Motor unit, blower, and air conditioner

Abstract

A motor unit according to the present invention comprises: a motor having a rotor that can rotate around the axis of rotation and a stator having a stator core and a coil; a base that supports the motor; and a partition section provided on the base and facing the motor in the radial direction around the axis of rotation of the rotor. The partition section extends so as to face at least a part of the stator core in the radial direction.

Description

Motor unit, blower and air conditioner

[0001] The present disclosure relates to a motor unit, a blower, and an air conditioning apparatus.

[0002] As motors become smaller, efficient dissipation of heat generated by the motor becomes an issue. For example, Patent Document 1 proposes a motor provided with a heat sink.

[0003] JP 2011-252652 A (see FIG. 1)

[0004] However, there is a limit to how much heat can be dissipated by simply providing a heat sink on the motor, so there is a need to use components around the motor to efficiently dissipate the heat from the motor.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to efficiently dissipate heat from a motor by utilizing members surrounding the motor.

[0006] The motor unit of the present disclosure includes a motor having a rotor rotatable about a rotation axis, a stator having a stator core and a coil, a base supporting the motor, and a partition portion provided on the base and facing the motor in a radial direction centered on the rotation axis of the rotor. The partition portion extends so as to face at least a portion of the stator core in the radial direction.

[0007] According to the present disclosure, air passes between the motor and the partition portion on the radially outer side of at least a portion of the stator core, so that heat from the motor can be dissipated efficiently.

[0008] 1 is a perspective view showing a motor unit according to a first embodiment. FIG. 1 is a front view (A) showing the motor unit according to the first embodiment, and a cross-sectional view (B) taken along line 2B-2B shown in FIG. 2(A). FIG. 2 is a front view (A) showing the base and partition of the first embodiment, and a cross-sectional view (B) taken along line 3B-3B shown in FIG. 3(A). FIG. 1 is a cross-sectional view showing an outdoor unit according to the first embodiment. FIG. 1 is a cross-sectional view (A) and (B) showing examples of partitions of different lengths in the motor unit according to the first embodiment. FIG. 1 is a schematic diagram showing the flow of air passing through a motor unit of a comparative example. FIG. 1 is a schematic diagram showing the flow of air passing through the motor unit according to the first embodiment. FIG. 1 is a front view (A) showing another example of the base and partition of the first embodiment, and a cross-sectional view (B) taken along line 9B-9B shown in FIG. 9(A). FIG. 1 is a front view (A) showing a motor unit according to a second embodiment, and a cross-sectional view (B) taken along line 10B-10B shown in FIG. 10(A). 11A is a front view showing a base of embodiment 2, and a cross-sectional view (B) taken along line 11B-11B in FIG. 11A. FIG. 12A is a front view showing a motor unit of embodiment 3, and a cross-sectional view (B) taken along line 12B-12B in FIG. 12A, and a perspective view (C) showing a partition. FIG. 13 is a front view showing a base of embodiment 3. FIG. 14A is a front view showing a motor unit of embodiment 4, and a cross-sectional view (B) taken along line 14B-14B in FIG. 14A, and a perspective view (C) showing a partition. FIG. 14A is a front view showing a motor unit of embodiment 5, and a cross-sectional view (B) taken along line 15B-15B in FIG. 15A, and a perspective view (C) showing a partition. FIG. 14B is a front view showing a motor unit of embodiment 5, and a cross-sectional view (B) taken along line 15B-15B in FIG. 15A, and a perspective view (C) showing a partition. FIG. 15C is a diagram showing an air conditioning device to which the motors of each embodiment and modified example can be applied.

[0009] Each embodiment will be described in detail below with reference to the drawings, but the present disclosure is not limited to these embodiments.

[0010] Embodiment 1. <Configuration of motor unit 1> Fig. 1 is a perspective view showing a motor unit 1 in embodiment 1. Fig. 2(A) is a front view showing the motor unit 1. Fig. 2(B) is a cross-sectional view taken along line 2B-2B shown in Fig. 2(A).

[0011] 1, the motor unit 1 includes a motor M, a partition 5 disposed around the motor M, and a base 4 serving as a support for these components. The motor unit 1 is used, for example, in a blower of an air conditioning device.

[0012] 2B, the motor M has a shaft 10, a rotor 2 fixed to the shaft 10, and a stator 3 surrounding the rotor 2. The central axis of the shaft 10 defines a rotation axis Ax of the rotor 2.

[0013] In the following description, the direction of the rotation axis Ax of the rotor 2, i.e., the central axis of the shaft 10, will be referred to as the "axial direction." The circumferential direction centered on the rotation axis Ax will be referred to as the "circumferential direction." The radial direction centered on the rotation axis Ax will be referred to as the "radial direction."

[0014] The shaft 10 protrudes from the stator 3 to the left in Fig. 2(B) and, for example, an impeller 15 of a blower (Fig. 4) is attached to the protruding portion. Therefore, the protruding side of the shaft 10 is sometimes referred to as the "load side" and the opposite side as the "anti-load side."

[0015] The rotor 2 has a rotor core 21 fixed to the shaft 10 and a plurality of magnets 23 embedded in the rotor core 21. The shaft 10 is fixed by press-fitting or the like into the center hole of the rotor core 21. However, a resin or the like may be provided between the shaft 10 and the rotor core 21.

[0016] The rotor core 21 is an annular member centered on the rotation axis Ax. The rotor core 21 is made by stacking a plurality of laminated elements in the axial direction and integrating them by caulking or the like. The laminated elements are, for example, electromagnetic steel sheets, and have a thickness of 0.1 mm to 0.7 mm.

[0017] The rotor core 21 has a plurality of magnet insertion holes 22. The magnet insertion holes 22 are arranged at equal intervals in the circumferential direction along the outer circumferential surface of the rotor core 21. A magnet 23, which is a permanent magnet, is inserted into each magnet insertion hole 22. The magnet 23 is made of a rare earth magnet containing, for example, neodymium (Nd), iron (Fe), and boron (B).

[0018] The stator 3 has a ring-shaped stator core 31 surrounding the rotor 2, a coil 32 wound around the stator core 31, an insulating part (not shown) provided between the stator core 31 and the coil 32, and a molded resin part 33 as a resin part covering these.

[0019] The stator core 31 is made by stacking multiple electromagnetic steel plates in the axial direction and integrating them by caulking, welding, adhesive, etc. The insulating portion is made of a thermoplastic resin such as PBT (polybutylene terephthalate), and is either molded integrally with the stator core 31 or obtained by assembling a resin molded body to the stator core 31.

[0020] The coil 32 is made of magnet wire and is wound around the stator core 31 via an insulating portion. The stator core 31, the coil 32, and the insulating portion may be collectively referred to as the stator portion 30.

[0021] The molded resin portion 33 is made of a thermosetting resin such as BMC (bulk molding compound). The molded resin portion 33 has an opening 33a on the load side and a bottom 33b on the anti-load side. The rotor 2 is inserted into the hollow portion inside the stator 3 through the opening 33a.

[0022] Alternatively, a circuit board may be disposed on the anti-load side of the stator core 31 and covered with the molded resin part 33. In this case, a terminal connected to the coil 32 is provided on the insulating part of the stator part 30, and the terminal is engaged with a hole in the circuit board and connected by soldering or the like.

[0023] A metal bracket 11 is attached to an opening 33a of the molded resin part 33. A bearing 12 is held by this bracket 11. A bearing 13 is held by a bottom part 33b of the molded resin part 33. The bearings 12 and 13 are coaxial and support the shaft 10 on both axial sides of the rotor 2.

[0024] The molded resin portion 33 has leg portions 35 that protrude radially from its outer circumferential surface. As shown in FIG. 2A , n (n is an integer) leg portions 35 are arranged at equal intervals in the circumferential direction. The number n of the leg portions 35 is, for example, four, but is not limited to four and may be one or more. The leg portions 35 are also referred to as mounting legs. The leg portions 35 are each formed with a through hole 36 as a first through hole through which a screw member 37 ( FIG. 1 ) passes.

[0025] The base 4 is a plate-like member having a front surface 41 as a first surface and a back surface 42 as a second surface. The front surface 41 and the back surface 42 are surfaces perpendicular to the rotation axis Ax. The motor M is fixed to the front surface 41 side of the base 4. The base 4 is formed of, for example, sheet metal.

[0026] An opening 43 is formed in the center of the base 4. The opening 43 reaches from the front surface 41 to the back surface 42 of the base 4. A part of the anti-load side of the motor M, more specifically, the bottom 33b of the molded resin part 33, is located inside the opening 43 of the base 4. A gap is formed between the inner periphery of the opening 43 of the base 4 and the outer periphery of the motor M, i.e., the outer periphery of the stator 3.

[0027] In the base 4, n (n is an integer) screw holes 45 ( FIG. 3A ) are formed at positions corresponding to the through holes 36 of the leg portions 35 of the molded resin portion 33. The number n of screw holes 45 is the same as the number of leg portions 35, which is four in this example. Each screw hole 45 opens to the surface 41 of the base 4.

[0028] The stator 3 is fixed to the base 4 by passing screw members 37 (FIG. 1) as fixing members through the through holes 36 of the leg portions 35 and screwing them into the screw holes 45. In other words, the motor M is fixed to the base 4.

[0029] A partition 5 is provided on the base 4 so as to face the outer peripheral surface of the motor M. The partition 5 faces the outer peripheral surface of the motor M, i.e., the outer peripheral surface of the stator 3, in the radial direction. The partition 5 is a plate-shaped member and is also called a partition plate.

[0030] Here, n (n is an integer) partitions 5 are arranged at intervals in the circumferential direction. The number n of partitions 5 is the same as the number n of legs 35 of the motor M, for example, four. However, the number n of partitions 5 is not limited to four. The legs 35 of the motor M are located between adjacent partitions 5 in the circumferential direction.

[0031] Figure 3(A) is a front view showing the partition 5 and the base 4. Figure 3(B) is a cross-sectional view taken along line 3B-3B in Figure 3(A). The partition 5 is formed integrally with the base 4. Note that the partition 5 may be separate from the base 4 and fixed to the base 4 with a screw member, which will be described later (see Figures 10(A) and (B)).

[0032] As shown in Fig. 3(B), the partition portion 5 extends parallel to the rotation axis Ax from the surface 41 of the base 4. Also, as shown in Fig. 3(A), the partition portion 5 is disposed radially outward of the opening 43 and along the periphery of the opening 43. The above-mentioned screw holes 45 are formed in the base 4 between adjacent partition portions 5.

[0033] The partition 5 has a first surface 51 facing the outer peripheral surface of the motor M (FIG. 2A) and a second surface 52 on the opposite side. Both the first surface 51 and the second surface 52 are curved surfaces, more specifically, cylindrical surfaces centered on the rotation axis Ax. Of the surfaces 51 and 52 of the partition 5, only the first surface 51 facing the motor M may be curved.

[0034] 4 is a cross-sectional view showing the outdoor unit 100 of the air conditioner 200 (FIG. 16) including the motor unit 1. The outdoor unit 100 has a blower 101, a heat exchanger 105, and a housing 102 that surrounds these.

[0035] The blower 101 has a motor unit 1 and an impeller 15 that is rotated by a motor M of the motor unit 1. The impeller 15 is attached to the tip of a shaft 10 of the motor M via a hub 14.

[0036] The housing 102 forms the outer shell of the outdoor unit 100. The housing 102 has an opening 103 on the front side and an opening 104 on the back side. The openings 103 and 104 are sections through which air passes. A grid (not shown) is fitted into the opening 103.

[0037] The motor unit 1 is disposed so that the rotation axis Ax of the shaft 10 faces the front-to-rear direction, the impeller 15 faces the opening 103, and the base 4 faces the opening 104. The base 4 is fixed to the top and bottom plates of the housing 102 by fixing portions 44 provided at the upper and lower ends thereof.

[0038] The heat exchanger 105 has a plurality of fins 105a arranged in the left-right direction and heat transfer tubes 105b that pass through these fins 105a. Rotation of the impeller 15 of the blower 101 generates an air flow that passes axially through the heat exchanger 105. The left-right width of the base 4 of the motor unit 1 is set narrower than the width of the heat exchanger 105 so as not to interfere with the air flow passing through the heat exchanger 105.

[0039] 5A and 5B are diagrams illustrating the length of the partition 5. In Figures 5A and 5B, the distance from the surface 41 of the base 4 to the tip of the partition 5 (i.e., the end farther from the base 4) is defined as the length L1 of the partition 5.

[0040] Furthermore, the distance from the surface 41 of the base 4 to the end 31b of the stator core 31 away from the base 4 (i.e., the far end) is defined as L3. The distance from the surface 41 of the base 4 to the end 31a of the stator core 31 on the base 4 side (i.e., the near end) is defined as L2.

[0041] 5A, the length L1 of the partition 5 is longer than the distance L3 from the surface 41 of the base 4 to the far end 31b of the stator core 31. That is, the partition 5 faces the entire stator core 31 in the radial direction. In other words, the partition 5 faces the outer peripheral surface of the motor M on the radially outer side of the entire stator core 31.

[0042] 5(B), the length L1 of the partition 5 is equal to or less than the distance L3 and is longer than the distance L2 from the base 4 to the proximal end 31a of the stator core 31. That is, the partition 5 faces a portion of the stator core 31 in the radial direction. In other words, the partition 5 faces the outer peripheral surface of the motor M in the radial direction, radially outward of the portion of the stator core 31.

[0043] The length L1 of the partition portion 5 in the first embodiment may satisfy L1 > L3 as shown in Fig. 5(A) or L3 ≥ L1 > L2 as shown in Fig. 5(B). That is, it is sufficient that the partition portion 5 faces at least a portion of the stator core 31 in the radial direction. In other words, it is sufficient that the partition portion 5 faces the outer peripheral surface of the motor M in the radial direction, on the radial outside of at least a portion of the stator core 31.

[0044] <Operation> The operation of the motor unit 1 of embodiment 1 will now be described. In the outdoor unit 100 shown in Figure 4, when the impeller 15 rotates due to the rotation of the motor M, air flows in the axial direction. Air flows in through the opening 104 of the outdoor unit 100, passes through the heat exchanger 105, and further passes through the motor unit 1, and is exhausted from the opening 103.

[0045] 6 is a schematic diagram showing the flow of air passing through a motor unit 1E of the comparative example. The motor unit 1E of the comparative example differs from the motor unit 1 of the first embodiment in that it does not have a partition portion 5.

[0046] The air (indicated by arrow A) that reaches the motor unit 1E from the heat exchanger 105 passes through the gap between the opening 43 of the base 4 and the motor M, and flows forward around the motor M. At this time, the air flowing around the motor M dissipates radially outward (i.e., in a direction away from the outer circumferential surface of the motor M), so it is unable to sufficiently remove heat from the motor M, and the heat dissipation effect of the motor M is low.

[0047] 7 is a schematic diagram showing the flow of air passing through the motor unit 1 of embodiment 1. The motor unit 1 of embodiment 1 has a partition 5 that faces the outer peripheral surface of the motor M. Therefore, air A that reaches the motor unit 1 from the heat exchanger 105 passes through the gap between the opening 43 of the base 4 and the motor M, and then flows forward through the gap between the motor M and the partition 5 as shown by arrow F.

[0048] The air flow around the motor M is prevented from diverging radially outward by the partition 5. Because the air flows in the axial direction along the outer circumferential surface of the motor M, the heat generated in the coil 32 can be efficiently dissipated.

[0049] 7, as shown in FIG. 5A, the length L1 of the partition 5 is longer than the distance L3 from the base 4 to the far end 31b of the stator core 31. In other words, the partition 5 faces the entire stator core 31 in the radial direction. Therefore, air flows in the axial direction along the outer circumferential surface of the motor M, radially outside the entire stator core 31.

[0050] Heat generated in the coils 32 of the motor M is transferred to the outer peripheral surface of the motor M, i.e., the outer peripheral surface of the molded resin portion 33, via the stator core 31. Therefore, air flows in the axial direction along the outer peripheral surface of the motor M, radially outside the entire stator core 31, thereby enabling the heat generated in the coils 32 to be dissipated particularly efficiently.

[0051] However, as shown in Figure 5(B), if the length L1 of the partition 5 is longer than the distance L2 from the base 4 to the proximal end 31a of the stator core 31, air flows in the axial direction along the outer circumferential surface of the motor M, radially outside at least a portion of the stator core 31. Therefore, the heat generated in the coil 32 can be efficiently dissipated.

[0052] 2A, the first surface 51 of the partition 5 facing the motor M has a curved shape (more specifically, an arc shape centered on the rotation axis Ax), so the distance between the motor M and the partition 5 is constant in the circumferential direction. This makes the distribution of airflow between the motor M and the partition 5 uniform in the circumferential direction, allowing the heat of the motor M to be dissipated uniformly.

[0053] 8 is a diagram showing the positional relationship between the motor M and the partition 5 in a plane perpendicular to the rotation axis Ax. The radially outermost position (referred to as the outermost position) Pm of the motor M is indicated by a dashed line. Here, the outermost position Pm of the motor M is the radially outer end of the leg 35 of the motor M.

[0054] 8, the partition 5 is positioned radially inward of the outermost position Pm of the motor M. If the partition 5 were positioned outside the outermost position Pm of the motor M, it would be necessary to enlarge the base 4, which would increase the manufacturing cost of the motor unit 1. Furthermore, if the base 4 were enlarged, it would be more difficult for air that flows along the outside of the base 4 in the width direction to reach the motor unit 1.

[0055] By locating the partition 5 radially inward from the outermost position Pm of the motor M, the base 4 can be made smaller. This reduces manufacturing costs and provides a heat dissipation effect by allowing air that flows along the outside of the base 4 in the width direction to reach the motor unit 1.

[0056] Effect of First Embodiment As described above, the motor unit 1 of the first embodiment includes the motor M having the rotor 2, the stator 3 having the stator core 31 and the coils 32, the base 4 supporting the motor M, and the partition 5 provided on the base 4 and radially facing the motor M. The partition 5 faces at least a portion of the stator core 31 in the radial direction.

[0057] Therefore, air flows axially along the motor M on the radial outside of at least a portion of the stator core 31. This air flow allows the heat transferred from the coil 32 to the outer peripheral surface of the motor M via the stator core 31 to be efficiently dissipated.

[0058] The stator core 31 is located axially on one side of the base 4. If the axial distance from the base 4 to the tip of the partition 5 on the side farther from the base 4 is L1, and the axial distance from the base 4 to the proximal end 31a of the stator core 31 on the side closer to the base 4 is L2, then the distances L1 and L2 satisfy the relationship L1 > L2. Therefore, with a simple configuration, as described above, the partition 5 can be positioned radially opposite the motor M in at least a portion of the radially outer region of the stator core 31.

[0059] Furthermore, by setting the distance L3 from the base 4 to the end of the stator core 31 farther from the base 4 (i.e., the far end 31b) such that L1 > L3, air flows along the motor M in the outer region in the entire radial direction of the stator core 31. This allows the heat of the motor M to be dissipated particularly efficiently.

[0060] Furthermore, since the first surface 51 of the partition section 5 facing the motor M is a concave curved surface, the distance between the motor M and the partition section 5 can be made closer to a constant value in the circumferential direction, allowing the heat from the motor M to be dissipated more efficiently.

[0061] Furthermore, because the partition 5 is positioned radially inward of the outermost position Pm of the motor M, it is possible to reduce the size of the base 4. This reduces manufacturing costs and allows the air that passes outside the base 4 to reach the motor unit 1 and be used for heat dissipation.

[0062] Furthermore, since the partition portion 5 is formed integrally with the base 4, the motor unit 1 can be constructed with a small number of parts.

[0063] In addition, n partition sections 5 are arranged circumferentially, and the legs 35 of the motor M are located between two adjacent partition sections 5, so that the partition sections 5 can be arranged by utilizing the space between the legs 35.

[0064] Furthermore, since the motor M has the molded resin portion 33 as a resin portion that surrounds the stator core 31 from the radial outside, heat generated in the coil 32 can be dissipated from the outer periphery of the molded resin portion 33.

[0065] In addition, since the base 4 has an opening 43 that communicates with the gap between the partition portion 5 and the motor M, the air that reaches the motor unit 1 from the heat exchanger 105 can circulate through the gap between the partition portion 5 and the motor M, thereby dissipating heat from the motor M.

[0066] Modification. Figure 9(A) is a front view showing a modified partition 5A and base 4. Figure 9(B) is a cross-sectional view taken along line 9B-9B in Figure 9(A). While the partition 5 in the first embodiment had a curved shape, as shown in Figures 9(A) and (B), the modified partition 5A is flat. That is, both the first surface 51 and the second surface 52 of the partition 5A are flat.

[0067] In this modification, air A (FIG. 7) reaching the motor unit 1 from the heat exchanger 105 (FIG. 4) passes between the motor M and the partition 5A, thereby enhancing the heat dissipation effect of the motor M. Furthermore, because the partition 5A is flat, it is easy to process, and the manufacturing cost of the motor unit 1 can be reduced.

[0068] Embodiment 2. Figure 10(A) is a front view showing a motor unit 1A according to embodiment 2. Figure 10(B) is a cross-sectional view taken along line 10B-10B in Figure 10(A). In the motor unit 1A according to embodiment 2, the partition portion 6 and the base 4 are formed as separate bodies.

[0069] As shown in Figure 10 (A), in the motor unit 1A of the second embodiment, n (n is an integer) partitions 6 are arranged in the circumferential direction along the outer circumferential surface of the motor M. The number n of partitions 6 is, for example, four, but is not limited to four and may be one or more. The legs 35 of the motor M are arranged between adjacent partitions 6 in the circumferential direction.

[0070] The partition 6 has a wall 61 extending along the outer peripheral surface of the motor M, and a flange 62 formed at the end of the wall 61 on the base 4 side. The partition 6 is made of a material such as sheet metal, but may be made of other materials.

[0071] The axial length of the wall portion 61 is the same as the length L1 (FIGS. 5A and 5B) of the partition portion 5 described in embodiment 1. The wall portion 61 has a curved shape similar to that of the partition portion 5 of embodiment 1, but may also have, for example, a flat plate shape similar to that of the partition portion 5A of the modified example (FIGS. 9A and 9B).

[0072] 10(B), the flange portion 62 protrudes radially outward from the end of the wall portion 61 on the base 4 side. The flange portion 62 has through holes 63 through which screw members 65 for fixing the partition portion 6 to the base 4 are passed.

[0073] The partition 6 is fixed to the base 4 by passing the screw member 65 through the through hole 63 of the flange portion 62 and screwing it into the screw hole 46 of the base 4 .

[0074] The screw member 37 (FIG. 1) for fixing the motor M is also referred to as a first screw member, and the screw member 65 for fixing the partition 6 is also referred to as a second screw member. The through hole 36 in the leg portion 35 of the motor M is also referred to as a first through hole, and the through hole 63 in the flange portion 62 of the partition 6 is also referred to as a second through hole.

[0075] Fig. 11(A) is a front view showing the base 4 of the second embodiment. Fig. 11(B) is a cross-sectional view taken along line 11B-11B shown in Fig. 11(A). As shown in Figs. 11(A) and (B), the base 4 has screw holes 45 for fixing the motor M, as well as screw holes 46 for fixing the partition 6. The screw holes 45, 46 are alternately formed around the opening 43. The screw holes 45 are also referred to as first screw holes, and the screw holes 46 are also referred to as second screw holes.

[0076] In the motor unit 1A of embodiment 2, as in the motor unit 1 of embodiment 1, air flows axially between the partition portion 6 and the motor M, so that heat from the motor M can be dissipated efficiently.

[0077] Except for the points mentioned above, the motor unit 1A of the second embodiment is configured similarly to the motor unit 1 of the first embodiment.

[0078] As described above, in the motor unit 1A of the second embodiment, the partition 6 and the base 4 are formed as separate bodies, so the motor M can be attached to the base 4 before the partition 6 is attached to the base 4. This simplifies the attachment of the motor M to the base 4. Furthermore, the configuration of the base 4 can be simplified.

[0079] Embodiment 3. Figure 12(A) is a front view showing a motor unit 1B of embodiment 3. Figure 12(B) is a cross-sectional view taken along line 12B-12B shown in Figure 12(A). Figure 12(C) is a schematic diagram showing a partition 7 of embodiment 3. In the motor unit 1B of embodiment 3, the partition 7 and the base 4 are formed as separate bodies, and the partition 7 and the motor M are fixed to the base 4 with a common screw member 75.

[0080] 12A, in the motor unit 1B of the third embodiment, n (n is an integer) partitions 7 are arranged in the circumferential direction along the outer circumferential surface of the motor M. The number n of partitions 7 is, for example, four, but is not limited to four and may be one or more. The legs 35 of the motor M are arranged between adjacent partitions 7 in the circumferential direction.

[0081] The partition 7 has a wall 71 extending along the outer circumferential surface of the motor M, and a flange 72 (FIG. 12B) formed on the end of the wall 71 on the base 4 side. The partition 7 is made of a material such as sheet metal, but may be made of other materials.

[0082] The axial length of the wall portion 71 is the same as the length L1 (FIGS. 5A and 5B) of the partition portion 5 described in embodiment 1. The wall portion 71 has a curved shape similar to that of the partition portion 5 in embodiment 1, but may also have a flat plate shape similar to that of the partition portion 5A of the modified example (FIGS. 9A and 9B).

[0083] 12(C), the flange portion 72 is formed to protrude in the circumferential direction from the end of the wall portion 71 on the base 4 side. The flange portion 72 has through holes 73 through which screw members 75 for fixing the partition portion 7 to the base 4 are passed.

[0084] The flange portion 72 is formed to be thicker in the radial direction than the wall portion 71 in order to provide the through hole 73. The through hole 36 of the leg portion 35 of the motor M is also referred to as a first through hole, and the through hole 73 of the flange portion 72 of the partition portion 7 is also referred to as a second through hole.

[0085] 12(B), the legs 35 of the motor M are attached to the base 4 so as to axially overlap the flanges 72 of the partition 7. More specifically, the legs 35 of the motor M are attached to the base 4 so as to sandwich the flanges 72 of the partition 7 between the legs 35 and the base 4.

[0086] The motor M and the partition portion 7 are fixed to the base 4 by passing a screw member 75, which serves as a fixing member, through the through hole 36 of the leg portion 35 and the through hole 73 of the flange portion 72 and screwing it into the screw hole 45 of the base 4.

[0087] Fig. 13 is a front view showing the base 4 of embodiment 3. As shown in Fig. 13, the base 4 is provided with screw holes 45 for fixing the motor M and the partition 7, but is not provided with dedicated screw holes 46 (Figs. 11(A) and 11(B)) for fixing the partition 7 as in embodiment 2.

[0088] In the motor unit 1B of embodiment 3, as in the motor unit 1 of embodiment 1, air flows axially between the partition portion 7 and the motor M, so that heat from the motor M can be dissipated efficiently.

[0089] Except for the points mentioned above, the motor unit 1B of the third embodiment is configured similarly to the motor unit 1 of the first embodiment.

[0090] As described above, in the motor unit 1B of the third embodiment, the partition 7 and the base 4 can be fixed with the common screw member 75, which reduces the number of screw members and the number of screw holes formed in the base 4. This reduces the manufacturing cost of the motor unit 1B.

[0091] Embodiment 4. Figure 14(A) is a front view showing a motor unit 1C of embodiment 4. Figure 14(B) is a cross-sectional view taken along line 14B-14B shown in Figure 14(A). Figure 14(C) is a perspective view showing a partition 8 of embodiment 4. In the motor unit 1C of embodiment 4, the partition 8 and the base 4 are formed separately, and the partition 8 and the motor M are fixed to the base 4 with a common screw member.

[0092] 14A, in the motor unit 1C of the fourth embodiment, n (n is an integer) partitions 8 are arranged in the circumferential direction along the outer circumferential surface of the motor M. The number n of partitions 8 is, for example, four, but is not limited to four and may be one or more. The legs 35 of the motor M are arranged between adjacent partitions 8 in the circumferential direction.

[0093] The partition 8 has a wall 81 extending along the outer peripheral surface of the motor M, and a flange 82 formed at a position spaced a length T from the end of the wall 81 on the base 4 side. The partition 8 is made of a material such as sheet metal, but may be made of other materials.

[0094] The axial length of the wall portion 81 is the same as the length L1 (FIGS. 5A and 5B) of the partition portion 5 described in embodiment 1. The wall portion 81 has a curved shape similar to that of the partition portion 5 in embodiment 1, but may also have a flat plate shape similar to that of the partition portion 5A of the modified example (FIGS. 9A and 9B).

[0095] 14C , the flange portion 82 is formed to protrude circumferentially from a position axially spaced from the axial end of the wall portion 81 by a length T equivalent to the thickness of the leg portion 35 of the motor M. The flange portion 82 has through holes 83 through which screw members 85 for fixing the partition portion 8 to the base 4 pass.

[0096] The flange portion 82 is formed to be thicker in the radial direction than the wall portion 81 in order to provide the through hole 83. The through hole 36 of the leg portion 35 of the motor M is also referred to as a first through hole, and the through hole 83 of the flange portion 82 of the partition portion 8 is also referred to as a second through hole.

[0097] 14(B), the flange portion 82 of the partition portion 8 is attached to the base 4 so as to overlap with the leg portion 35 of the motor M in the axial direction. More specifically, the flange portion 82 of the partition portion 8 is attached to the base 4 so as to sandwich the leg portion 35 of the motor M between the flange portion 82 and the base 4.

[0098] The motor M and the partition 8 are fixed to the base 4 by passing screw members 85 as fixing members through the through holes 83 in the flange 82 and the through holes 36 in the legs 35 and threading them into the screw holes 45 in the base 4. The arrangement of the screw holes 45 in the base 4 is as shown in FIG. 13 of the third embodiment.

[0099] In the motor unit 1C of embodiment 4, as in the motor unit 1 of embodiment 1, air flows axially between the partition portion 8 and the motor M, so that heat from the motor M can be dissipated efficiently.

[0100] Except for the points mentioned above, the motor unit 1C of the fourth embodiment is configured similarly to the motor unit 1 of the first embodiment.

[0101] As described above, in the motor unit 1C of embodiment 4, the partition 8 and the base 4 can be fixed with the common screw member 75, which reduces the number of screw members and the number of screw holes formed in the base 4. This reduces the manufacturing cost of the motor unit 1C. Furthermore, since the motor M can be attached to the base 4 before attaching the partition 8 to the base 4, the installation work of the motor M is simplified.

[0102] Fifth Embodiment Fig. 15(A) is a front view showing a motor unit 1D of a fifth embodiment. Fig. 15(B) is a cross-sectional view taken along line 15B-15B in Fig. 15(C). Fig. 15(C) is a perspective view showing a partition 9 of the fifth embodiment. The motor unit 1D of the fifth embodiment has an annular partition 9 and a base 4.

[0103] As shown in FIG. 15A, in a motor unit 1D of the fifth embodiment, an annular partition portion 9 is provided around the rotation axis Ax so as to surround the motor M.

[0104] The partition 9 has n wall portions 91 arranged circumferentially along the outer circumferential surface of the motor M, and flange portions 92 formed between adjacent wall portions 91. The number n of wall portions 91 is, for example, four, but is not limited to four and may be one or more. The material of the partition 9 is, for example, sheet metal, but may be other materials.

[0105] The axial length of the wall portion 91 is the same as the length L1 of the partition portion 5 described in the first embodiment (FIGS. 5A and 5B).

[0106] 15(C), the flange portion 92 is formed at the axial end of the wall portion 91 and extends to connect adjacent wall portions 91. The flange portion 92 has a through hole 93 through which a screw member 95 for fixing the partition portion 9 to the base 4 passes.

[0107] The flange portion 92 is formed to be thicker in the radial direction than the wall portion 91 in order to provide the through hole 93. The through hole 36 of the leg portion 35 of the motor M is also referred to as a first through hole, and the through hole 93 of the flange portion 92 of the partition portion 9 is also referred to as a second through hole.

[0108] 15(B), the legs 35 of the motor M are attached to the base 4 so as to overlap the flanges 92 of the partition 9. More specifically, the legs 35 of the motor M are attached to the base 4 so as to sandwich the flanges 92 of the partition 9 between the legs 35 and the base 4.

[0109] The motor M and the partition 9 are fixed to the base 4 by passing screw members 95 as fixing members through the through holes 93 in the flange 92 and the through holes 36 in the legs 35 and threading them into the screw holes 45 in the base 4. The arrangement of the screw holes 45 in the base 4 is as shown in FIG. 13 of the third embodiment.

[0110] In the motor unit 1D of embodiment 5, as in the motor unit 1 of embodiment 1, air flows axially between the partition portion 9 and the motor M, so that heat from the motor M can be dissipated efficiently.

[0111] Except for the points mentioned above, the motor unit 1D of the fifth embodiment is configured similarly to the motor unit 1 of the first embodiment.

[0112] The flange portion 92 of the partition portion 9 may be provided so as to sandwich the leg portion 35 of the motor M between itself and the base 4, like the flange portion 82 of the fourth embodiment (FIG. 14B).

[0113] The partition 9 may also be fixed to the base 4 with a screw member separate from the screw member that fixes the motor M. In this case, two types of screw holes 45, 46 (FIG. 11A) may be formed in the base 4 as in the third embodiment. The partition 9 may also be formed integrally with the base 4, as in the partition 5 of the first embodiment.

[0114] As described above, in the motor unit 1D of the fifth embodiment, the partition portion 9 is formed as an integral part, which reduces the number of parts and simplifies the manufacturing process of the motor unit 1D.

[0115] <Air Conditioning Apparatus> Next, an air conditioner to which the motor of each embodiment can be applied will be described. Fig. 16 is a diagram showing the configuration of an air conditioner 200 to which the outdoor unit 100 (Fig. 4) of embodiment 1 is applied. The air conditioner 200 includes the outdoor unit 100, an indoor unit 201, and refrigerant piping 207 connecting these.

[0116] The indoor unit 201 has an indoor blower 202. The indoor blower 202 is, for example, a crossflow fan, and has an impeller 203, a motor 204 that drives the impeller 203, a heat exchanger 205 that is arranged opposite the impeller 203, and a housing 206 that houses these components.

[0117] The outdoor unit 100 has a blower 101, a heat exchanger 105, a compressor 106, and a pressure reducing device (not shown). The blower 101 has a motor unit 1 and an impeller 15. The heat exchanger 105, compressor 106, and pressure reducing device of the outdoor unit 100, and the heat exchanger 205 of the indoor unit 201 are connected by refrigerant piping 207 to form a refrigerant circuit.

[0118] In the outdoor unit 100, the rotation of the motor M of the blower 101 rotates the impeller 15, causing outdoor air to pass through the heat exchanger 105. During heating operation, when the refrigerant compressed by the compressor 106 evaporates in the heat exchanger 105, the air passing through the heat exchanger 105 is cooled by the heat of evaporation being absorbed from it. The cooled air passes through the motor unit 1 by the rotation of the impeller 15 and is released to the outside through the opening 103 (FIG. 4).

[0119] In the indoor unit 201, an impeller 203 rotates due to the rotation of a motor 204 of an indoor blower 202. During heating operation, air heated when the refrigerant condenses in a heat exchanger 205 is blown into the room by the rotation of the impeller 203.

[0120] As explained in the first embodiment, the air that has passed through the heat exchanger 105 passes through the motor M, allowing the heat of the motor M to be dissipated. In particular, the partition 5 (FIG. 1) that faces the motor M allows the heat of the motor M to be dissipated efficiently. This allows the blower 101 to operate stably, and the reliability of the air conditioning apparatus 200 to be improved.

[0121] Note that the motor unit 1 of the first embodiment may be replaced by a motor unit of any of the modified examples, second, third, fourth, or fifth embodiments. Although the motor unit 1 is used here to drive the blower (i.e., outdoor blower) 101 of the outdoor unit 100, it is sufficient to use the motor unit 1 as the drive source for at least one of the outdoor blower 101 and the indoor blower 202.

[0122] Furthermore, the motor unit 1 described in each embodiment can also be mounted on electrical equipment other than the fan of an air conditioner.

[0123] Although the preferred embodiments have been specifically described above, the present disclosure is not limited to the above-described embodiments, and various improvements and modifications can be made.

[0124] DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C, 1D Motor unit, 2 Rotor, 3 Stator, 4 Base, 5, 6, 7, 8, 9 Partition portion, 10 Shaft, 15 Impeller, 21 Rotor core, 23 Magnet, 30 Stator portion, 31 Stator core, 32 Coil, 33 Molded resin portion (resin portion), 35 Leg portion (mounting portion), 36 Through hole (first through hole), 41 Front surface (first surface), 42 Back surface (second surface), 43 Opening, 45 Screw hole (first screw hole), 46 Screw hole (second screw hole), 51 First surface, 52 Second surface, 61, 71, 81, 91 Wall portion, 62, 72, 82, 92 Flange portion, 63, 73, 83, 93 Through holes (second through holes), 65, 75, 85, 95 Screw members, 100 Outdoor unit, 101 Fan (outdoor fan), 102 Housing, 103, 104 Opening, 105 Heat exchanger, 200 Air conditioner, 201 Indoor unit, 202 Indoor fan.

Claims

1. A motor having a rotor rotatable about a rotation axis, and a stator having a stator core and a coil, a base for supporting the motor, n (n is an integer) partition portions provided on the base and facing the motor in a radial direction centered on the rotation axis of the rotor, and having, the n partition portions are arranged in a circumferential direction centered on the rotation axis and extend so as to face at least a part of the stator core in the radial direction motor unit.

2. The stator core is located on one side of the base in the axial direction of the rotation axis, a distance L1 in the axial direction from the base to the end of the partition portion on the side far from the base, and a distance L2 in the axial direction from the base to the end of the stator core on the side close to the base satisfy L1 > L2 The motor unit according to claim 1.

3. A distance L1 in the axial direction from the base to the end of the partition portion on the side far from the base, and a distance L3 in the axial direction from the base to the end of the stator core on the side far from the base satisfy L1 > L3 The motor unit according to claim 2.

4. The partition portion has a concave curved surface on the side facing the motor The motor unit according to any one of claims 1 to 3.

5. The motor has legs attached to the base, among the n partition portions, the legs are located between two adjacent partition portions The motor unit according to any one of claims 1 to 3.

6. A motor having a rotor rotatable about a rotation axis, and a stator having a stator core and a coil, a base for supporting the motor, a partition portion provided on the base and facing the motor in a radial direction centered on the rotation axis of the rotor, and having, the partition portion extends so as to face at least a part of the stator core in the radial direction, the partition portion is arranged inside the radial direction rather than the outermost end portion in the radial direction of the motor motor unit.

7. The partition portion is formed in an annular shape so as to surround the motor from the outside in the radial direction The motor unit according to any one of claims 6.

8. The partition portion and the base are integrally formed The motor unit according to any one of claims 1 to 3 and claim 6.

9. The partition portion and the base are separate bodies. The motor unit according to any one of claims 1 to 3 and claim 6.

10. The motor has a through hole for passing a first screw member. The partition portion has a through hole for passing a second screw member. The base has a first screw hole engaged with the first screw member and a second screw hole engaged with the second screw member. The motor unit according to claim 9.

11. The motor has a first through hole for passing a screw member. The partition portion has a second through hole for passing the screw member. The base has a screw hole engaged with the screw member. The motor unit according to claim 9.

12. The motor has a leg portion formed with the first through hole. The partition portion has a flange portion formed with the second through hole. The flange portion is attached between the leg portion and the base. The motor unit according to claim 11.

13. The motor has a leg portion formed with the first through hole. The partition portion has a flange portion formed with the second through hole. The leg portion is attached between the flange portion and the base. The motor unit according to claim 11.

14. The motor has a resin portion that surrounds the stator core from the outside in the radial direction. The motor unit according to any one of claims 1 to 3 and claim 6.

15. The base has an opening that communicates with a gap between the partition portion and the motor. The motor unit according to any one of claims 1 to 3 and claim 6.

16. The motor unit according to any one of claims 1 to 3 and claim 6, and An impeller rotated by the motor of the motor unit A blower comprising.

17. An outdoor unit and an indoor unit connected to the outdoor unit, At least one of the outdoor unit and the indoor unit Has the blower according to claim 16 An air conditioner.

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