Motor units, blowers, and air conditioning systems

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

[Technical Field]

[0001] The present disclosure relates to a motor unit, a blower, and an air conditioner. [Background Art]

[0002] With the downsizing of motors, efficiently dissipating heat generated by the motor has become an issue. For example, Patent Document 1 proposes a motor provided with a heat dissipation plate. [Prior Art Literature] [Patent Literature]

[0003] [Patent Document 1] Japanese Patent Laid-Open No.2011-252652 (see FIG. 1) [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] However, merely providing a heat dissipation plate on the motor has a limit to the improvement of heat dissipation efficiency. Therefore, it is required to efficiently dissipate heat of the motor by using members surrounding the motor.

[0005] The present disclosure has been made to solve the above problem, and an object thereof is to efficiently dissipate heat of a motor by using members surrounding the motor. [Means for Solving the Problem]

[0006] The motor unit of the present disclosure comprises: a motor including a rotor rotatable about a rotating shaft, and a stator having a stator core and a coil; a base that supports the motor; and a partition provided on the base and facing the motor in a radial direction centered on the rotating shaft of the rotor n (where n is an integer) . The n partition sections are arranged in the circumferential direction around the axis of rotation, and The partition extends so as to face at least a part of the stator core in the radial direction. The motor unit of this disclosure also includes a motor having a rotor rotatable about a rotation axis and a stator having a stator core and coils; a base supporting the motor; and a partition provided on the base and facing the motor in the radial direction about the rotation axis of the rotor. The partition extends radially opposite to at least a portion of the stator core. The partition is positioned radially inward from the outermost radial end of the motor. [Effect of the Invention]

[0007] According to this disclosure, air passes between the motor and the partition on the radially outer side of at least a portion of the stator core, thereby enabling efficient heat dissipation from the motor. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing the motor unit of Embodiment 1. [Figure 2] Figure 2(A) shows a front view of the motor unit of Embodiment 1, and Figure 2(A) shows a cross-sectional view of the line segment 2B-2B. [Figure 3] Figure 3(A) shows a front view (A) of the base and partition section of Embodiment 1, and Figure 3(A) shows a cross-sectional view (B) of the line segment 3B-3B. [Figure 4] This is a cross-sectional view showing the outdoor unit of Embodiment 1. [Figure 5] These are cross-sectional views (A) and (B) showing examples of partition sections of different lengths in the motor unit of Embodiment 1. [Figure 6] This is a schematic diagram showing the airflow through the motor unit of the comparative example. [Figure 7] This is a schematic diagram showing the airflow passing through the motor unit of Embodiment 1. [Figure 8] This is a front view showing the motor unit of Embodiment 1. [Figure 9] Figure 9(A) shows a front view (A) illustrating another example of the base and partition section of Embodiment 1, and Figure 9(A) shows a cross-sectional view (B) along the line segment 9B-9B. [Figure 10] Figure 10(A) shows a front view (A) of the motor unit of Embodiment 2, and Figure 10(A) shows a cross-sectional view (B) of the line segment 10B-10B. [Figure 11] Figure 11(A) shows a front view (A) of the base of Embodiment 2, and Figure 11(A) shows a cross-sectional view (B) of the line segment 11B-11B. [Figure 12]It is a front view (A) showing the motor unit according to Embodiment 3, a cross-sectional view (B) along line segment 12B-12B shown in FIG. 12(A), and a perspective view (C) showing the partition part. [Figure 13] It is a front view showing the base according to Embodiment 3. [Figure 14] It is a front view (A) showing the motor unit according to Embodiment 4, a cross-sectional view (B) along line segment 14B-14B shown in FIG. 14(A), and a perspective view (C) showing the partition part. [Figure 15] It is a front view (A) showing the motor unit according to Embodiment 5, a cross-sectional view (B) along line segment 15B-15B shown in FIG. 15(A), and a perspective view (C) showing the partition part. [Figure 16] It is a diagram showing an air conditioner to which the motor of each embodiment and modified example can be applied. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, each embodiment will be described in detail with reference to the drawings. The present disclosure is not limited by these embodiments.

[0010] Embodiment 1. <Configuration of Motor Unit 1> FIG. 1 is a perspective view showing the motor unit 1 according to Embodiment 1. FIG. 2(A) is a front view showing the motor unit 1. FIG. 2(B) is a cross-sectional view along line segment 2B-2B shown in FIG. 2(A).

[0011] As shown in FIG. 1, the motor unit 1 includes a motor M, a partition part 5 arranged around the motor M, and a base 4 as a support body that supports these components. The motor unit 1 is used, for example, in a blower of an air conditioner.

[0012] As shown in FIG. 2(B), the motor M includes 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 the rotation axis Ax of the rotor 2.

[0013] In the following explanation, the direction of the rotation axis Ax of rotor 2, i.e., the central axis of 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 Figure 2(B), and a blower impeller 15 (Figure 4) is attached to this protruding portion. For this reason, the protruding side of the shaft 10 is sometimes referred to as the "load side," and the opposite side as the "non-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 to the central hole of the rotor core 21 by press-fitting or the like. 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 formed by laminating multiple laminated elements in the axial direction and integrating them by crimping or the like. The laminated elements are, for example, electrical steel sheets, with 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 surface of the rotor core 21. A permanent magnet, a magnet 23, is inserted into each magnet insertion hole 22. The magnet 23 is composed of rare earth magnets, such as neodymium (Nd), iron (Fe), and boron (B).

[0018] The stator 3 includes an annular stator core 31 surrounding the rotor 2, a coil 32 wound around the stator core 31, an insulating portion (not shown) provided between the stator core 31 and the coil 32, and a molded resin portion 33 that covers these.

[0019] The stator core 31 is formed by laminating multiple electromagnetic steel sheets in the axial direction and integrating them by crimping, welding, bonding, etc. The insulating part is made of a thermoplastic resin such as PBT (polybutylene terephthalate) and is obtained by integrally molding it with the stator core 31 or 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 section. The stator core 31, coil 32, and insulating section together are sometimes referred to as the stator section 30.

[0021] The molded resin portion 33 is formed from 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 portion 33b on the non-load side. The rotor 2 is inserted into the hollow portion inside the stator 3 through the opening 33a.

[0022] Furthermore, the circuit board is placed on the non-load side of the stator core 31 and covered with the molded resin part 33. too That's good. In this case, a terminal connected to the coil 32 is provided on the insulating part of the stator section 30, and the terminal is engaged with a hole in the circuit board and connected with solder or the like.

[0023] A metal bracket 11 is attached to the opening 33a of the molded resin part 33. A bearing 12 is held in this bracket 11. A bearing 13 is held in the 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 legs 35 that protrude radially from its outer circumferential surface. As shown in Figure 2(A), n (where n is an integer) legs 35 are arranged at equal intervals in the circumferential direction. The number of legs 35, n, is for example four, but is not limited to four; one or more are acceptable. The legs 35 are also called mounting legs. The legs 35 have through holes 36 formed therein, which serve as first through holes through which a screw member 37 (Figure 1) passes.

[0025] The base 4 is a plate-like member having a surface 41 as a first surface and a back surface 42 as a second surface. The surface 41 and back surface 42 are surfaces perpendicular to the rotation axis Ax. The motor M is fixed to the 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 extends from the surface 41 to the back surface 42 of the base 4. Inside the opening 43 of the base 4 lies a portion of the motor M on the non-load side, more specifically the bottom 33b of the molded resin portion 33. A gap is formed between the inner circumference of the opening 43 of the base 4 and the outer surface of the motor M, i.e., the outer surface of the stator 3.

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

[0028] The stator 3 is fixed to the base 4 by screwing the screw member 37 (Figure 1), which serves as a fixing member, through the through hole 36 of the leg portion 35 and into the screw hole 45. In other words, the motor M is fixed to the base 4.

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

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

[0031] Figure 3(A) is a front view showing the partition section 5 and the base 4. Figure 3(B) is a cross-sectional view along the line segment 3B-3B shown in Figure 3(A). The partition section 5 is formed integrally with the base 4. Alternatively, the partition section 5 may be made separate from the base 4 and fixed to the base 4 with screw members, but this will be described later (see Figures 10(A) and (B)).

[0032] As shown in Figure 3(B), the partition portion 5 extends from the surface 41 of the base 4 parallel to the rotation axis Ax. Also, as shown in Figure 3(A), the partition portion 5 is positioned radially outward of the opening 43, along the perimeter of the opening 43. In the base 4, the aforementioned screw holes 45 are formed between adjacent partition portions 5.

[0033] The partition section 5 has a first surface 51 facing the outer circumferential surface of the motor M (Figure 2(A)) 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 section 5, only the first surface 51 facing the motor M may be a curved surface.

[0034] Figure 4 is a cross-sectional view showing the outdoor unit 100 of an air conditioning system 200 (Figure 16), including the motor unit 1. The outdoor unit 100 has a blower 101, a heat exchanger 105, and a housing 102 surrounding them.

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

[0036] The housing 102 forms the outer casing of the outdoor unit 100. The housing 102 has an opening 103 on the front and an opening 104 on the rear. Openings 103 and 104 are for allowing air to pass through. A grid (not shown) is fitted into opening 103.

[0037] The motor unit 1 is positioned such that the rotation axis Ax of the shaft 10 faces the front-to-back 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 parts 44 provided at its upper and lower ends.

[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. The rotation of the impeller 15 of the blower 101 generates an airflow that passes through the heat exchanger 105 in the axial direction. To avoid obstructing the airflow through the heat exchanger 105, the left-right width of the base 4 of the motor unit 1 is set to be narrower than the width of the heat exchanger 105.

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

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

[0041] In the example shown in Figure 5(A), 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 radially. In other words, the partition 5 faces the outer circumferential surface of the motor M radially on the radially outer side of the entire stator core 31.

[0042] In the example shown in Figure 5(B), the length L1 of the partition 5 is less than or equal to the distance L3 mentioned above, and is longer than the distance L2 from the base 4 to the near end 31a of the stator core 31. In other words, the partition 5 is radially opposite to a part of the stator core 31. To put it another way, the partition 5 is radially opposite to the outer circumferential surface of the motor M on the radially outer side of a part of the stator core 31.

[0043] The length L1 of the partition portion 5 in Embodiment 1 may satisfy L1 > L3 as shown in Figure 5(A), or it may satisfy L3 ≥ L1 > L2 as shown in Figure 5(B). In other words, the partition portion 5 only needs to be radially opposite to at least a part of the stator core 31. To put it another way, the partition portion 5 only needs to be radially opposite to the outer circumferential surface of the motor M on the radially outer side of at least a part of the stator core 31.

[0044] <effect> The operation of the motor unit 1 in Embodiment 1 will now be explained. In the outdoor unit 100 shown in Figure 4, when the impeller 15 rotates due to the rotation of the motor M, an axial airflow is generated. Air flows in from the opening 104 of the outdoor unit 100, passes through the heat exchanger 105, then passes through the motor unit 1, and is exhausted from the opening 103.

[0045] Figure 6 is a schematic diagram showing the airflow through the motor unit 1E of the comparative example. The motor unit 1E of the comparative example differs from the motor unit 1 of Embodiment 1 in that it does not have a partition portion 5.

[0046] The air that reaches the motor unit 1E from the heat exchanger 105 (indicated by arrow A) 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., away from the outer surface of the motor M), so it cannot sufficiently remove heat from the motor M, and the heat dissipation effect of the motor M is low.

[0047] Figure 7 is a schematic diagram showing the airflow through the motor unit 1 of Embodiment 1. The motor unit 1 of Embodiment 1 has a partition 5 facing the outer surface of the motor M. Therefore, the 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 space between the motor M and the partition 5, as indicated by arrow F.

[0048] The airflow around the motor M is prevented from diverting radially outward by the partition 5. Since air flows axially along the outer surface of the motor M, the heat generated by the coil 32 can be efficiently dissipated.

[0049] Furthermore, in the example shown in Figure 7, as shown in Figure 5(A), 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. That is, the partition 5 faces the entire stator core 31 radially. Therefore, air flows axially along the outer circumferential surface of the motor M on the radially outer side of the entire stator core 31.

[0050] The heat generated in the coil 32 of the motor M is transferred to the outer surface of the motor M, i.e., the outer surface of the molded resin part 33, via the stator core 31. Therefore, air flows axially along the outer surface of the motor M on the radially outer side of the stator core 31, which allows for particularly efficient heat dissipation from the coil 32.

[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 near end 31a of the stator core 31, air will flow axially along the outer surface of the motor M on the radially outer side of at least a portion of the stator core 31. Therefore, the heat generated in the coil 32 can be efficiently dissipated.

[0052] Furthermore, as shown in Figure 2(A), 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 that the distance between the motor M and the partition 5 is constant in the circumferential direction. As a result, the circumferential distribution of airflow between the motor M and the partition 5 becomes uniform, and the heat from the motor M can be dissipated uniformly.

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

[0054] As shown in Figure 8, the partition 5 is positioned radially inward from 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 increase the size of the base 4, which would increase the manufacturing cost of the motor unit 1. In addition, increasing the size of the base 4 would make it more difficult for the air flowing along the outside of the base 4 in the width direction to reach the motor unit 1.

[0055] By positioning the partition section 5 radially inward from the outermost position Pm of the motor M, the base 4 can be made smaller. This reduces manufacturing costs and also provides a heat dissipation effect as air flowing along the outside of the base 4 reaches the motor unit 1.

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

[0057] Therefore, air flows axially along the motor M on the radially outer side of at least a portion of the stator core 31. This airflow allows for efficient heat dissipation from the coil 32 through the stator core 31 to the outer surface of the motor M.

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

[0059] Furthermore, since the distance L3 from the base 4 to the far end of the stator core 31 (i.e., the far end 31b) satisfies L1 > L3, air flows along the motor M in the radially outer region of the stator core 31. As a result, the heat from the motor M can be dissipated particularly efficiently.

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

[0061] Furthermore, since the partition section 5 is positioned radially inward from the outermost position Pm of the motor M, the size of the base 4 can be reduced. This reduces manufacturing costs and allows air that has passed outside the base 4 to reach the motor unit 1 and be used for heat dissipation.

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

[0063] Furthermore, since n partition sections 5 are arranged in the circumferential direction, and the legs 35 of the motor M are located between two adjacent partition sections 5, the partition sections 5 can be arranged by utilizing the space between the legs 35.

[0064] Furthermore, since the motor M has a molded resin portion 33 that surrounds the stator core 31 from the radially outer side, the heat generated by the coil 32 can be dissipated from the outer circumference of the molded resin portion 33.

[0065] Furthermore, since the base 4 has an opening 43 that communicates with the gap between the partition 5 and the motor M, the air that has reached the motor unit 1 from the heat exchanger 105 can be circulated through the gap between the partition 5 and the motor M, allowing the heat from the motor M to be dissipated.

[0066] Variant expression. Figure 9(A) is a front view showing the modified partition 5A and base 4. Figure 9(B) is a cross-sectional view along the line segment 9B-9B shown in Figure 9(A). While the partition 5 of Embodiment 1 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 planar.

[0067] In this modified example, the air A (Figure 7) that reaches the motor unit 1 from the heat exchanger 105 (Figure 4) passes between the motor M and the partition 5A, thereby enhancing the heat dissipation effect of the motor M. Furthermore, since the partition 5A is flat, it is easy to process, which reduces the manufacturing cost of the motor unit 1.

[0068] Embodiment 2. Figure 10(A) is a front view showing the motor unit 1A of Embodiment 2. Figure 10(B) is a cross-sectional view along the line segment 10B-10B shown in Figure 10(A). In the motor unit 1A of Embodiment 2, the partition 6 and the base 4 are formed as separate components.

[0069] As shown in Figure 10(A), in the motor unit 1A of Embodiment 2, n (where n is an integer) partition sections 6 are arranged circumferentially along the outer surface of the motor M. The number of partition sections 6, n, is, for example, four, but is not limited to four; one or more are acceptable. The legs 35 of the motor M are arranged between adjacent partition sections 6 in the circumferential direction.

[0070] The partition 6 has a wall portion 61 that extends along the outer circumferential surface of the motor M, and a flange portion 62 formed at the end of the wall portion 61 on the base 4 side. The material of the partition 6 is, for example, sheet metal, but it may be made of other materials.

[0071] The axial length of the wall portion 61 is the same as the length L1 of the partition portion 5 described in Embodiment 1 (Figures 5(A), (B)). In addition, although the wall portion 61 has a curved shape similar to the partition portion 5 in Embodiment 1, it may also have a flat plate shape similar to the modified partition portion 5A (Figures 9(A), (B)).

[0072] As shown in Figure 10(B), the flange portion 62 protrudes radially outward from the base 4 side end of the wall portion 61. The flange portion 62 has a through hole 63 through which a screw member 65 for fixing the partition portion 6 to the base 4 passes.

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

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

[0075] Figure 11(A) is a front view showing the base 4 of Embodiment 2. Figure 11(B) is a cross-sectional view along the line segment 11B-11B shown in Figure 11(A). As shown in Figures 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 and 46 are formed alternately around the opening 43. The screw holes 45 are also referred to as the first screw holes, and the screw holes 46 are also referred to as the second screw holes.

[0076] In the motor unit 1A of Embodiment 2, as with the motor unit 1 of Embodiment 1, air flows axially between the partition 6 and the motor M, allowing for efficient heat dissipation from the motor M.

[0077] Except for the points mentioned above, the motor unit 1A of Embodiment 2 is configured in the same way as the motor unit 1 of Embodiment 1.

[0078] As described above, in the motor unit 1A of Embodiment 2, the partition 6 and the base 4 are formed as separate parts, so the motor M can be attached to the base 4 before attaching the partition 6 to the base 4. This simplifies the process of attaching the motor M to the base 4. It also simplifies the configuration of the base 4.

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

[0080] As shown in Figure 12(A), in the motor unit 1B of Embodiment 3, n (where n is an integer) partition sections 7 are arranged circumferentially along the outer surface of the motor M. The number of partition sections 7, n, is, for example, four, but is not limited to four; one or more are acceptable. The legs 35 of the motor M are arranged between adjacent partition sections 7 in the circumferential direction.

[0081] The partition section 7 has a wall section 71 that extends along the outer circumferential surface of the motor M, and a flange section 72 (Figure 12(B)) formed at the base 4 side end of the wall section 71. The material of the partition section 7 is, for example, sheet metal, but it may be made of other materials.

[0082] The axial length of the wall portion 71 is the same as the length L1 of the partition portion 5 described in Embodiment 1 (Figures 5(A), (B)). In addition, although the wall portion 71 has a curved shape similar to the partition portion 5 in Embodiment 1, it may also have a flat plate shape similar to the modified partition portion 5A (Figures 9(A), (B)).

[0083] As shown in Figure 12(C), the flange portion 72 is formed to protrude circumferentially from the base 4 side end of the wall portion 71. The flange portion 72 has a through hole 73 through which a screw member 75 for fixing the partition portion 7 to the base 4 passes.

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

[0085] As shown in Figure 12(B), the legs 35 of the motor M are attached to the base 4 so as to overlap the flange portion 72 of the partition portion 7 in the axial direction. More specifically, the legs 35 of the motor M are attached to the base 4 so as to sandwich the flange portion 72 of the partition portion 7 between them.

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

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

[0088] In the motor unit 1B of Embodiment 3, as with the motor unit 1 of Embodiment 1, air flows axially between the partition 7 and the motor M, allowing for efficient heat dissipation from the motor M.

[0089] Except for the points mentioned above, the motor unit 1B of Embodiment 3 is configured in the same way as the motor unit 1 of Embodiment 1.

[0090] As described above, in the motor unit 1B of Embodiment 3, the partition 7 and the base 4 can be fixed together with a common screw member 75, thus reducing the number of screw members and the number of screw holes formed in the base 4. Therefore, the manufacturing cost of the motor unit 1B can be reduced.

[0091] Embodiment 4. Figure 14(A) is a front view showing the motor unit 1C of Embodiment 4. Figure 14(B) is a cross-sectional view along the line segment 14B-14B shown in Figure 14(A). Figure 14(C) is a perspective view showing the 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] As shown in Figure 14(A), in the motor unit 1C of Embodiment 4, n (where n is an integer) partition sections 8 are arranged circumferentially along the outer surface of the motor M. The number of partition sections 8 is, for example, four, but is not limited to four; one or more are acceptable. The legs 35 of the motor M are arranged between adjacent partition sections 8 in the circumferential direction.

[0093] The partition portion 8 has a wall portion 81 that extends along the outer circumferential surface of the motor M, and a flange portion 82 formed at a distance T from the base 4 side end of the wall portion 81. The material of the partition portion 8 is, for example, sheet metal, but it may be made of other materials.

[0094] The axial length of the wall portion 81 is the same as the length L1 of the partition portion 5 described in Embodiment 1 (Figures 5(A), (B)). In addition, although the wall portion 81 has a curved shape similar to the partition portion 5 in Embodiment 1, it may also have a flat plate shape similar to the modified partition portion 5A (Figures 9(A), (B)).

[0095] As shown in Figure 14(C), the flange portion 82 is formed to protrude circumferentially from a position axially separated from the axial end of the wall portion 81 by a length T corresponding to the thickness of the leg portion 35 of the motor M. The flange portion 82 has a through hole 83 through which a screw member 85 for fixing the partition portion 8 to the base 4 passes.

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

[0097] As shown in Figure 14(B), the flange portion 82 of the partition portion 8 is attached to the base 4 so as to overlap 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 itself and the base 4.

[0098] The motor M and the partition 8 are fixed to the base 4 by screwing the screw member 85, which serves as a fixing member, through the through hole 83 in the flange portion 82 and the through hole 36 in the leg portion 35, and then screwing it into the screw hole 45 of the base 4. The arrangement of the screw holes 45 in the base 4 is as shown in Figure 13 of Embodiment 3.

[0099] In the motor unit 1C of Embodiment 4, as with the motor unit 1 of Embodiment 1, air flows axially between the partition 8 and the motor M, allowing for efficient heat dissipation from the motor M.

[0100] Except for the points mentioned above, the motor unit 1C of Embodiment 4 is configured in the same way as the motor unit 1 of Embodiment 1.

[0101] As described above, in the motor unit 1C of Embodiment 4, the partition 8 and the base 4 can be fixed with a common screw member 75, thus reducing the number of screw members and the number of screw holes formed in the base 4. Therefore, the manufacturing cost of the motor unit 1C can be reduced. In addition, since the motor M can be attached to the base 4 before the partition 8 is attached to the base 4, the installation work of the motor M is simplified.

[0102] Embodiment 5. Figure 15(A) is a front view showing the motor unit 1D of Embodiment 5. Figure 15(B) is a cross-sectional view along the line segment 15B-15B shown in Figure 15(C). Figure 15(C) is a perspective view showing the partition 9 of Embodiment 5. The motor unit 1D of Embodiment 5 has an annular partition 9 and a base 4.

[0103] As shown in Figure 15(A), in the motor unit 1D of Embodiment 5, an annular partition 9 centered on the rotation axis Ax is provided to surround the motor M.

[0104] The partition section 9 has n wall sections 91 arranged circumferentially along the outer surface of the motor M, and flange sections 92 formed between adjacent wall sections 91. The number of wall sections 91 is, for example, four, but is not limited to four; it can be one or more. The material of the partition section 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 Embodiment 1 (Figures 5(A), (B)).

[0106] As shown in Figure 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 radially thicker than the wall portion 91 in order to provide a through hole 93. The through hole 36 in the leg portion 35 of the motor M is also referred to as the first through hole, and the through hole 93 in the flange portion 92 of the partition portion 9 is also referred to as the second through hole.

[0108] As shown in Figure 15(B), the legs 35 of the motor M are attached to the base 4 so as to overlap with the flange portion 92 of the partition portion 9. More specifically, the legs 35 of the motor M are attached to the base 4 so as to sandwich the flange portion 92 of the partition portion 9 between them.

[0109] The motor M and the partition 9 are fixed to the base 4 by screwing the screw member 95, which serves as a fixing member, through the through hole 93 in the flange portion 92 and the through hole 36 in the leg portion 35, and then screwing it into the screw hole 45 of the base 4. The arrangement of the screw holes 45 in the base 4 is as shown in Figure 13 of Embodiment 3.

[0110] In the motor unit 1D of Embodiment 5, as with the motor unit 1 of Embodiment 1, air flows axially between the partition 9 and the motor M, allowing for efficient heat dissipation from the motor M.

[0111] Except for the points mentioned above, the motor unit 1D of Embodiment 5 is configured in the same way as the motor unit 1 of Embodiment 1.

[0112] Furthermore, 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 it and the base 4, as shown in the flange portion 82 of Embodiment 4 (Figure 14(B)).

[0113] Furthermore, the partition 9 may 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 and 46 (Figure 11(A)) should be formed in the base 4 as in Embodiment 3. Alternatively, the partition 9 may be formed integrally with the base 4, as in the partition 5 of Embodiment 1.

[0114] As described above, in the motor unit 1D of Embodiment 5, the partition portion 9 is formed integrally, which reduces the number of parts and simplifies the manufacturing process of the motor unit 1D.

[0115] <Air conditioning system> Next, we will describe the air conditioning systems to which the motors of each embodiment can be applied. Figure 16 is a diagram showing the configuration of an air conditioning system 200 to which the outdoor unit 100 (Figure 4) of Embodiment 1 is applied. The air conditioning system 200 comprises an outdoor unit 100, an indoor unit 201, and refrigerant piping 207 connecting them.

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

[0117] The outdoor unit 100 includes a blower 101, a heat exchanger 105, a compressor 106, and a pressure reducing device (not shown). The blower 101 includes 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 causes the impeller 15 to rotate, thereby causing the 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 as heat of vaporization is removed. The cooled air passes through the motor unit 1 due to the rotation of the impeller 15 and is released to the outside through the opening 103 (Figure 4).

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

[0120] As described in Embodiment 1, the air that has passed through the heat exchanger 105 also passes through the motor M, allowing heat from the motor M to be dissipated. In particular, since a partition 5 (Figure 1) is provided facing the motor M, heat from the motor M can be dissipated efficiently. This enables stable operation of the blower 101 and improves the reliability of the air conditioning system 200.

[0121] In addition, instead of the motor unit 1 of Embodiment 1, a modified motor unit of Embodiments 2, 3, 4, or 5 may be used. Furthermore, 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 drive sources for 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 blower of an air conditioning system.

[0123] Although preferred embodiments have been described in detail above, this disclosure is not limited to the embodiments described above, and various improvements or modifications can be made. [Explanation of Symbols]

[0124] 1,1A,1B,1C,1D Motor unit, 2 Rotor, 3 Stator, 4 Base, 5,6,7,8,9 Partition section, 10 Shaft, 15 Impeller, 21 Rotor core, 23 Magnet, 30 Stator section, 31 Stator core, 32 Coil, 33 Molded resin section (resin section), 35 Leg section (mounting section), 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 section, 62,72,82,92 Flange section, 63, 73, 83, 93 Through holes (second through holes), 65, 75, 85, 95 Screw members, 100 Outdoor unit, 101 Blower (outdoor blower), 102 Housing, 103, 104 Openings, 105 Heat exchanger, 200 Air conditioning system, 201 Indoor unit, 202 Indoor blower.

Claims

1. A motor having a rotor that can rotate around a rotation axis, and a stator having a stator core and coils, A base that supports the motor, The base is provided with n (n is an integer) partitions facing the motor in the radial direction centered on the rotation axis of the rotor, It has, The n partitions are arranged in the circumferential direction around the rotation axis and extend so as to face at least a portion 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, The axial distance L1 from the base to the end of the partition that is farther from the base, and the axial distance L2 from the base to the end of the stator core that is closer to the base, satisfy the condition L1 > L2. The motor unit according to claim 1.

3. The axial distance L1 from the base to the end of the partition portion furthest from the base, and the axial distance L3 from the base to the end of the stator core furthest 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. A motor unit according to any one of claims 1 to 3.

5. The motor has legs that are attached to the base, Of the n partition sections, the legs are positioned between two adjacent partition sections. A motor unit according to any one of claims 1 to 3.

6. A motor having a rotor that can rotate around a rotation axis, and a stator having a stator core and coils, A base that supports the motor, A partition portion is provided on the base and faces the motor in the radial direction centered on the rotation axis of the rotor. It has, The partition portion extends so as to face at least a part of the stator core in the radial direction, The partition is positioned radially inward from the outermost radial end of the motor. Motor unit.

7. The aforementioned partition is formed in an annular shape so as to surround the motor from the radially outer side. The motor unit according to claim 6.

8. The partition section and the base are formed integrally. A motor unit according to any one of claims 1, 2, 3, 6, and 7.

9. The partition section and the base are separate components. A motor unit according to any one of claims 1, 2, 3, 6, and 7.

10. The motor has a through hole through which the first screw member passes, The aforementioned partition section has a through hole through which the second screw member passes, The base has a first screw hole that engages with the first screw member and a second screw hole that engages with the second screw member. The motor unit according to claim 9.

11. The motor has a first through hole through which a screw member passes, The aforementioned partition portion has a second through hole through which the screw member passes, The base has a screw hole that engages with the screw member. The motor unit according to claim 9.

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

13. The motor has legs in which the first through hole is formed, The partition portion has a flange portion in which the second through hole is formed, 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 radially outer side. A motor unit according to any one of claims 1, 2, 3, 6, and 7.

15. The base has an opening that communicates with the gap between the partition and the motor. A motor unit according to any one of claims 1, 2, 3, 6, and 7.

16. A motor unit according to any one of claims 1, 2, 3, 6, and 7, The impeller rotated by the motor of the motor unit and A fan equipped with a fan.

17. It comprises an outdoor unit and an indoor unit connected to the outdoor unit, At least one of the outdoor unit and the indoor unit is Having the blower described in claim 16 Air conditioning system.

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