b that is embedded in the motor frame 64, and a protruding portion 70a that protrudes from the outer surface of the motor frame 64. The protruding portion 70a has a plurality of openings 70k for the plurality of through holes 70h. The tube 90 has an opposing end 91 that is disposed with gaps between it and the plurality of openings 70k. The opposing end 91 has a notch 91c that extends in the longitudinal direction of the tube 90. As shown in FIG. 5 , a sealant 9 is provided across the opposing end 91 and the protruding portion 70a to cover the plurality of lead wires 80.

[0047] According to the above-described configuration, the sealant 9 covers the lead wires 80 between the facing end 91 and the protruding portion 70a, thereby sealing the gap between the lead wires 80 and the tube 90. This prevents uncoated portions of the sealant 9 that may be formed between the lead wires 80 from becoming a path for moisture to penetrate into the motor frame 64. Furthermore, according to the above-described configuration, the facing end 91 is provided with a notch 91c extending in the longitudinal direction of the tube 90. The lead wires 80 extend between the facing end 91 and the opening 70k, widening the gap between them as they move toward the opening 70k. By providing the notch 91c in the facing end 91, the opening of the facing end 91 can be widened to accommodate the lead wires 80. This allows the tip of the facing end 91 to be closer to the opening 70k than when the notch 91c is not provided, thereby reducing the amount of sealant 9 used between the facing end 91 and the protruding portion 70a. Furthermore, by bringing the opposing end 91 close to the protruding portion 70a, at least a portion of the gap between the lead wires 80 can be covered with the tube 90. This makes it possible to prevent uncured sealant 9 from flowing out of the gap between the lead wires 80 during the application process, thereby simplifying the application process of the sealant 9.

[0048] 5, the sealing material 9 of this embodiment covers the multiple lead wires 80 and the protruding portion 70a across the opposing end 91 and the motor frame 64. According to this embodiment, the sealing material 9 can prevent moisture from entering through the boundary between the motor frame 64 and the protruding portion 70a. Furthermore, when the lead wire holding member 70 is made up of multiple members (first member 71 and second member 72) and the boundary between them appears on the surface of the protruding portion 70a, the sealing material 9 can prevent moisture from entering through the boundary.

[0049] 2, the outdoor unit 10 of the present embodiment is the outdoor unit 10 of the refrigeration cycle apparatus 100, and includes a compressor 12, a heat exchanger 13, and a blower 15 that generates an airflow that passes through the heat exchanger 13. The blower 15 has the molded motor 60 described above and a rotor 15b that is rotated by the molded motor 60. According to this configuration, by providing the outdoor unit 10 with a molded motor 60 that has improved waterproofing performance, the reliability of the outdoor unit 10 can be ensured even when the outdoor unit 10 is placed outdoors.

[0050] 6 is a front view of a modified tube 190 that can be used in the molded motor 60 of the first embodiment. The main difference between the tube 190 of this modification and the first embodiment is that it has a plurality of notches 191c. Note that the same components as those of the above-described embodiment are denoted by the same reference numerals in the drawing and will not be described again.

[0051] In this modification, a plurality of notches 191c extending in the length direction of the tube 190 are provided in the opposing end 191 of the tube 190. The notches 191c are arranged side by side at approximately equal intervals on the opposing end 191.

[0052] According to this modification, by providing multiple notches 191c in opposing end 191, the depth of each notch 191c can be reduced compared to when only one notch is provided, which reduces the amount of sealant 109 used to cover notches 191c on the outer periphery of tube 190.

[0053] 7 is a perspective view of a lead wire holding member 270 provided in a molded electric motor 260 according to a second embodiment. Note that the same reference numerals are used in the drawings to designate the same components as those in the above-described embodiment and their modifications, and the description thereof will be omitted.

[0054] Similar to the above-described embodiment, the lead wire holding member 270 includes a block-shaped first member 271 and a second member 272. The first member 271 has a plurality of first grooves 271g, and the second member 272 has a plurality of second grooves 272g. The first member 271 and the second member 272 face each other and contact each other. As a result, the first grooves 271g and the second grooves 272g face each other and overlap to form through holes 270h. That is, the lead wire holding member 270 has a plurality of through holes 270h. The plurality of through holes 270h hold each of the plurality of lead wires 80. The first member 271 and the second member 272 sandwich the plurality of lead wires 80 in the front-rear direction (X-axis direction).

[0055] The lead wire holding member 270 has an embedded portion 270b embedded in the motor frame 64 and a protruding portion 270a protruding from the outer surface of the motor frame 64. The protruding portion 270a has a growing surface 270d facing downward (-Z) and a frame-shaped portion 270f surrounding the growing surface 270d. The growing surface 270d is rectangular when viewed from below. The frame-shaped portion 270f protrudes downward from the growing surface 270d. The frame-shaped portion 270f is provided along the outer edge. Therefore, the frame-shaped portion 270f is rectangular when viewed from below. The growing surface 270d has openings 270k for multiple through holes 270h. The multiple openings 270k are aligned linearly in the left-right direction (Y-axis direction). Multiple lead wires 80 extend from each opening 270k.

[0056] 8 is a front view of a tube 290 provided in a molded motor 260 of this embodiment. As in the above-described embodiment, the tube 290 bundles and covers the multiple lead wires 80 located outside the motor frame 64. The tube 290 has an opposing end 291 that faces the protruding surface 270d of the lead wire holding member 270. In other words, the opposing end 291 is disposed with a gap between it and the multiple openings 270k.

[0057] In this embodiment, a sealant 209 is provided in the region between the opposing end 291 of the tube 290 and the protruding portion 64c of the motor frame 64. The sealant 209 is applied to the target region in an uncured state.

[0058] The sealing material 209 has a first sealing portion 209a, a second sealing portion 209b, a third sealing portion 209c, and a fourth sealing portion 209d. The first sealing portion 209a, the second sealing portion 209b, the third sealing portion 209c, and the fourth sealing portion 209d are connected to one another. The first sealing portion 209a covers the multiple lead wires 80. The first sealing portion 209a seals the gap between the opening 270k and the lead wires 80. The second sealing portion 209b covers at least a portion of the surface of the protruding portion 270a. The second sealing portion 209b seals the gap at the boundary between the first member 271 and the second member 272. The third sealing portion 209c covers the boundary between the protruding portion 270a and the motor frame 64. The third sealing portion 209c seals the gap at the boundary between the motor frame 64 and the lead wire holding member 270. The fourth seal portion 209d covers the tip edge of the opposing end portion 291 of the tube 290. The fourth seal portion 209d, together with the first seal portion 209a, seals the gap between the lead wire 80 and the tube 290.

[0059] According to this embodiment, the sealant 209 blocks water penetration paths into the interior of the motor frame 64 at the first seal portion 209a, the second seal portion 209b, and the third seal portion 209c, thereby protecting the circuit board 63 disposed inside the motor frame 64. This embodiment can provide a molded electric motor 260 with improved waterproof reliability. Also, according to this embodiment, the sealant 209 blocks gaps between the lead wires 80 and the tubes 290 at the first seal portion 209a and the fourth seal portion 209d. This prevents uncoated portions of the sealant 209 that may be formed between multiple lead wires 80 from becoming a path for water penetration.

[0060] According to this embodiment, the lead wire holding member 270 has a frame-shaped portion 270f that surrounds the multiple lead wires 80 and protrudes toward the opposing end 291 of the tube 290. The provision of the frame-shaped portion 270f reduces the distance between the opposing end 291 and the lead wire holding member 270. This reduces the amount of sealant 209 (first seal portion 209a) used between the tip of the opposing end 291 and the lead wire holding member 270. Furthermore, the provision of the frame-shaped portion 270f on the lead wire holding member 270 allows at least a portion of the gaps between the lead wires 80 to be covered with the frame-shaped portion 270f. Therefore, when applying the uncured sealant 209 to the multiple lead wires 80 with the depth direction of the page in FIG. 7 as the direction of gravity, the uncured sealant 209 can be prevented from flowing down to the opposite side from the gaps between the lead wires 80, thereby simplifying the process of applying the sealant 209.

[0061] A window 209w is provided in the second seal portion 209b. The window 209w is formed by leaving a portion of the surface of the lead wire holding member 270 facing forward (+X) uncoated. The lead wire holding member 270 is exposed from the sealant 209 at the portion where the window 209w is provided. That is, the protruding portion 270a is provided with an exposed portion 270e that is exposed from the sealant 209. According to this embodiment, the sealant 209 does not cover the lead wire holding member 270 at the exposed portion 270e, so the amount of sealant 209 used can be reduced. This allows for a reduction in weight and cost of the molded electric motor 260.

[0062] In the embodiment, the exposed portion 270e is provided on a surface of the first member 271 facing forward (+X). That is, the exposed portion 270e is located in a portion different from the boundary between the first member 271 and the second member 272. This makes it possible to prevent moisture from penetrating into the boundary between the first member 271 and the second member 272 via the exposed portion 270e. Note that while FIG. 8 illustrates the exposed portion 270e provided in front (+X) of the lead wire holding member 270, the exposed portion 270e may also be provided in the rear (-X) of the lead wire holding member 270.

[0063] (Summary of Second Embodiment) Similar to the embodiment described above ( FIG. 3 ), a molded electric motor 260 of this embodiment includes a rotor 62, a stator 61, a circuit board 63, a motor frame 64, multiple lead wires 80, a lead wire holder 270, and a tube 290. The rotor 62 rotates around a central axis J. The stator 61 faces the rotor 62 in the radial direction and has a coil 61b. The coil 61b is connected to the circuit board 63. The motor frame 64 is formed by covering at least a portion of the stator 61 and the circuit board 63 with a mold resin 64M. The multiple lead wires 80 are connected to the circuit board 63. The lead wire holder 270 draws the multiple lead wires 80 to the outside of the motor frame 64. The tube 290 bundles and covers the multiple lead wires 80 located outside the motor frame 64. As shown in FIG. 7 , the lead wire holding member 270 has a plurality of through holes 270h that hold the plurality of lead wires 80, an embedded portion 270b that is embedded in the motor frame 64, and a protruding portion 270a that protrudes from the outer surface of the motor frame 64. The protruding portion 270a is provided with a plurality of openings 270k for the plurality of through holes 270h and a frame-shaped portion 270f that surrounds the plurality of openings 270k. The tube 290 has an opposing end portion 291 that is disposed with a gap between it and the plurality of openings 270k. As shown in FIG. 8 , a sealant 209 is provided across the opposing end portion 291 and the frame-shaped portion 270f to cover the plurality of lead wires 80.

[0064] According to the above-described configuration, the sealant 209 covers the lead wires 80 between the opposing end 291 and the protruding portion 270a, thereby sealing the gap between the lead wires 80 and the tube 290. This prevents uncoated portions of the sealant 209 that may be formed between the lead wires 80 from becoming a path for moisture to penetrate into the motor frame 64. Furthermore, according to the above-described configuration, the protruding portion 270a is provided with a frame-shaped portion 270f that surrounds the openings 270k. This reduces the distance between the protruding portion 270a and the opposing end 291, thereby reducing the amount of sealant 209 (first seal portion 209a) used between the opposing end 291 and the protruding portion 270a. Furthermore, because the frame-shaped portion 270f surrounds the lead wires 80, at least a portion of the gap between the lead wires 80 can be covered by the frame-shaped portion 270f. This prevents the uncured sealant 209 from flowing down through the gaps between the lead wires 80 during the application process, thereby simplifying the application process of the sealant 209.

[0065] In the molded motor 260 of this embodiment, the lead wire holding member 270 has a first member 271 and a second member 272 that sandwich the plurality of lead wires 80, as shown in FIG. 7 . As shown in FIG. 8 , the sealant 209 has a first seal portion 209a that covers the plurality of lead wires 80, a second seal portion 209b that covers at least a portion of the surface of the protruding portion 270a, a third seal portion 209c that covers the boundary between the protruding portion 270a and the motor frame 64, and a fourth seal portion 209d that covers the tip edge of the opposing end 291. The protruding portion 270a has an exposed portion 270e that is exposed from the second seal portion 209b. The exposed portion 270e is located in a portion different from the boundary between the first member 271 and the second member 272.

[0066] According to the above-described configuration, the sealing material 209 blocks the path of water intrusion into the interior of the motor frame 64 at the first sealing portion 209a, the second sealing portion 209b, and the third sealing portion 209c, thereby protecting the circuit board 63 disposed inside the motor frame 64. Furthermore, because the second sealing portion 209b does not cover the exposed portion 270e of the lead wire holding member 270, the amount of sealing material 209 used can be reduced. Furthermore, because the exposed portion 270e is located in a portion different from the boundary between the first member 271 and the second member 272, water intrusion into the boundary between the first member 271 and the second member 272 via the exposed portion 270e can be suppressed.

[0067] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the configurations of the above-described embodiments, and the following configurations and methods may also be employed. Furthermore, the configurations and methods described in this specification may be combined as appropriate within the scope of not being mutually inconsistent.

[0068] For example, in the first embodiment described above, the sealant 9 covers the entire protrusion 70a of the lead wire holding member 70, and in the second embodiment described above, the window 209w that exposes the exposed portion 270e of the protrusion 270a is provided in the sealant 109. However, the sealant may form an exposed portion in the protrusion 70a in the first embodiment, or may cover the entire protrusion 270a in the second embodiment.

[0069] The refrigeration cycle device in which the outdoor unit of the present disclosure is provided is not limited to an air conditioner as long as it utilizes a refrigeration cycle in which a refrigerant circulates. The refrigeration cycle device may also be a heat pump water heater or the like.

[0070] 9, 109, 209...sealing material, 9a, 209a...first seal portion, 9b, 209b...second seal portion, 9c, 209c...third seal portion, 9d, 209d...fourth seal portion, 10...outdoor unit, 12...compressor, 13, 22...heat exchanger, 15, 23...blower, 15b...rotor, 60, 260...molded motor, 61...stator, 61b...coil, 62...rotor, 63...circuit board, 64...motor frame, 64M...molded resin , 70, 270... Lead wire holding member, 70a, 270a... Protruding portion, 70b, 270b... Embedded portion, 70h, 270h... Through hole, 70k, 270k... Opening, 71, 271... First member, 72, 272... Second member, 80... Lead wire, 90, 190, 290... Tube, 91, 191, 291... Opposing end portion, 91c, 191c... Cut portion, 100... Refrigeration cycle device, 270e... Exposed portion, 270f... Frame-shaped portion, J... Central axis

Claims

1. a rotor that rotates around a central axis; a stator radially facing the rotor and having a coil; a circuit board to which the coil is connected; a motor frame formed by covering at least a portion of the stator and the circuit board with a molding resin; a plurality of lead wires connected to the circuit board; a lead wire holding member for drawing the plurality of lead wires to the outside of the motor frame; a tube that bundles and covers the plurality of lead wires located outside the motor frame, The lead wire holding member is a plurality of through holes for holding the plurality of lead wires, an embedded portion embedded in the motor frame; a protrusion protruding from an outer surface of the motor frame and having a plurality of openings of the plurality of through holes formed therein; the tube has opposing ends disposed across gaps from the plurality of openings; the plurality of lead wires are held by the lead wire holding member with gaps between them in a direction in which the plurality of openings are linearly aligned, and extend so as to spread in the direction between the opposing ends and the plurality of openings; The opposing end is provided with a notch extending in the length direction of the tube, a sealing material is provided across the opposing end portion and the protruding portion to cover the plurality of lead wires; Molded electric motor.

2. A plurality of the notches are provided on the opposing end portion.

2. The molded electric motor according to claim 1.

3. a rotor that rotates around a central axis; a stator radially facing the rotor and having a coil; a circuit board to which the coil is connected; a motor frame formed by covering at least a portion of the stator and the circuit board with a molding resin; a plurality of lead wires connected to the circuit board; a lead wire holding member for drawing the plurality of lead wires to the outside of the motor frame; a tube that bundles and covers the plurality of lead wires located outside the motor frame, The lead wire holding member is a plurality of through holes for holding the plurality of lead wires, an embedded portion embedded in the motor frame; a protrusion portion that protrudes from an outer surface of the motor frame and is provided with a plurality of openings of the plurality of through holes and a frame-shaped portion that surrounds the plurality of openings, the tube has opposing ends disposed across gaps from the plurality of openings; a sealing material is provided across the opposing end portion and the frame-shaped portion to cover the plurality of lead wires; Molded electric motor.

4. the sealing material covers the plurality of lead wires and the protruding portion across the opposing end portion and the motor frame.

2. The molded electric motor according to claim 1.

5. the lead wire holding member has a first member and a second member that sandwich the plurality of lead wires; a first seal portion that covers the plurality of lead wires; a second seal portion covering at least a portion of the surface of the protrusion; a third seal portion that covers a boundary portion between the protrusion and the motor frame; a fourth seal portion covering a tip edge of the opposing end portion, the protruding portion is provided with an exposed portion that is exposed from the second seal portion, the exposed portion is located at a portion different from a boundary portion between the first member and the second member.

2. The molded electric motor according to claim 1.

6. The sealing material is an acrylic-modified silicone resin.

2. The molded electric motor of claim 1.

7. An outdoor unit of a refrigeration cycle device, a compressor, a heat exchanger, and a blower that generates an airflow that passes through the heat exchanger; The blower is A molded electric motor according to any one of claims 1 to 6; a rotor rotated by the molded electric motor; outdoor unit.