Motor unit, blower and air conditioning device

Abstract

A motor unit has a motor having a rotor rotatable about a rotational axis and a stator having a stator core and a coil, a base supporting the motor, and a partition portion provided to the base and opposed to the motor in a radial direction about the rotational axis of the rotor. The partition portion extends in a manner opposed to at least a portion of the stator core in the radial direction.

Description

Technical Field

[0001] This disclosure relates to motor units, blowers, and air conditioning units. Background Technology

[0002] With the miniaturization of motors, efficient heat dissipation from the motor has become a challenge. For example, Patent Document 1 proposes a solution of installing a heat sink in the motor.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2011-252652 (see reference) Figure 1 ) Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, there is a limit to how much heat dissipation efficiency can be improved simply by adding a heat sink to the motor. Therefore, it is necessary to utilize the components surrounding the motor to efficiently dissipate its heat.

[0008] This disclosure was made to solve the aforementioned problems, and its purpose is to efficiently dissipate heat from the motor by utilizing the components surrounding the motor.

[0009] Methods for solving problems

[0010] The motor unit disclosed herein includes: a motor having a rotor and a stator, the rotor being rotatable about a rotation axis, the stator having a stator core and coils; a base supporting the motor; and a partition portion disposed on the base and radially opposed to the motor about the rotation axis of the rotor. The partition portion extends in a manner that is radially opposed to at least a portion of the stator core.

[0011] Invention Effects

[0012] According to this disclosure, air passes between the motor and the partition portion on the radially outer side of at least a portion of the stator core, thus enabling efficient heat dissipation from the motor. Attached Figure Description

[0013] Figure 1 This is a perspective view of the motor unit in Embodiment 1.

[0014] Figure 2 This is a front view (A) of the motor unit in Embodiment 1, and Figure 2 (A) shows a sectional view (B) at line segment 2B-2B.

[0015] Figure 3This is a front view (A) showing the base and partition portion of Embodiment 1, and Figure 3 (A) shows a sectional view (B) at line segment 3B-3B.

[0016] Figure 4 This is a cross-sectional view of the outdoor unit in Embodiment 1.

[0017] 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.

[0018] Figure 6 This is a schematic diagram illustrating the airflow in the motor unit of the comparative example.

[0019] Figure 7 This is a schematic diagram illustrating the airflow through the motor unit of Embodiment 1.

[0020] Figure 8 This is a front view showing the motor unit of Embodiment 1.

[0021] Figure 9 This is a front view (A) showing other examples of the base and partition portion of Embodiment 1, and Figure 9 (B) is a cross-sectional view of line segment 9B-9B shown in (A).

[0022] Figure 10 This is a front view (A) of the motor unit in Embodiment 2, and Figure 10 (B) is a cross-sectional view of line segment 10B-10B shown in (A).

[0023] Figure 11 This is a front view (A) of the base in embodiment 2, and Figure 11 (B) is a cross-sectional view of line segment 11B-11B shown in (A).

[0024] Figure 12 This is a front view (A) of the motor unit in embodiment 3. Figure 12 (A) shows a sectional view (B) at line segment 12B-12B, and a perspective view (C) showing the partition section.

[0025] Figure 13 This is a front view of the base representing embodiment 3.

[0026] Figure 14 This is a front view (A) of the motor unit in embodiment 4. Figure 14 (A) shows a sectional view (B) at line segment 14B-14B, and a perspective view (C) showing the partition section.

[0027] Figure 15This is a front view (A) of the motor unit in embodiment 5. Figure 15 (A) shows a sectional view (B) of line segment 15B-15B, and a perspective view (C) showing the partition section.

[0028] Figure 16 This is a diagram showing an air conditioning unit with a motor that can be applied to various embodiments and variations. Detailed Implementation

[0029] Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings. However, this disclosure is not limited to these embodiments.

[0030] Implementation method 1.

[0031] <Structure of Motor Unit 1>

[0032] Figure 1 This is a perspective view of the motor unit 1 in embodiment 1. Figure 2 (A) is the front view of motor unit 1. Figure 2 (B) is Figure 2 The sectional view at line segment 2B-2B shown in (A).

[0033] like Figure 1 As shown, 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 supporting them. The motor unit 1 is used, for example, as a blower in an air conditioning unit.

[0034] like Figure 2 As shown in (B), 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 the rotation axis Ax of the rotor 2.

[0035] In the following description, the direction of the rotation axis Ax of rotor 2, i.e. the central axis of shaft 10, is referred to as the "axial direction". The circumferential direction centered on the rotation axis Ax is referred to as the "circumferential direction". The radial direction centered on the rotation axis Ax is referred to as the "radial direction".

[0036] Shaft 10 from stator 3 to Figure 2 The left side of (B) protrudes, and an impeller 15 of, for example, a blower is mounted on the protrusion. Figure 4 Therefore, the protruding side of shaft 10 is sometimes referred to as the "load side", and the opposite side as the "load opposite side".

[0037] 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 center hole of the rotor core 21 by pressing or the like. However, resin or the like may also be provided between the shaft 10 and the rotor core 21.

[0038] The rotor core 21 is a ring-shaped component centered on the rotation axis Ax. The rotor core 21 is integrally formed by stacking multiple laminated elements along the axial direction and riveting them together. The laminated elements are, for example, electromagnetic steel plates with a thickness of 0.1 mm to 0.7 mm.

[0039] 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 peripheral 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, for example, a rare earth magnet containing neodymium (Nd), iron (Fe), and boron (B).

[0040] The stator 3 has an annular stator core 31 surrounding the rotor 2, a coil 32 wound around the stator core 31, an insulating portion (not shown) disposed between the stator core 31 and the coil 32, and a molded resin portion 33 covering them.

[0041] The stator core 31 is formed by stacking multiple electromagnetic steel plates along the axial direction and integrating them through riveting, welding, and bonding. The insulation part is made of thermoplastic resin such as PBT (polybutylene terephthalate), which is obtained by integrally molding with the stator core 31 or by assembling a resin molded body onto the stator core 31.

[0042] The coil 32 is formed of magnetic wire and is wound around the stator core 31 with an insulating portion in between. In addition, the stator core 31, the coil 32 and the insulating portion are sometimes collectively referred to as the stator portion 30.

[0043] The molding resin part 33 is formed of a thermosetting resin such as BMC (bulk molding compound). The molding resin part 33 has an opening 33a on the load side and a bottom 33b on the opposite side of the load. The rotor 2 is inserted into the hollow part inside the stator 3 through the opening 33a.

[0044] Furthermore, a circuit board can be arranged on the opposite side of the load of the stator core 31 and covered by a molding resin portion 33. In this case, a terminal for connection to the coil 32 is provided in the insulating portion of the stator portion 30, and the terminal engages with a hole in the circuit board and is connected by solder or the like.

[0045] A metal bracket 11 is installed at the opening 33a of the molding resin section 33. A bearing 12 is held in the bracket 11. In addition, a bearing 13 is held at the bottom 33b of the molding resin section 33. The bearings 12 and 13 are coaxial and support the shaft 10 on both sides of the rotor 2 in the axial direction.

[0046] The molded resin part 33 has a foot 35 that projects radially from its outer periphery. For example... Figure 2As shown in (A), n (n is an integer) feet 35 are arranged at equal intervals in the circumferential direction. The number of feet 35, n, is, for example, four, but is not limited to four; any number more than one is acceptable. The feet 35 are also called mounting feet. Screw fittings 37 are formed on the feet 35. Figure 1 The through hole 36 serves as the first through hole.

[0047] The base 4 is a plate-shaped component 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. A motor M is fixed to the front surface 41 side of the base 4. The base 4 is formed, for example, from a metal plate.

[0048] An opening 43 is formed in the center of the base 4. The opening 43 extends from the front 41 of the base 4 to the back 42. A portion of the load-opposite side of the motor M, more specifically the bottom 33b of the molded resin portion 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 peripheral surface of the motor M, i.e., the outer peripheral surface of the stator 3.

[0049] In the base 4, n (n is an integer) threaded holes 45 are formed at positions corresponding to the through holes 36 of the foot 35 of the molded resin part 33. Figure 3 (A)). The number n of threaded holes 45 is the same as the number of feet 35, which is four in this case. Each threaded hole 45 opens on the front 41 of the base 4.

[0050] By making the screw component 37 (which is a fixing component) Figure 1 The stator 3 is fixed to the base 4 by passing through the through hole 36 of the foot 35 and screwing it into the threaded hole 45. That is, the motor M is fixed to the base 4.

[0051] A partition plate 5 is provided on the base 4, facing the outer peripheral surface of the motor M. The partition plate 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 plate 5 is a plate-shaped component, also called a partition plate.

[0052] Here, n partition sections 5 (n is an integer) are arranged at intervals in the circumferential direction. The number n of partition sections 5 is the same as the number n of the feet 35 of the motor M, for example, four. However, the number n of partition sections 5 is not limited to four. The feet 35 of the motor M are located between adjacent partition sections 5 in the circumferential direction.

[0053] Figure 3 (A) is a front view showing the partition 5 and the base 4. Figure 3 (B) is Figure 3The cross-sectional view at line segment 3B-3B shown in (A). The partition portion 5 is integrally formed with the base 4. Alternatively, the partition portion 5 can be separated from the base 4 and fixed to the base 4 by screw components, which will be described later (see [reference]). Figure 10 (A) and (B)).

[0054] like Figure 3 As shown in (B), the partition portion 5 extends parallel to the rotation axis Ax from the front surface 41 of the base 4. Furthermore, as... Figure 3 As shown in (A), the partition portion 5 is arranged radially outside the opening 43 along the periphery of the opening 43. In the base 4, the aforementioned threaded holes 45 are formed between adjacent partition portions 5.

[0055] Partition 5 has a connection with motor M ( Figure 2 The first surface 51 facing the outer periphery of the partition portion 5 and the second surface 52 on the opposite side thereof. Both the first surface 51 and the second surface 52 are curved surfaces, more specifically, cylindrical surfaces centered on the rotation axis Ax. Alternatively, only the first surface 51 of the surfaces 51 and 52 of the partition portion 5 that faces the motor M may be a curved surface.

[0056] Figure 4 This indicates an air conditioning unit 200 including a motor unit 1. Figure 16 The outdoor unit 100 is a cross-sectional view. The outdoor unit 100 has a blower 101, a heat exchanger 105 and a housing 102 surrounding them.

[0057] The blower 101 has a motor unit 1 and an impeller 15 that rotates via a motor M of the motor unit 1. The impeller 15 is mounted to the end of the shaft 10 of the motor M via a hub 14.

[0058] The housing 102 forms the outline of the outdoor unit 100. The housing 102 has an opening 103 on the front surface and an opening 104 on the rear surface. The openings 103 and 104 are portions for air to pass through. A grid (not shown) is embedded in the opening 103.

[0059] The motor unit 1 is configured such that the rotation shaft Ax of the shaft 10 faces the front-to-back direction, the impeller 15 is opposite to the opening 103, and the base 4 is opposite to the opening 104. The base 4 is fixed to the top plate and bottom plate of the housing 102 by fixing parts 44 provided at its upper and lower ends.

[0060] The heat exchanger 105 has a plurality of fins 105a arranged in a left-right direction and heat transfer tubes 105b passing through these fins 105a. The rotation of the impeller 15 of the blower 101 generates an axial flow of air through the heat exchanger 105. To avoid obstructing the airflow through the heat exchanger 105, the width of the base 4 of the motor unit 1 in the left-right direction is set to be narrower than the width of the heat exchanger 105.

[0061] Figure 5 Figures (A) and (B) are used to illustrate the length of the partition section 5. Figure 5 In (A) and (B), the distance from the front 41 of the base 4 to the end of the partition 5 (i.e. the end on the side away from the base 4) is defined as the length L1 of the partition 5.

[0062] Furthermore, the distance from the front surface 41 of the base 4 to the end (i.e., the far end) 31b of the stator core 31 on the side away from the base 4 is defined as L3. Furthermore, the distance from the front surface 41 of the base 4 to the end (i.e., the near end) 31a of the stator core 31 on the base 4 side is defined as L2.

[0063] exist Figure 5 In the example shown in (A), the length L1 of the partition portion 5 is longer than the distance L3 from the front surface 41 of the base 4 to the distal end 31b of the stator core 31. That is, the partition portion 5 is radially opposed to the entire stator core 31. In other words, the partition portion 5 is radially opposed to the outer peripheral surface of the motor M on the radially outer side of the entire stator core 31.

[0064] exist Figure 5 In the example shown in (B), the length L1 of the partition portion 5 is less than or equal to the aforementioned distance L3, and is longer than the distance L2 from the base 4 to the near end 31a of the stator core 31. That is, the partition portion 5 is radially opposed to a portion of the stator core 31. In other words, the partition portion 5 is radially opposed to the outer peripheral surface of the motor M on the radially outer side of a portion of the stator core 31.

[0065] The length L1 of the partition portion 5 in embodiment 1 can be as follows: Figure 5 As shown in (A), L1 > L3, or as... Figure 5 As shown in (B), L3 ≥ L1 > L2. That is, the partition portion 5 only needs to be radially opposed to at least a portion of the stator core 31. In other words, the partition portion 5 only needs to be radially opposed to the outer peripheral surface of the motor M on the radially outer side of at least a portion of the stator core 31.

[0066] <Function>

[0067] The operation of the motor unit 1 in Embodiment 1 will be explained. Figure 4In the outdoor unit 100 shown, when the impeller 15 rotates due to the rotation of the motor M, airflow is generated in the axial direction. Air flows in from the opening 104 of the outdoor unit 100, passes through the heat exchanger 105, and then passes through the motor unit 1, and is discharged from the opening 103.

[0068] Figure 6 This is a schematic diagram illustrating 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.

[0069] Air (indicated by arrow A) from heat exchanger 105 to motor unit 1E flows forward around motor M through the gap between opening 43 of base 4 and motor M. At this time, the air flowing around motor M disperses radially outward (i.e. away from the outer peripheral surface of motor M), thus failing to fully absorb heat from motor M, resulting in low heat dissipation efficiency of motor M.

[0070] Figure 7 This is a schematic diagram illustrating the airflow through the motor unit 1 of Embodiment 1. The motor unit 1 of Embodiment 1 has a partition portion 5 facing the outer periphery of the motor M. Therefore, the air A arriving at the motor unit 1 from the heat exchanger 105 flows forward between the motor M and the partition portion 5 after passing through the gap between the opening 43 of the base 4 and the motor M, as indicated by arrow F.

[0071] The partition 5 suppresses the radial outward dispersion of airflow around the motor M. Since the air flows axially along the outer peripheral surface of the motor M, the heat generated by the coil 32 can be dissipated efficiently.

[0072] In addition, Figure 7 In the example shown, such as Figure 5 As shown in (A), the length L1 of the partition portion 5 is longer than the distance L3 from the base 4 to the distal end 31b of the stator core 31. That is, the partition portion 5 is radially opposed to the entire stator core 31. Therefore, air flows axially along the outer peripheral surface of the motor M on the radially outer side of the entire stator core 31.

[0073] The heat generated by the coil 32 of the motor M is transferred via the stator core 31 to the outer peripheral surface of the motor M, i.e., the outer peripheral surface of the molded resin part 33. Therefore, by causing air to flow axially along the outer peripheral surface of the motor M on the radially outer side of the stator core 31 as a whole, the heat generated by the coil 32 can be dissipated particularly efficiently.

[0074] However, as Figure 5As shown in (B), if the length L1 of the partition portion 5 is longer than the distance L2 from the base 4 to the near end 31a of the stator core 31, then air flows axially along the outer peripheral surface of the motor M on at least a portion of the radially outer side of the stator core 31. Therefore, heat generated by the coil 32 can be dissipated efficiently.

[0075] In addition, such as Figure 2 As shown in (A), the first surface 51 of the partition portion 5 opposite to 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 portion 5 is constant in the circumferential direction. Therefore, the circumferential distribution of the airflow between the motor M and the partition portion 5 becomes uniform, and the heat of the motor M can be dissipated uniformly.

[0076] Figure 8 This diagram shows the positional relationship between the motor M and the partition portion 5 in a plane perpendicular to the rotation axis Ax. The outermost radial position of the motor M (referred to as the outermost position) Pm is indicated by a dashed line. Here, the outermost position Pm of the motor M is the radially outer end of the foot portion 35 of the motor M.

[0077] like Figure 8 As shown, the partition 5 is positioned radially inward from the outermost position Pm of the motor M. If the partition 5 is positioned outward from the outermost position Pm of the motor M, the base 4 needs to be increased, raising the manufacturing cost of the motor unit 1. Furthermore, if the base 4 is increased, air flowing outward in the width direction of the base 4 will have difficulty reaching the motor unit 1.

[0078] By positioning the partition 5 radially inward from the outermost position Pm of the motor M, the base 4 can be reduced in size. This reduces manufacturing costs and allows for better heat dissipation by ensuring airflow from the base 4 reaches the motor unit 1 in the width direction.

[0079] <Effects of Implementation Method 1>

[0080] 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 a coil 32; a base 4 supporting the motor M; and a partition portion 5 disposed on the base 4 and radially opposite the motor M. The partition portion 5 is radially opposite at least a portion of the stator core 31.

[0081] Therefore, air flows axially along the motor M on at least a radially outer side of the stator core 31. This airflow efficiently dissipates heat transferred from the coil 32 through the stator core 31 to the outer peripheral surface of the motor M.

[0082] Furthermore, the stator core 31 is located axially on one side of the base 4. If the axial distance from the base 4 to the end portion of the partition portion 5 on the side away from the base 4 is defined as L1, and the axial distance from the base 4 to the proximal end portion 31a of the stator core 31 on the side close to the base 4 is defined as L2, then distances L1 and L2 satisfy L1 > L2. Therefore, with a simple structure, as described above, the partition portion 5 can be radially opposed to the motor M in at least a portion of the radially outer region of the stator core 31.

[0083] Furthermore, by ensuring that the distance L3 from the base 4 to the end of the stator core 31 on the side furthest from the base 4 (i.e., the distal end 31b) satisfies L1 > L3, air flows along the motor M in the region radially outward of the stator core 31 as a whole. Therefore, heat dissipation from the motor M can be achieved with particularly high efficiency.

[0084] In addition, since the first surface 51 of the partition portion 5 opposite to the motor M is a concave curved surface, the distance between the motor M and the partition portion 5 can be made nearly constant in the circumferential direction, which can dissipate heat from the motor M more efficiently.

[0085] Furthermore, since the partition plate 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 passing through the outside of the base 4 to reach the motor unit 1 for heat dissipation.

[0086] Furthermore, since the partition 5 and the base 4 are integrally formed, the motor unit 1 can be constructed with fewer parts.

[0087] In addition, the n partition sections 5 are arranged circumferentially, and the foot 35 of the motor M is located between two adjacent partition sections 5, so the space between the foot 35 can be used to arrange the partition sections 5.

[0088] In addition, the motor M has a molded resin portion 33 that serves as a resin portion surrounding the stator core 31 from the radial outside, thus enabling the heat generated by the coil 32 to be dissipated from the outer periphery of the molded resin portion 33.

[0089] In addition, the base 4 has an opening 43 that communicates with the gap between the partition 5 and the motor M, so that air from the heat exchanger 105 to the motor unit 1 can flow in the gap between the partition 5 and the motor M to dissipate heat from the motor M.

[0090] Variations.

[0091] Figure 9 (A) is a front view showing the partition 5A and base 4 of the modified example. Figure 9 (B) is Figure 9A cross-sectional view at line segment 9B-9B shown in (A). The partition portion 5 of Embodiment 1 has a curved shape, but as... Figure 9 As shown in (A) and (B), the partition portion 5A in the modified example is flat. That is, both the first surface 51 and the second surface 52 of the partition portion 5A are planar.

[0092] In this modified example, from heat exchanger 105 ( Figure 4 Air A reaching motor unit 1 Figure 7 The heat dissipation of the motor M is improved by connecting it to the partition plate 5A. Furthermore, since the partition plate 5A is flat, it is easy to manufacture, thus reducing the manufacturing cost of the motor unit 1.

[0093] Implementation method 2.

[0094] Figure 10 (A) is a front view of motor unit 1A in embodiment 2. Figure 10 (B) is Figure 10 The cross-sectional view at line segment 10B-10B shown in (A). In the motor unit 1A of Embodiment 2, the partition portion 6 and the base 4 are formed separately.

[0095] like Figure 10 As shown in (A), in the motor unit 1A of Embodiment 2, n (n is an integer) partition portions 6 are arranged circumferentially along the outer peripheral surface of the motor M. The number of partition portions 6 n is, for example, four, but is not limited to four, as long as there is one or more. The feet 35 of the motor M are arranged between adjacent partition portions 6 in the circumferential direction.

[0096] The partition portion 6 has a wall portion 61 extending along the outer peripheral surface of the motor M and a flange portion 62 formed at the end of the base 4 side of the wall portion 61. The material of the partition portion 6 is, for example, a metal plate, but it can also be other materials.

[0097] The axial length of the wall portion 61 is the same as the length L1 of the partition portion 5 described in Embodiment 1. Figure 5 (A) and (B) are the same. Additionally, the wall portion 61 has the same curved shape as the partition portion 5 in Embodiment 1, but it may also have, for example, the same flat plate shape as the partition portion 5A in the modified example. Figure 9 (A) and (B)).

[0098] like Figure 10 As shown in (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 a through hole 63 through which a screw member 65 for fixing the partition portion 6 to the base 4 passes.

[0099] The partition portion 6 is fixed to the base 4 by screwing the screw component 65 through the through hole 63 of the flange portion 62 and engaging with the threaded hole 46 of the base 4.

[0100] In addition, screw component 37 for fixing motor M ( Figure 1 The screw component 65, also known as the first screw component, is used to fix the partition portion 6 and is also known as the second screw component. The through hole 36 of the foot portion 35 of the motor M is also known as the first through hole, and the through hole 63 of the flange portion 62 of the partition portion 6 is also known as the second through hole.

[0101] Figure 11 (A) is the front view of the base 4 representing embodiment 2. Figure 11 (B) is Figure 11 The cross-sectional view at line segment 11B-11B shown in (A). Figure 11 As shown in (A) and (B), in addition to the threaded hole 45 for fixing the motor M, a threaded hole 46 for fixing the partition portion 6 is also formed on the base 4. The threaded holes 45 and 46 are alternately formed around the opening portion 43. The threaded hole 45 is also referred to as the first threaded hole, and the threaded hole 46 is also referred to as the second threaded hole.

[0102] In the motor unit 1A of Embodiment 2, similarly to the motor unit 1 of Embodiment 1, air flows axially between the partition portion 6 and the motor M, thus enabling efficient heat dissipation from the motor M.

[0103] Apart from 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.

[0104] As explained above, in the motor unit 1A of Embodiment 2, since the partition 6 and the base 4 are formed separately, the motor M can be installed on the base 4 before the partition 6 is installed on the base 4. Therefore, the installation operation of the motor M on the base 4 is simplified. In addition, the structure of the base 4 can be simplified.

[0105] Implementation method 3.

[0106] Figure 12 (A) is a front view of motor unit 1B in embodiment 3. Figure 12 (B) is Figure 12 The sectional view at line segment 12B-12B shown in (A). Figure 12 (C) is a schematic diagram showing the partition portion 7 in Embodiment 3. In the motor unit 1B of Embodiment 3, the partition portion 7 and the base 4 are formed separately, and the partition portion 7 and the motor M are fixed to the base 4 by a common screw component 75.

[0107] like Figure 12As shown in (A), in the motor unit 1B of Embodiment 3, n (n is an integer) partition portions 7 are arranged circumferentially along the outer peripheral surface of the motor M. The number of partition portions 7 n is, for example, four, but is not limited to four, as long as there is one or more. The feet 35 of the motor M are arranged between adjacent partition portions 7 in the circumferential direction.

[0108] The partition portion 7 has a wall portion 71 extending along the outer peripheral surface of the motor M and a flange portion 72 formed at the end of the base 4 side of the wall portion 71. Figure 12 (B)). The material of the partition 7 is, for example, a metal plate, but it can also be other materials.

[0109] The axial length of the wall portion 71 is the same as the length L1 of the partition portion 5 described in Embodiment 1. Figure 5 (A) and (B) are the same. Additionally, the wall portion 71 has the same curved shape as the partition portion 5 in Embodiment 1, but it may also have, for example, the same flat plate shape as the partition portion 5A in the modified example. Figure 9 (A) and (B)).

[0110] like Figure 12 As shown in (C), the flange portion 72 is formed to protrude circumferentially from the end of the wall portion 71 on the base 4 side. 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.

[0111] 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 foot portion 35 of the motor M is also referred to as the first through hole, and the through hole 73 of the flange portion 72 of the partition portion 7 is also referred to as the second through hole.

[0112] like Figure 12 As shown in (B), the foot 35 of the motor M is mounted on the base 4 in such a way that it coincides axially with the flange 72 of the partition portion 7. More specifically, the foot 35 of the motor M is mounted on the base 4 in such a way that the flange 72 of the partition portion 7 is sandwiched between the motor M and the base 4.

[0113] The screw component 75, which serves as a fixing component, passes through the through hole 36 of the foot portion 35 and the through hole 73 of the flange portion 72, and engages with the threaded hole 45 of the base 4, thereby fixing the motor M and the partition portion 7 to the base 4.

[0114] Figure 13 This is a front view of the base 4 in embodiment 3. (Example) Figure 13 As shown, the base 4 has threaded holes 45 for fixing the motor M and the partition 7, but not the dedicated threaded holes 46 for fixing the partition 7 as in Embodiment 2. Figure 11 (A) and (B)).

[0115] In the motor unit 1B of embodiment 3, similarly to the motor unit 1 of embodiment 1, air flows axially between the partition portion 7 and the motor M, thus enabling efficient heat dissipation from the motor M.

[0116] Apart from 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.

[0117] As explained above, in the motor unit 1B of Embodiment 3, the partition portion 7 can be fixed to the base 4 using a common screw component 75, thus reducing the number of screw components and the number of threaded holes formed in the base 4. Therefore, the manufacturing cost of the motor unit 1B can be reduced.

[0118] Implementation method 4.

[0119] Figure 14 (A) is a front view of motor unit 1C according to embodiment 4. Figure 14 (B) is Figure 14 The sectional view at line segment 14B-14B shown in (A). Figure 14 (C) is a perspective view showing the partition portion 8 of embodiment 4. In the motor unit 1C of embodiment 4, the partition portion 8 and the base 4 are formed separately, and the partition portion 8 and the motor M are fixed to the base 4 by a common screw component.

[0120] like Figure 14 As shown in (A), in the motor unit 1C of Embodiment 4, n (n is an integer) partition portions 8 are arranged circumferentially along the outer peripheral surface of the motor M. The number of partition portions 8 n is, for example, four, but is not limited to four, as long as there is one or more. The feet 35 of the motor M are arranged between adjacent partition portions 8 in the circumferential direction.

[0121] The partition portion 8 has: a wall portion 81 extending along the outer peripheral surface of the motor M; and a flange portion 82 formed at a position on the wall portion 81 at a distance T from the end of the base 4. The partition portion 8 may be made of, for example, a metal plate, but may also be made of other materials.

[0122] The axial length of the wall portion 81 is the same as the length L1 of the partition portion 5 described in Embodiment 1. Figure 5 (A) and (B) are the same. Additionally, the wall portion 81 has the same curved shape as the partition portion 5 in Embodiment 1, but it may also have, for example, the same flat plate shape as the partition portion 5A in the modified example. Figure 9 (A) and (B)).

[0123] like Figure 14As shown in (C), the flange portion 82 is formed to protrude circumferentially from a position axially away from the axial end of the wall portion 81 by a length T, which is equivalent to the thickness of the foot 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.

[0124] 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 foot portion 35 of the motor M is also referred to as the first through hole, and the through hole 83 of the flange portion 82 of the partition portion 8 is also referred to as the second through hole.

[0125] like Figure 14 As shown in (B), the flange portion 82 of the partition portion 8 is mounted to the base 4 in such a way that it coincides with the foot portion 35 of the motor M in the axial direction. More specifically, the flange portion 82 of the partition portion 8 is mounted to the base 4 in such a way that the foot portion 35 of the motor M is sandwiched between the partition portion 8 and the base 4.

[0126] The screw component 85, serving as a fixing component, passes through the through hole 83 of the flange portion 82 and the through hole 36 of the foot portion 35, and engages with the threaded hole 45 of the base 4, thereby fixing the motor M and the partition portion 8 to the base 4. The arrangement of the threaded hole 45 in the base 4 is as described in Embodiment 3. Figure 13 As shown.

[0127] In the motor unit 1C of embodiment 4, similarly to the motor unit 1 of embodiment 1, air flows axially between the partition portion 8 and the motor M, thus enabling efficient heat dissipation from the motor M.

[0128] Apart from 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.

[0129] As explained above, in the motor unit 1C of Embodiment 4, the partition portion 8 can be fixed to the base 4 using a common screw component 75, thus reducing the number of screw components and the number of threaded holes formed in the base 4. Therefore, the manufacturing cost of the motor unit 1C can be reduced. In addition, the motor M can be installed on the base 4 before the partition portion 8 is installed on the base 4, thus simplifying the installation operation of the motor M.

[0130] Implementation method 5.

[0131] Figure 15 (A) is a front view of motor unit 1D in embodiment 5. Figure 15 (B) is Figure 15 The sectional view at line segment 15B-15B shown in (C). Figure 15(C) is a perspective view showing the partition portion 9 of Embodiment 5. The motor unit 1D of Embodiment 5 has an annular partition portion 9 and a base 4.

[0132] like Figure 15 As shown in (A), in the motor unit 1D of embodiment 5, an annular partition 9 centered on the rotation axis Ax is provided in a manner that surrounds the motor M.

[0133] The partition portion 9 has n wall portions 91 arranged circumferentially along the outer peripheral surface of the motor M and flange portions 92 formed between adjacent wall portions 91. The number of wall portions 91 n is, for example, four, but is not limited to four, as long as there is one or more. The material of the partition portion 9 is, for example, a metal plate, but it can also be other materials.

[0134] The axial length of the wall portion 91 is the same as the length L1 of the partition portion 5 described in Embodiment 1. Figure 5 (A) and (B) are the same.

[0135] like Figure 15 As shown in (C), a flange 92 is formed at the axial end of the wall portion 91 and extends in such a way as to connect adjacent wall portions 91. The flange 92 has a through hole 93 through which a screw member 95 for fixing the partition portion 9 to the base 4 passes.

[0136] 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 foot portion 35 of the motor M is also called the first through hole, and the through hole 93 of the flange portion 92 of the partition portion 9 is also called the second through hole.

[0137] like Figure 15 As shown in (B), the foot 35 of the motor M is mounted on the base 4 in a manner that overlaps with the flange 92 of the partition portion 9. More specifically, the foot 35 of the motor M is mounted on the base 4 in a manner that the flange 92 of the partition portion 9 is sandwiched between the motor M and the base 4.

[0138] The screw component 95, serving as a fixing member, passes through the through hole 93 of the flange portion 92 and the through hole 36 of the foot portion 35, and engages with the threaded hole 45 of the base 4, thereby fixing the motor M and the partition portion 9 to the base 4. The arrangement of the threaded hole 45 in the base 4 is as described in Embodiment 3. Figure 13 As shown.

[0139] In the motor unit 1D of embodiment 5, similarly to the motor unit 1 of embodiment 1, air flows axially between the partition portion 9 and the motor M, thus enabling efficient heat dissipation from the motor M.

[0140] Apart from 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.

[0141] Furthermore, the flange portion 92 of the partition portion 9 can also be like the flange portion 82 of embodiment 4. Figure 14 The foot 35 of the motor M is clamped between the base 4 and the base 4, as in (B).

[0142] Alternatively, the partition 9 can also be fixed to the base 4 using a screw component different from the screw component used to fix the motor M. In this case, as long as two types of threaded holes 45 and 46 are formed on the base 4 as in Embodiment 3... Figure 11 (A) is acceptable. Alternatively, the partition 9 can also be integrally formed with the base 4, as in the partition 5 of embodiment 1.

[0143] As explained above, in the motor unit 1D of Embodiment 5, since the partition portion 9 is integrally formed, the number of parts is reduced, and the manufacturing process of the motor unit 1D can be simplified.

[0144] <Air conditioning unit>

[0145] Next, an air conditioning unit in which the motors of each implementation method can be applied will be described. Figure 16 This indicates that the outdoor unit 100 using implementation method 1 has been implemented. Figure 4 A diagram showing the structure of an air conditioning unit 200. The air conditioning unit 200 includes an outdoor unit 100, an indoor unit 201, and refrigerant piping 207 connecting them.

[0146] The indoor unit 201 has an indoor fan 202. The indoor fan 202 is, for example, a crossflow fan, having an impeller 203, a motor 204 that drives the impeller 203, a heat exchanger 205 disposed opposite to the impeller 203, and a housing 206 that houses them.

[0147] 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, as well as the heat exchanger 205 of the indoor unit 201, are connected via refrigerant piping 207 to form a refrigerant circuit.

[0148] In the outdoor unit 100, the impeller 15 rotates due to the rotation of the motor M of the blower 101, thereby drawing outdoor air through the heat exchanger 105. During heating operation, as 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. The cooled air is then drawn by the rotation of the impeller 15 through the motor unit 1 and exits from the opening 103 ( Figure 4 Release it outdoors.

[0149] In the indoor unit 201, the impeller 203 rotates due to the rotation of the motor 204 of the indoor fan 202. During heating operation, the air heated by the refrigerant condensing in the heat exchanger 205 is blown into the room by the rotation of the impeller 203.

[0150] As described in Embodiment 1, air passing through the heat exchanger 105 passes through the motor M, thus dissipating heat from the motor M. In particular, due to the presence of a partition portion 5 opposite the motor M... Figure 1 Therefore, it can efficiently dissipate heat from the motor M. This enables stable operation of the blower 101 and improves the reliability of the air conditioning unit 200.

[0151] Alternatively, the motor unit of the modified embodiment, embodiment 2, 3, 4 or 5 may be used instead of the motor unit 1 of embodiment 1. In addition, here, the motor unit 1 is used in the drive of the air blower (i.e. the outdoor air blower) 101 of the outdoor unit 100, but it is sufficient to use the motor unit 1 in the drive source of at least one of the drive sources of the outdoor air blower 101 and the indoor air blower 202.

[0152] Furthermore, the motor unit 1 described in each embodiment can also be mounted on electrical equipment other than the air blower of the air conditioning unit.

[0153] The preferred embodiments have been described in detail above, but this disclosure is not limited to the above embodiments and various improvements or modifications can be made.

[0154] Label Explanation

[0155] 1, 1A, 1B, 1C, 1D: Motor unit; 2: Rotor; 3: Stator; 4: Base; 5, 6, 7, 8, 9: Partition plate; 10: Shaft; 15: Impeller; 21: Rotor core; 23: Magnet; 30: Stator section; 31: Stator core; 32: Coil; 33: Molded resin section (resin section); 35: Foot section (mounting section); 36: Through hole (first through hole); 41: Front side (first side); 42: Back side (second side); 43: Opening; 45: Threaded hole (first threaded hole); 46: Threaded hole (second threaded hole); 51: First surface; 52: Second surface; 61, 71, 81, 91: Wall portion; 62, 72, 82, 92: Flange portion; 63, 73, 83, 93: Through hole (second through hole); 65, 75, 85, 95: Screw component; 100: Outdoor unit; 101: Air supply fan (outdoor air supply fan); 102: Housing; 103, 104: Opening portion; 105: Heat exchanger; 200: Air conditioning unit; 201: Indoor unit; 202: Indoor air supply fan.

Claims

1. A motor unit comprising: A motor having a rotor and a stator, the rotor being rotatable about a rotation axis, and the stator having a stator core and coils; A base that supports the motor; and A partition portion, disposed on the base, is positioned radially opposite the motor about the rotation axis of the rotor. The partition portion extends in a manner that is opposite to at least a portion of the stator core in the radial direction.

2. The motor unit according to claim 1, wherein, The stator core is located on one side of the base along the axial direction of the rotating shaft. The axial distance L1 from the base to the end of the partition portion on the side away from the base and the axial distance L2 from the base to the end of the stator core on the side close to the base satisfy L1 > L2.

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

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

5. The motor unit according to any one of claims 1 to 4, wherein, n partition portions, each containing a partition portion, are arranged circumferentially around the rotation axis, where n is an integer.

6. The motor unit according to claim 5, wherein, The motor has feet mounted on the base. The foot is located between two adjacent partition sections among the n partition sections.

7. The motor unit according to any one of claims 1 to 4, wherein, The partition portion is formed in a ring shape, surrounding the motor from the outer side in the radial direction.

8. The motor unit according to any one of claims 1 to 7, wherein, The partition portion is positioned radially inward from the outermost end of the motor.

9. The motor unit according to any one of claims 1 to 8, wherein, The partition portion is integrally formed with the base.

10. The motor unit according to any one of claims 1 to 8, wherein, The partition plate and the base are separate parts.

11. The motor unit according to claim 10, wherein, The motor has a through hole through which the first screw component passes. The partition portion has a through hole for the second screw component to pass through. The base has a first threaded hole that engages with the first screw component and a second threaded hole that engages with the second screw component.

12. The motor unit according to claim 10, wherein, The motor has a first through hole for the screw component to pass through. The partition portion has a second through hole for the screw component to pass through. The base has a threaded hole that engages with the screw component.

13. The motor unit according to claim 12, wherein, The motor has a foot with the first through hole formed therein. The partition portion has a flange portion with the second through hole formed thereon. The flange is installed between the foot and the base.

14. The motor unit according to claim 12, wherein, The motor has a foot with the first through hole formed therein. The partition portion has a flange portion with the second through hole formed thereon. The foot is installed between the flange and the base.

15. The motor unit according to any one of claims 1 to 14, wherein, The motor has a resin portion that surrounds the stator core from the radially outer side.

16. The motor unit according to any one of claims 1 to 15, wherein, The base has an opening that communicates with the gap between the partition portion and the motor.

17. A blower, comprising: The motor unit according to any one of claims 1 to 16; and The impeller rotates via the motor in the motor unit.

18. An air conditioning unit comprising an outdoor unit and an indoor unit connected to said outdoor unit, At least one of the outdoor unit and the indoor unit has the air supply fan as described in claim 17.

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