WO2024201701A1 - モータユニット、送風機および空気調和装置 - Google Patents

モータユニット、送風機および空気調和装置 Download PDF

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Publication number
WO2024201701A1
WO2024201701A1 PCT/JP2023/012461 JP2023012461W WO2024201701A1 WO 2024201701 A1 WO2024201701 A1 WO 2024201701A1 JP 2023012461 W JP2023012461 W JP 2023012461W WO 2024201701 A1 WO2024201701 A1 WO 2024201701A1
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WO
WIPO (PCT)
Prior art keywords
motor
base
partition
motor unit
unit according
Prior art date
Application number
PCT/JP2023/012461
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English (en)
French (fr)
Japanese (ja)
Inventor
諒伍 ▲高▼橋
隆徳 渡邉
貴也 下川
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2023/012461 priority Critical patent/WO2024201701A1/ja
Priority to JP2025509324A priority patent/JPWO2024201701A1/ja
Publication of WO2024201701A1 publication Critical patent/WO2024201701A1/ja

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle

Definitions

  • This disclosure relates to a motor unit, a blower, and an air conditioner.
  • Patent Document 1 proposes providing a heat sink on the motor.
  • This disclosure has been made to solve the above problems, and aims to efficiently dissipate heat from the motor by utilizing components surrounding the motor.
  • the motor unit of the present disclosure has a motor having a rotor that can rotate around a rotation axis, a stator having a stator core and a coil, a base that supports the motor, and a partition portion that is provided on the base and faces the motor in a radial direction centered on the rotation axis of the rotor.
  • the partition portion extends so as to face at least a portion of the stator core in the radial direction.
  • air passes between the motor and the partition on at least a portion of the radial outside of the stator core, allowing the heat of the motor to be dissipated efficiently.
  • FIG. 1 is a perspective view showing a motor unit according to a first embodiment of the present invention
  • 2A is a front view showing the motor unit of the first embodiment
  • FIG. 2B is a cross-sectional view taken along line 2B-2B shown in FIG. 3A is a front view showing the base and the partition part of the first embodiment
  • FIG. 3B is a cross-sectional view taken along line 3B-3B shown in FIG. 1 is a cross-sectional view showing an outdoor unit of a first embodiment.
  • 5A and 5B are cross-sectional views showing examples of partition parts having different lengths in the motor unit of embodiment 1.
  • 6 is a schematic diagram showing the flow of air passing through a motor unit of a comparative example.
  • FIG. 5 is a schematic diagram showing the flow of air passing through the motor unit of the first embodiment.
  • FIG. FIG. 2 is a front view showing the motor unit according to the first embodiment.
  • 9A is a front view showing another example of the base and the partition part of the first embodiment, and FIG. 9B is a cross-sectional view taken along line 9B-9B shown in FIG. 9A.
  • 10A is a front view showing a motor unit according to a second embodiment
  • FIG. 12B is a cross-sectional view taken along line 12B-12B shown in FIG. 12A
  • FIG. 12C is a perspective view showing a partition portion.
  • FIG. 13 is a front view showing the base of the third embodiment.
  • 14A is a front view showing a motor unit of embodiment 4
  • FIG. 14B is a cross-sectional view taken along line 14B-14B shown in FIG. 14A
  • FIG. 14C is a perspective view showing a partition portion.
  • 15A is a front view showing a motor unit of embodiment 5
  • FIG. 15B is a cross-sectional view taken along line 15B-15B shown in FIG. 15A
  • FIG. 15C is a perspective view showing a partition portion.
  • 1 is a diagram showing an air conditioning device to which the motors of the respective embodiments and modified examples can be applied.
  • Fig. 1 is a perspective view showing a motor unit 1 in embodiment 1.
  • Fig. 2(A) is a front view showing the motor unit 1.
  • Fig. 2(B) is a cross-sectional view taken along line 2B-2B shown in Fig. 2(A).
  • the motor unit 1 has a motor M, a partition 5 arranged around the motor M, and a base 4 as a support for these.
  • the motor unit 1 is used, for example, in a blower for an air conditioning device.
  • 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.
  • the direction of the rotation axis Ax of the rotor 2, i.e., the central axis of the 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.”
  • the shaft 10 protrudes from the stator 3 to the left in FIG. 2(B), and for example, an impeller 15 (FIG. 4) of a blower is attached to the protruding portion. Therefore, the protruding side of the shaft 10 is sometimes called the "load side,” and the opposite side is sometimes called the "anti-load side.”
  • the rotor 2 has a rotor core 21 fixed to the shaft 10 and a number of magnets 23 embedded in the rotor core 21.
  • the shaft 10 is fixed in the central hole of the rotor core 21 by press-fitting or the like. However, resin or the like may be provided between the shaft 10 and the rotor core 21.
  • the rotor core 21 is an annular member centered on the rotation axis Ax.
  • the rotor core 21 is made by stacking multiple laminated elements in the axial direction and integrating them by crimping or the like.
  • the laminated elements are, for example, electromagnetic steel sheets, and have a sheet thickness of 0.1 mm to 0.7 mm.
  • the rotor core 21 has multiple magnet insertion holes 22.
  • the magnet insertion holes 22 are arranged at equal intervals in the circumferential direction along the outer circumferential surface of the rotor core 21.
  • a magnet 23, which is a permanent magnet, is inserted into each magnet insertion hole 22.
  • the magnet 23 is composed of a rare earth magnet containing, for example, neodymium (Nd), iron (Fe) and boron (B).
  • the stator 3 has an annular stator core 31 that surrounds the rotor 2, a coil 32 wound around the stator core 31, an insulating part (not shown) provided between the stator core 31 and the coil 32, and a molded resin part 33 as a resin part that covers these.
  • the stator core 31 is made by stacking multiple electromagnetic steel plates in the axial direction and integrating them by crimping, welding, gluing, etc.
  • the insulating part is made of a thermoplastic resin such as PBT (polybutylene terephthalate) and is either molded integrally with the stator core 31 or obtained by assembling a resin molded body to the stator core 31.
  • 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 may be collectively referred to as the stator section 30.
  • the molded resin part 33 is formed of a thermosetting resin such as BMC (bulk molding compound).
  • the molded resin part 33 has an opening 33a on the load side and a bottom 33b on the anti-load side.
  • the rotor 2 is inserted into the hollow part inside the stator 3 from the opening 33a.
  • a circuit board may be placed on the anti-load side of the stator core 31 and covered with the molded resin part 33.
  • a terminal connected to the coil 32 is provided on the insulating part of the stator part 30, and the terminal is engaged with a hole in the circuit board and connected with solder or the like.
  • a metal bracket 11 is attached to the opening 33a of the molded resin part 33.
  • the bracket 11 holds the bearing 12.
  • the bottom part 33b of the molded resin part 33 holds the bearing 13.
  • the bearings 12 and 13 are coaxial and support the shaft 10 on both axial sides of the rotor 2.
  • the molded resin portion 33 has legs 35 that protrude radially from its outer circumferential surface. As shown in FIG. 2(A), n (n is an integer) legs 35 are arranged at equal intervals in the circumferential direction. The number n of legs 35 is, for example, four, but is not limited to four and may be one or more. The legs 35 are also referred to as mounting legs. The legs 35 are formed with through holes 36 as first through holes through which the screw member 37 (FIG. 1) passes.
  • the base 4 is a plate-like member having a front surface 41 as a first surface and a back surface 42 as a second surface.
  • the front surface 41 and the back surface 42 are surfaces perpendicular to the rotation axis Ax.
  • the motor M is fixed to the front surface 41 side of the base 4.
  • the base 4 is formed, for example, from sheet metal.
  • An opening 43 is formed in the center of the base 4.
  • the opening 43 reaches from the front surface 41 to the back surface 42 of the base 4.
  • a gap is formed between the inner circumference of the opening 43 of the base 4 and the outer circumferential surface of the motor M, i.e., the outer circumferential surface of the stator 3.
  • n (n is an integer) screw holes 45 are formed at positions corresponding to the through holes 36 of the leg portions 35 of the molded resin portion 33.
  • the number n of screw holes 45 is the same as the number of leg portions 35, which is four in this example.
  • Each screw hole 45 opens into the surface 41 of the base 4.
  • the stator 3 is fixed to the base 4 by passing the screw member 37 (FIG. 1) as a fixing member through the through hole 36 of the leg 35 and screwing it into the screw hole 45.
  • the motor M is fixed to the base 4.
  • the base 4 is provided with a partition 5 so as to face the outer peripheral surface of the motor M.
  • the partition 5 faces the outer peripheral surface of the motor M, i.e., the outer peripheral surface of the stator 3, in the radial direction.
  • the partition 5 is a plate-shaped member, and is also called a partition plate.
  • n (n is an integer) partition sections 5 are arranged with 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, and is, 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.
  • Fig. 3(A) is a front view showing the partition 5 and base 4.
  • Fig. 3(B) is a cross-sectional view taken along line 3B-3B in Fig. 3(A).
  • the partition 5 is formed integrally with the base 4. Note that the partition 5 may be separate from the base 4 and fixed to the base 4 by a screw member, which will be described later (see Figs. 10(A) and (B)).
  • the partition portion 5 extends parallel to the rotation axis Ax from the surface 41 of the base 4. Also, as shown in FIG. 3(A), the partition portion 5 is disposed radially outward of the opening 43 and along the periphery of the opening 43. The above-mentioned screw holes 45 are formed between adjacent partition portions 5 in the base 4.
  • Figure 4 is a cross-sectional view showing the outdoor unit 100 of the air conditioning device 200 ( Figure 16), which includes the motor unit 1.
  • the outdoor unit 100 has a blower 101, a heat exchanger 105, and a housing 102 that surrounds these.
  • the blower 101 has a motor unit 1 and an impeller 15 that is rotated by a motor M of the motor unit 1.
  • the impeller 15 is attached to the tip of the shaft 10 of the motor M via a hub 14.
  • the housing 102 forms the outer shell of the outdoor unit 100.
  • the housing 102 has an opening 103 on the front side and an opening 104 on the back side.
  • the openings 103 and 104 are sections through which air passes.
  • a grid (not shown) is fitted into the opening 103.
  • the motor unit 1 is arranged so that the rotation axis Ax of the shaft 10 faces the front-rear direction, the impeller 15 faces the opening 103, and the base 4 faces the opening 104.
  • the base 4 is fixed to the top and bottom plates of the housing 102 by fixing parts 44 provided at its upper and lower ends.
  • the heat exchanger 105 has multiple fins 105a arranged in the left-right direction and a heat transfer tube 105b that passes through these fins 105a. Rotation of the impeller 15 of the blower 101 generates a flow of air that passes axially through the heat exchanger 105.
  • the left-right width of the base 4 of the motor unit 1 is set narrower than the width of the heat exchanger 105 so as not to impede the flow of air passing through the heat exchanger 105.
  • Figures 5 (A) and (B) are diagrams for explaining the length of the partition section 5.
  • the distance from the surface 41 of the base 4 to the tip of the partition section 5 i.e., the end farthest from the base 4) is defined as the length L1 of the partition section 5.
  • the distance from the surface 41 of the base 4 to the end 31b of the stator core 31 that is farther from the base 4 is defined as L3.Furthermore, the distance from the surface 41 of the base 4 to the end 31a of the stator core 31 on the base 4 side (i.e., the near end) is defined as L2.
  • 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.
  • the partition 5 faces the entire stator core 31 in the radial direction.
  • the partition 5 faces the outer peripheral surface of the motor M in the radial direction outside the entire stator core 31.
  • the length L1 of the partition 5 is equal to or less than the above-mentioned distance L3, and is longer than the distance L2 from the base 4 to the near end 31a of the stator core 31.
  • the partition 5 faces a portion of the stator core 31 in the radial direction.
  • the partition 5 faces the outer peripheral surface of the motor M in the radial direction outside of a portion of the stator core 31.
  • the length L1 of the partition portion 5 in the first embodiment may satisfy L1>L3 as shown in FIG. 5(A), or may satisfy L3 ⁇ L1>L2 as shown in FIG. 5(B). That is, the partition portion 5 needs to be radially opposed to at least a portion of the stator core 31. In other words, the partition portion 5 needs to be radially opposed to the outer peripheral surface of the motor M on the radial outside of at least a portion of the stator core 31.
  • FIG. 6 is a schematic diagram showing the air flow passing through the motor unit 1E of the comparative example.
  • the motor unit 1E of the comparative example differs from the motor unit 1 of the first embodiment in that it does not have a partition portion 5.
  • the air (indicated by arrow A) that reaches the motor unit 1E from the heat exchanger 105 passes through the gap between the opening 43 of the base 4 and the motor M, and flows forward around the motor M. At this time, the air flowing around the motor M dissipates radially outward (i.e., in the direction away from the outer circumferential surface of the motor M), so it is unable to sufficiently remove heat from the motor M, and the heat dissipation effect of the motor M is low.
  • FIG. 7 is a schematic diagram showing the air flow passing through the motor unit 1 of embodiment 1.
  • the motor unit 1 of embodiment 1 has a partition 5 that faces the outer peripheral surface of the motor M. Therefore, air A that reaches the motor unit 1 from the heat exchanger 105 passes through the gap between the opening 43 of the base 4 and the motor M, and then flows forward through the gap between the motor M and the partition 5 as shown by arrow F.
  • the air flow around the motor M is prevented from escaping radially outward by the partition 5. Because the air flows axially along the outer periphery of the motor M, the heat generated by the coil 32 can be dissipated efficiently.
  • 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.
  • the partition 5 faces the entire stator core 31 in the radial direction. Therefore, air flows in the axial direction along the outer circumferential surface of the motor M, radially outside the entire stator core 31.
  • Heat generated in the coil 32 of the motor M is transferred to the outer circumferential surface of the motor M, i.e., the outer circumferential surface of the molded resin part 33, via the stator core 31. Therefore, air flows in the axial direction along the outer circumferential surface of the motor M on the entire radial outside of the stator core 31, so that the heat generated in the coil 32 can be dissipated particularly efficiently.
  • the first surface 51 of the partition 5 facing the motor M has a curved shape (more specifically, an arc shape centered on the rotation axis Ax), so the distance between the motor M and the partition 5 is constant in the circumferential direction. This makes the distribution of the air flow between the motor M and the partition 5 uniform in the circumferential direction, allowing the heat of the motor M to be dissipated uniformly.
  • Figure 8 is a diagram showing the positional relationship between the motor M and the partition 5 in a plane perpendicular to the rotation axis Ax.
  • the radially outermost position (referred to as the outermost position) Pm of the motor M is indicated by a dashed line.
  • the outermost position Pm of the motor M is the radially outer end of the leg 35 of the motor M.
  • the partition 5 is positioned radially inward from the outermost position Pm of the motor M. If the partition 5 were positioned outward from the outermost position Pm of the motor M, it would be necessary to enlarge the base 4, which would increase the manufacturing costs of the motor unit 1. Furthermore, if the base 4 is enlarged, it would be more difficult for air that flows along the outside of the base 4 in the width direction to reach the motor unit 1.
  • the base 4 By positioning the partition 5 radially inward from the outermost position Pm of the motor M, the base 4 can be made smaller. This reduces manufacturing costs and provides a heat dissipation effect by allowing the air that flows along the outside of the base 4 in the width direction to reach the motor unit 1.
  • the motor unit 1 of the first embodiment includes the motor M having the rotor 2, the stator 3 having the stator core 31 and the coils 32, the base 4 supporting the motor M, and the partition portion 5 provided on the base 4 and radially facing the motor M.
  • the partition portion 5 faces at least a portion of the stator core 31 in the radial direction.
  • the stator core 31 is located on one side of the base 4 in the axial direction. If the axial distance from the base 4 to the tip of the partition 5 on the side farther from the base 4 is L1, and the axial distance from the base 4 to the proximal end 31a of the stator core 31 on the side closer to the base 4 is L2, then the distances L1 and L2 satisfy L1 > L2. Therefore, with a simple configuration, as described above, the partition 5 can be radially opposed to the motor M in at least a portion of the radially outer region of the stator core 31.
  • the distance between the motor M and the partition 5 becomes closer to constant in the circumferential direction, allowing the heat of the motor M to be dissipated even more efficiently.
  • the partition 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 the air that passes outside the base 4 to reach the motor unit 1 and be used for heat dissipation.
  • the motor unit 1 can be constructed with a small number of parts.
  • n partition sections 5 are arranged in the circumferential direction, and the legs 35 of the motor M are positioned between two adjacent partition sections 5, so that the partition sections 5 can be arranged by utilizing the space between the legs 35.
  • the motor M has a molded resin part 33 as a resin part that surrounds the stator core 31 from the radial outside, the heat generated in the coil 32 can be dissipated from the outer periphery of the molded resin part 33.
  • the base 4 has an opening 43 that communicates with the gap between the partition 5 and the motor M, so that the air that reaches the motor unit 1 from the heat exchanger 105 can flow through the gap between the partition 5 and the motor M, dissipating the heat of the motor M.
  • Fig. 9(A) is a front view showing a partition 5A and base 4 of a modified example.
  • Fig. 9(B) is a cross-sectional view taken along line 9B-9B shown in Fig. 9(A).
  • the partition 5 of the first embodiment had a curved shape, but as shown in Figs. 9(A) and (B), the partition 5A of the modified example is flat. That is, both the first surface 51 and the second surface 52 of the partition 5A are flat.
  • Fig. 10(A) is a front view showing a motor unit 1A of embodiment 2.
  • Fig. 10(B) is a cross-sectional view taken along line 10B-10B shown in Fig. 10(A).
  • the partition portion 6 and the base 4 are formed separately.
  • n (n is an integer) partition sections 6 are arranged in the circumferential direction along the outer circumferential surface of the motor M.
  • the number n of partition sections 6 is, for example, four, but is not limited to four and may be one or more.
  • the legs 35 of the motor M are arranged between adjacent partition sections 6 in the circumferential direction.
  • the partition 6 has a wall 61 that extends along the outer circumferential surface of the motor M, and a flange 62 formed at the end of the wall 61 on the base 4 side.
  • the partition 6 is made of a material such as sheet metal, but may be made of other materials.
  • the axial length of the wall portion 61 is the same as the length L1 of the partition portion 5 described in the first embodiment (FIGS. 5(A) and (B)).
  • the wall portion 61 has a curved shape similar to that of the partition portion 5 in the first embodiment, but may also have, for example, a flat shape similar to that of the partition portion 5A of the modified example (FIGS. 9(A) and (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.
  • the screen portion 6 is fixed to the base 4 by passing the screw member 65 through the through hole 63 of the flange portion 62 and screwing it into the screw hole 46 of the base 4.
  • the screw member 37 (FIG. 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 35 of the motor M is also referred to as the first through hole, and the through hole 63 in the flange 62 of the partition 6 is also referred to as the second through hole.
  • FIG. 11(A) is a front view showing the base 4 of the second embodiment.
  • FIG. 11(B) is a cross-sectional view taken along line 11B-11B shown in FIG. 11(A).
  • the base 4 has a screw hole 45 for fixing the motor M, as well as a screw hole 46 for fixing the partition 6.
  • the screw holes 45, 46 are alternately formed around the opening 43.
  • the screw hole 45 is also referred to as the first screw hole
  • the screw hole 46 is also referred to as the second screw hole.
  • the motor unit 1A of the second embodiment is configured similarly to the motor unit 1 of the first embodiment.
  • the partition portion 6 and the base 4 are formed as separate bodies, so the motor M can be attached to the base 4 before the partition portion 6 is attached to the base 4. This simplifies the installation of the motor M to the base 4. In addition, the configuration of the base 4 can be simplified.
  • Fig. 12(A) is a front view showing a motor unit 1B of embodiment 3.
  • Fig. 12(B) is a cross-sectional view taken along line 12B-12B shown in Fig. 12(A).
  • Fig. 12(C) is a schematic diagram showing a partition part 7 of embodiment 3.
  • the partition part 7 and the base 4 are formed separately, and further, the partition part 7 and the motor M are fixed to the base 4 by a common screw member 75.
  • n (n is an integer) partition sections 7 are arranged in the circumferential direction along the outer circumferential surface of the motor M.
  • the number n of partition sections 7 is, for example, four, but is not limited to four and may be one or more.
  • the legs 35 of the motor M are arranged between adjacent partition sections 7 in the circumferential direction.
  • the partition 7 has a wall 71 that extends along the outer circumferential surface of the motor M, and a flange 72 (FIG. 12(B)) formed at the end of the wall 71 on the base 4 side.
  • the partition 7 is made of a material such as sheet metal, but may be made of other materials.
  • the axial length of the wall portion 71 is the same as the length L1 of the partition portion 5 described in the first embodiment (FIGS. 5(A) and (B)).
  • the wall portion 71 has a curved shape similar to that of the partition portion 5 in the first embodiment, but may also have a flat shape similar to that of the partition portion 5A of the modified example (FIGS. 9(A) and (B)).
  • the flange portion 72 is formed to protrude in the circumferential direction from the end of the wall portion 71 on the base 4 side.
  • the flange portion 72 has a through hole 73 through which a screw member 75 for fixing the partition portion 7 to the base 4 passes.
  • 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 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.
  • the legs 35 of the motor M are attached to the base 4 so as to overlap with 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 the legs 35 and the base 4.
  • the motor M and the partition 7 are fixed to the base 4 by passing the screw member 75, which serves as a fixing member, through the through hole 36 of the leg 35 and the through hole 73 of the flange 72 and screwing it into the screw hole 45 of the base 4.
  • Fig. 13 is a front view showing the base 4 of the third embodiment. As shown in Fig. 13, the base 4 has screw holes 45 for fixing the motor M and the partition 7, but does not have dedicated screw holes 46 (Figs. 11(A) and (B)) for fixing the partition 7 as in the second embodiment.
  • the motor unit 1B of the third embodiment is configured similarly to the motor unit 1 of the first embodiment.
  • the partition section 7 and the base 4 can be fixed with a common screw member 75, which reduces the number of screw members and the number of screw holes formed in the base 4. This reduces the manufacturing cost of the motor unit 1B.
  • n (n is an integer) partition sections 8 are arranged in the circumferential direction along the outer circumferential surface of the motor M.
  • the number n of partition sections 8 is, for example, four, but is not limited to four and may be one or more.
  • the legs 35 of the motor M are arranged between adjacent partition sections 8 in the circumferential direction.
  • the partition 8 has a wall 81 that extends along the outer peripheral surface of the motor M, and a flange 82 that is formed at a position a length T away from the end of the wall 81 on the base 4 side.
  • the partition 8 is made of a material such as sheet metal, but may be made of other materials.
  • the axial length of the wall portion 81 is the same as the length L1 of the partition portion 5 described in the first embodiment (FIGS. 5(A) and (B)).
  • the wall portion 81 has a curved shape similar to that of the partition portion 5 in the first embodiment, but may also have a flat shape similar to that of the partition portion 5A of the modified example (FIGS. 9(A) and (B)).
  • the flange portion 82 is formed to protrude circumferentially from a position axially spaced from the axial end of the wall portion 81 by a length T equivalent to the thickness of the leg portion 35 of the motor M.
  • the flange portion 82 has a through hole 83 through which a screw member 85 for fixing the partition portion 8 to the base 4 passes.
  • 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 in the leg portion 35 of the motor M is also referred to as the first through hole
  • the through hole 83 in the flange portion 82 of the partition portion 8 is also referred to as the second through hole.
  • the flange portion 82 of the partition portion 8 is attached to the base 4 so as to overlap with the leg portion 35 of the motor M in the axial direction. More specifically, the flange portion 82 of the partition portion 8 is attached to the base 4 so as to sandwich the leg portion 35 of the motor M between the partition portion 8 and the base 4.
  • the motor M and the partition 8 are fixed to the base 4 by passing the screw members 85 as fixing members through the through holes 83 in the flange 82 and the through holes 36 in the legs 35 and screwing them into the screw holes 45 in the base 4.
  • the arrangement of the screw holes 45 in the base 4 is as shown in FIG. 13 of the third embodiment.
  • the motor unit 1C of the fourth embodiment is configured similarly to the motor unit 1 of the first embodiment.
  • the partition section 8 and the base 4 can be fixed with a common screw member 75, which reduces the number of screw members and the number of screw holes formed in the base 4. This reduces the manufacturing cost of the motor unit 1C.
  • the motor M can be attached to the base 4 before attaching the partition section 8 to the base 4, which simplifies the installation work of the motor M.
  • Fig. 15(A) is a front view showing a motor unit 1D of embodiment 5.
  • Fig. 15(B) is a cross-sectional view taken along line 15B-15B shown in Fig. 15(C).
  • Fig. 15(C) is a perspective view showing a partition 9 of embodiment 5.
  • the motor unit 1D of embodiment 5 has an annular partition 9 and a base 4.
  • a ring-shaped partition portion 9 is provided around the rotation axis Ax so as to surround the motor M.
  • the partition portion 9 has n wall portions 91 arranged circumferentially along the outer circumferential surface of the motor M, and flange portions 92 formed between adjacent wall portions 91.
  • the number n of wall portions 91 is, for example, four, but is not limited to four and may be one or more.
  • the material of the partition portion 9 is, for example, sheet metal, but may be other materials.
  • the axial length of the wall portion 91 is the same as the length L1 of the partition portion 5 described in embodiment 1 (FIGS. 5(A) and (B)).
  • 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.
  • the flange portion 92 is formed to be thicker in the radial direction 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
  • the through hole 93 in the flange portion 92 of the partition portion 9 is also referred to as the second through hole.
  • the legs 35 of the motor M are attached to the base 4 so as to overlap 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 the legs 35 and the base 4.
  • the motor M and the partition 9 are fixed to the base 4 by passing the screw members 95, which serve as fixing members, through the through holes 93 in the flange 92 and the through holes 36 in the legs 35 and screwing them into the screw holes 45 in the base 4.
  • the arrangement of the screw holes 45 in the base 4 is as shown in FIG. 13 of the third embodiment.
  • the motor unit 1D of the fifth embodiment is configured similarly to the motor unit 1 of the first embodiment.
  • the flange portion 92 of the partition portion 9 may be arranged to sandwich the leg portion 35 of the motor M between the base 4, as in the flange portion 82 of the fourth embodiment ( Figure 14 (B)).
  • the partition 9 may also be fixed to the base 4 with a screw member separate from the screw member that fixes the motor M.
  • two types of screw holes 45, 46 (FIG. 11(A)) may be formed in the base 4 as in the third embodiment.
  • the partition 9 may also be formed integrally with the base 4, as in the partition 5 of the first embodiment.
  • the partition portion 9 is formed as a single unit, which reduces the number of parts and simplifies the manufacturing process of the motor unit 1D.
  • FIG. 16 is a diagram showing the configuration of an air conditioner 200 to which the outdoor unit 100 (Fig. 4) of embodiment 1 is applied.
  • the air conditioner 200 includes the outdoor unit 100, an indoor unit 201, and a refrigerant pipe 207 connecting these.
  • the indoor unit 201 has an indoor blower 202.
  • the indoor blower 202 is, for example, a cross-flow fan, and has an impeller 203, a motor 204 that drives the impeller 203, a heat exchanger 205 arranged opposite the impeller 203, and a housing 206 that houses these.
  • the outdoor unit 100 has a blower 101, a heat exchanger 105, a compressor 106, and a pressure reducing device (not shown).
  • the blower 101 has a motor unit 1 and an impeller 15.
  • the heat exchanger 105, compressor 106, and pressure reducing device of the outdoor unit 100, and the heat exchanger 205 of the indoor unit 201 are connected by refrigerant piping 207 to form a refrigerant circuit.
  • the rotation of the motor M of the blower 101 rotates the impeller 15, causing outdoor air to pass through the heat exchanger 105.
  • the air passing through the heat exchanger 105 is cooled by the heat of evaporation being removed from it.
  • the cooled air passes through the motor unit 1 by the rotation of the impeller 15, and is released to the outside through the opening 103 ( Figure 4).
  • the impeller 203 rotates due to the rotation of the motor 204 of the indoor blower 202.
  • the air heated when the refrigerant condenses in the heat exchanger 205 is blown into the room by the rotation of the impeller 203.
  • the air that has passed through the heat exchanger 105 passes through the motor M, allowing the heat of the motor M to be dissipated.
  • the partition section 5 (Fig. 1) facing the motor M is provided, allowing the heat of the motor M to be dissipated efficiently. This allows the blower 101 to operate stably, and the reliability of the air conditioning device 200 to be improved.
  • the motor unit 1 of embodiment 1 may be used.
  • the motor unit 1 is used to drive the blower (i.e., the outdoor blower) 101 of the outdoor unit 100, but it is sufficient that the motor unit 1 is used as the drive source for at least one of the drive sources for the outdoor blower 101 and the indoor blower 202.
  • the motor unit 1 described in each embodiment can also be mounted on electrical equipment other than the blower of an air conditioning system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Motor Or Generator Cooling System (AREA)
PCT/JP2023/012461 2023-03-28 2023-03-28 モータユニット、送風機および空気調和装置 WO2024201701A1 (ja)

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JP2025509324A JPWO2024201701A1 (enrdf_load_stackoverflow) 2023-03-28 2023-03-28

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59123442A (ja) * 1982-12-28 1984-07-17 Matsushita Electric Ind Co Ltd 電動機器
JPS62197408U (enrdf_load_stackoverflow) * 1986-06-09 1987-12-15
JPH06341659A (ja) * 1993-04-09 1994-12-13 Daikin Ind Ltd 空気調和装置
JPH07102970A (ja) * 1993-10-01 1995-04-18 Aisin Seiki Co Ltd 車両用送風機
JPH07180697A (ja) * 1993-12-24 1995-07-18 Fuji Electric Co Ltd 軸流送風機
WO2023286117A1 (ja) * 2021-07-12 2023-01-19 三菱電機株式会社 モータ、送風機および空気調和装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59123442A (ja) * 1982-12-28 1984-07-17 Matsushita Electric Ind Co Ltd 電動機器
JPS62197408U (enrdf_load_stackoverflow) * 1986-06-09 1987-12-15
JPH06341659A (ja) * 1993-04-09 1994-12-13 Daikin Ind Ltd 空気調和装置
JPH07102970A (ja) * 1993-10-01 1995-04-18 Aisin Seiki Co Ltd 車両用送風機
JPH07180697A (ja) * 1993-12-24 1995-07-18 Fuji Electric Co Ltd 軸流送風機
WO2023286117A1 (ja) * 2021-07-12 2023-01-19 三菱電機株式会社 モータ、送風機および空気調和装置

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