WO2023188813A1 - Soufflante et corps mobile - Google Patents

Soufflante et corps mobile Download PDF

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Publication number
WO2023188813A1
WO2023188813A1 PCT/JP2023/003536 JP2023003536W WO2023188813A1 WO 2023188813 A1 WO2023188813 A1 WO 2023188813A1 JP 2023003536 W JP2023003536 W JP 2023003536W WO 2023188813 A1 WO2023188813 A1 WO 2023188813A1
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WO
WIPO (PCT)
Prior art keywords
fan
blower
case
motor case
motor
Prior art date
Application number
PCT/JP2023/003536
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English (en)
Japanese (ja)
Inventor
将 小山
峰明 磯田
英明 森
浩二 久山
Original Assignee
パナソニックＩｐマネジメント株式会社
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.)
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Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2023188813A1 publication Critical patent/WO2023188813A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer

Definitions

  • the present disclosure relates to a blower and a moving body.
  • Centrifugal blowers installed in moving bodies such as automobiles are conventionally known.
  • This type of blower includes a fan unit and a motor unit attached to the fan unit (see Patent Document 1, etc.).
  • the fan unit includes a centrifugal fan and a fan case that accommodates the centrifugal fan.
  • the motor unit includes a rotor, a stator, and a motor case that houses them.
  • An object of the present disclosure is to provide a blower and a moving body that can improve heat dissipation of a motor unit.
  • a blower includes a fan unit and a motor unit attached to the fan unit.
  • the fan unit includes a centrifugal fan and a fan case that accommodates the centrifugal fan.
  • the motor unit includes a rotor including a rotating shaft connected to the centrifugal fan, a stator that rotates the rotor, and a motor case that accommodates the rotor and the stator.
  • the fan case has an opening for inserting a portion of the motor case into the fan case.
  • a gap connected to the opening is formed between the fan case and the motor case. The gap constitutes at least a portion of a ventilation path that communicates the inside of the fan case with an external space through the opening.
  • a moving object includes the blower, an object to be cooled by the blower, and a vehicle body on which the blower and the object to be cooled are mounted.
  • the present disclosure has the effect of increasing the heat dissipation of the motor unit included in the blower.
  • FIG. 1 is a plan view of a blower according to one embodiment.
  • FIG. 2 is a cross-sectional view taken along line AA in FIG.
  • FIG. 3 is an enlarged view of the main part of FIG. 2.
  • FIG. 4 is a side view of the blower same as above.
  • FIG. 5 is a sectional view taken along line BB in FIG. 4 showing a side view of the blower.
  • FIG. 6 is a sectional view taken along line CC in FIG. 4.
  • FIG. 7 is an exploded perspective view of the same blower.
  • FIG. 8A is a perspective view of a substrate holder included in the blower.
  • FIG. 8B is a perspective view of a heat sink included in the blower.
  • FIG. 8C is a perspective view of an insulating sheet included in the blower.
  • FIG. 8D is a perspective view of a circuit board included in the blower.
  • FIG. 9 is a conceptual diagram of a moving body equipped with the same blower.
  • FIG. 10A is a sectional view of a main part of a blower according to a first modification.
  • FIG. 10B is a sectional view of a main part of a blower according to a second modification.
  • FIG. 11A is a sectional view of a main part of a blower according to a third modification.
  • FIG. 11B is a sectional view of a main part of a blower according to a fourth modification.
  • FIG. 12 is a plan view of a blower according to a fifth modification.
  • FIG. 13 is a sectional view taken along the line DD in FIG. 12.
  • FIG. 14 is a plan view of a centrifugal fan included in the blower of the fifth modification.
  • FIG. 15 is a sectional view of a blower according to a sixth modification.
  • blower 1 according to one embodiment will be described in detail based on the accompanying drawings.
  • the blower 1 of one embodiment is suitably mounted on a moving object 9 such as an automobile (see FIG. 9, which will be described later).
  • a moving object 9 such as an automobile
  • FIG. 9, which will be described later the blower 1 of one embodiment is suitably mounted on a moving object 9 such as an automobile (see FIG. 9, which will be described later).
  • it can also be installed in other devices such as home appliances.
  • FIG. 1 is a plan view of a blower 1 according to an embodiment.
  • FIG. 2 is a cross-sectional view taken along line AA in FIG.
  • FIG. 4 is a side view of the blower 1 of the embodiment.
  • the blower 1 of one embodiment includes a fan unit 12 and a motor unit 14.
  • the fan unit 12 and motor unit 14 are assembled integrally.
  • the motor unit 14 has a smaller external shape than the fan unit 12.
  • Planar view here means the case seen in the direction along the axis C2 of the centrifugal fan 2 included in the fan unit 12.
  • the fan unit 12 is a centrifugal fan unit.
  • the fan unit 12 is configured to take in air along the axis C2 of the centrifugal fan 2 and exhaust air in a direction intersecting the axis C2 (in one embodiment, in a direction perpendicular to the axis C2).
  • the direction in which the motor unit 14 is positioned relative to the fan unit 12 matches the direction in which the fan unit 12 takes in air.
  • a part of the motor unit 14 is inserted inside the fan unit 12 in a state where the fan unit 12 and the motor unit 14 are assembled together.
  • Part of the motor unit 14 here includes a part 66 of the motor case 6, which will be described later.
  • the fan unit 12 includes a centrifugal fan 2 and a fan case 3 that rotatably accommodates the centrifugal fan 2.
  • the centrifugal fan 2 and fan case 3 are made of resin.
  • the centrifugal fan 2 may be made of metal.
  • the fan case 3 may be made of metal.
  • Centrifugal fan 2 includes a hub 21 and a plurality of blades 23.
  • the centrifugal fan 2 is a sirocco fan.
  • first direction D1 the direction of the first side of the centrifugal fan 2 along the axis C2
  • second direction D2 the direction of the second side of the centrifugal fan 2 along the axis C2 (the direction opposite to the direction of the first side) is referred to as a second direction D2.
  • the hub 21 has a concave shape in the first direction D1. With the fan unit 12 and the motor unit 14 assembled together, a portion 66 of the motor case 6 is disposed inside the recess that the hub 21 has.
  • the center of the hub 21 is located closest to the first direction D1 of the entire hub 21.
  • the hub 21 includes a connecting portion 215 that constitutes a central portion of the hub 21 .
  • the connecting portion 215 is a cylindrical portion into which one end of the rotating shaft 514 in the axial direction (axial direction) is fitted.
  • the connecting portion 215 is open in the second direction D2.
  • the axis C2 of the centrifugal fan 2 is formed to pass through the center of the hub 21 (in other words, the connecting portion 215).
  • the hub 21 further includes a bottom wall portion 216, a peripheral wall portion 217, and a flange portion 218.
  • the bottom wall portion 216 is positioned so as to surround the entire circumference of the connecting portion 215 in plan view.
  • the peripheral wall portion 217 is positioned so as to surround the entire circumference of the bottom wall portion 216 in a plan view.
  • the flange portion 218 is positioned so as to surround the entire circumference of the peripheral wall portion 217 in a plan view.
  • the connecting portion 215, the bottom wall portion 216, the peripheral wall portion 217, and the flange portion 218 of the hub 21 are formed continuously in this order outward in the radial direction of the hub 21.
  • the bottom wall portion 216 extends outward in the radial direction of the hub 21 from the outer peripheral portion of the connecting portion 215.
  • the entire bottom wall portion 216 is inclined such that the further away from the axis C2 the portion is located on the second direction D2 side.
  • the peripheral wall portion 217 extends outward in the radial direction of the hub 21 from the outer peripheral edge of the bottom wall portion 216 .
  • the entire peripheral wall portion 217 is inclined such that a portion farther from the axis C2 is located toward the second direction D2.
  • the slope of the peripheral wall portion 217 and the slope of the bottom wall portion 216 are different from each other.
  • the angle of inclination of the peripheral wall portion 217 with respect to the axis C2 is smaller than the angle of inclination of the bottom wall portion 216 with respect to the axis C2.
  • the flange portion 218 extends radially outward from the outer peripheral edge of the peripheral wall portion 217 of the hub 21 .
  • Each blade 23 is provided integrally with the flange portion 218 of the hub 21. Each blade 23 extends from the flange portion 218 in a first direction D1. Each blade 23 has an arcuate outer shape in plan view. Each blade 23 includes an inner circumferential end near the axis C2 and an outer circumferential end far from the axis C2. The plurality of blades 23 are arranged at equal intervals in the circumferential direction surrounding the axis C2.
  • the fan case 3 will be explained.
  • the fan case 3 has an intake port 34 for sucking in outside air, a discharge port 35 for discharging air toward the external space, and a flow path 36 connecting the intake port 34 and the discharge port 35.
  • the intake port 34 has a circular shape
  • the discharge port 35 has a rectangular shape.
  • the fan case 3 includes a first member 31 and a second member 32.
  • the first member 31 forms a half of the fan case 3.
  • the second member 32 forms another half of the fan case 3.
  • the fan case 3 is configured by fitting the first member 31 and the second member 32 together.
  • the first member 31 constitutes a half of the fan case 3 on the first direction D1 side.
  • the second member 32 constitutes a half of the fan case 3 on the second direction D2 side.
  • the intake port 34 is included in the first member 31.
  • the intake port 34 is open in a first direction D1.
  • the discharge port 35 is open in a direction intersecting the axis C2 (in one embodiment, in a direction perpendicular to the axis C2).
  • the discharge port 35 is formed when the first member 31 and the second member 32 are fitted together.
  • the flow path 36 forms a spiral surrounding the centrifugal fan 2 .
  • the flow path 36 is formed when the first member 31 and the second member 32 are fitted together.
  • the fan case 3 further includes a connecting portion 33 for connecting the motor unit 14.
  • the connecting portion 33 is included in the second member 32. When the first member 31 and the second member 32 are fitted together, the connecting portion 33 included in the second member 32 is located opposite to the intake port 34 included in the first member 31.
  • the connecting portion 33 includes a wall portion 38 located at a position facing the intake port 34, and a connection opening 30 surrounded by the wall portion 38 (see also FIG. 7).
  • FIG. 7 is an exploded perspective view of the blower 1 of one embodiment.
  • the opening 30 is a circular opening located opposite the intake port 34.
  • the axis C2 of the centrifugal fan 2 is set to pass through the center of the opening 30.
  • the opening 30 is an opening for inserting a part 66 of the motor case 6 forming the outer shell of the motor unit 14 (in other words, a part of the motor unit 14) into the inside of the fan case 3.
  • the wall portion 38 is located around the opening 30.
  • the opening 30 is constituted by a hole passing through the center of the wall portion 38.
  • Wall portion 38 includes an annular portion 380 surrounding opening 30 .
  • Portion 380 has a surface 380a (see also FIG. 3).
  • FIG. 3 is an enlarged view of the main part of FIG. 2.
  • the direction of the surface 380a is the second direction D2.
  • the surface 380a is an annular flat surface.
  • the connecting portion 33 further includes a protrusion 39 located surrounding the opening 30 and the wall portion 38.
  • the protrusion 39 is a rib-shaped portion included in the second member 32.
  • the protrusion 39 protrudes in the second direction D2.
  • the motor unit 14 is composed of a so-called inner rotor type brushless motor.
  • the motor unit 14 includes an electric mechanism 5 for rotating the centrifugal fan 2 and a motor case 6 that houses the electric mechanism 5.
  • the rotating shaft 514 is included in the electric mechanism 5.
  • Motor case 6 is made of metal.
  • the motor case 6 may be made of resin.
  • the axial direction in which the axial center of the rotating shaft 514 extends is a direction along the axial center C4 of the rotating shaft 514.
  • the orientation of the first side of the rotating shaft 514 along the axis C4 matches the orientation of the first side of the centrifugal fan 2 along the axis C2. That is, the orientation of the first side is the first orientation D1.
  • the direction of the second side of the rotating shaft 514 along the axis C4 matches the direction of the second side of the centrifugal fan 2 along the axis C2. That is, the direction of the second side is the second direction D2.
  • the end of the rotating shaft 514 in the first direction D1 is fitted into the connecting portion 215 of the centrifugal fan 2, so that the rotating shaft 514 and the centrifugal fan 2 are rotatably fixed as one unit.
  • the motor case 6 is constructed by fitting a first member 61 and a second member 62 together.
  • the first member 61 has an opening opened in the second direction D2.
  • the opening is closed by a lid-like second member 62.
  • a bearing 681 is arranged on the first member 61 .
  • a bearing 682 is arranged on the second member 62.
  • the bearing 681 rotatably supports the axially intermediate portion of the rotating shaft 514.
  • the bearing 682 rotatably supports the end of the rotating shaft 514 in the second direction D2.
  • the motor case 6 includes a small diameter portion 63 and a large diameter portion 64.
  • the small diameter portion 63 is a cylindrical portion.
  • the small diameter portion 63 constitutes the end of the motor case 6 in the first direction D1.
  • the large diameter portion 64 is continuous with the small diameter portion 63 via a step.
  • the large diameter portion 64 is a cylindrical portion having a larger diameter than the small diameter portion 63.
  • a small diameter portion 63 and a large diameter portion 64 are included in the first member 61 .
  • a portion 66 of the motor case 6 inserted into the inside of the fan case 3 includes at least a portion of the small diameter portion 63.
  • the large diameter portion 64 has a surface 64a.
  • the direction of the surface 64a is the first direction D1.
  • the surface 64a is an annular flat surface. When the fan unit 12 and the motor unit 14 are assembled together, a surface 64a forming a part of the outer surface of the motor case 6 is located along the fan unit 12. The surface 64a is positioned with a slight gap from the fan unit 12.
  • the electric mechanism 5 housed in the motor case 6 includes a rotor 51 and a stator 53.
  • Rotor 51 includes a rotor core 511 in which magnets are arranged, and a rotating shaft 514 connected to rotor core 511. An end of the rotating shaft 514 in the first direction D1 protrudes to the outside of the motor case 6. The remaining portion of the rotating shaft 514 is housed in the motor case 6.
  • the stator 53 includes a stator core 531 and a winding 533 wound around the stator core 531.
  • the stator 53 is arranged radially outward with respect to the rotor 51.
  • the stator 53 is configured to supply magnetic force to rotate the rotor 51.
  • Stator core 531 includes a plurality of stacked electromagnetic steel plates.
  • the circuit board 57 is configured to control energization to the stator 53.
  • the circuit board 57 is arranged closer to the second direction D2 than the rotor 51 and the stator 53.
  • the rotor 51 and stator 53 are arranged inside the small diameter portion 63 of the motor case 6. That is, the rotor 51 and the stator 53 are housed in a portion 66 of the motor case 6 that is inserted into the fan case 3 through the opening 30. Stator 53 can conduct heat to a portion 66 of motor case 6 .
  • the stator 53 and a portion 66 of the motor case 6 are thermally coupled. More specifically, the outer circumferential surface of the stator core 531 is in thermally conductive contact with the inner circumferential surface of a portion 66 of the motor case 6 (see FIG. 5).
  • FIG. 5 is a sectional view taken along line BB in FIG. 4 showing a side view of the blower 1.
  • a portion 66 of the motor case 6 and the stator core 531 may be thermally coupled through direct contact, or may be thermally coupled via a thermally conductive member.
  • the stator 53 is in contact with the inner peripheral surface of the small diameter portion 63 of the motor case 6.
  • the heat transferred from the stator 53 to the motor case 6 can be dissipated, for example, through the outer peripheral surface of the small diameter portion 63.
  • the small diameter portion 63 of the motor case 6 and the stator core 531 may be thermally coupled through direct contact, or may be thermally coupled via a thermally conductive member.
  • the electric mechanism 5 further includes a board holder 54, a heat sink 55, an insulating sheet 56, and a circuit board 57.
  • the substrate holder 54 is arranged closer to the second direction D2 than the rotor 51 and stator 53.
  • the substrate holder 54 has an annular shape in plan view (see FIG. 8A).
  • FIG. 8A is a perspective view of the substrate holder 54 included in the blower 1 of one embodiment.
  • the outer diameter of the substrate holder 54 is larger than the outer diameter of the stator 53.
  • the outer diameter of the board holder 54 is larger than the outer diameter of the small diameter portion 63 of the motor case 6.
  • the heat sink 55 is arranged closer to the second direction D2 than the substrate holder 54.
  • the heat sink 55 has an annular shape in plan view (see FIGS. 6 and 8B).
  • FIG. 6 is a cross-sectional view taken along line CC in a side view of the blower 1 of the embodiment shown in FIG.
  • FIG. 8B is a perspective view of the heat sink 55 included in the blower 1 of one embodiment.
  • the heat sink 55 is made of metal.
  • the outer diameter of the heat sink 55 is larger than the outer diameter of the stator 53.
  • the outer diameter of the heat sink 55 is larger than the outer diameter of the small diameter portion 63 of the motor case 6.
  • the substrate holder 54 and the heat sink 55 are positioned to overlap.
  • the insulating sheet 56 is arranged closer to the second direction D2 than the heat sink 55.
  • the insulating sheet 56 has an annular shape in plan view (see FIG. 8C).
  • FIG. 8C is a perspective view of the insulating sheet 56 included in the blower 1 of one embodiment.
  • the outer diameter of the insulating sheet 56 is larger than the outer diameter of the stator 53.
  • the outer diameter of the insulating sheet 56 is larger than the outer diameter of the small diameter portion 63 of the motor case 6.
  • the inner diameter of the insulating sheet 56 is smaller than the inner diameter of the substrate holder 54.
  • the inner diameter of the insulating sheet 56 is smaller than the inner diameter of the heat sink 55.
  • the radially outer portion of the insulating sheet 56 is located overlapping the substrate holder 54 and the heat sink 55.
  • the circuit board 57 is arranged closer to the second direction D2 than the insulating sheet 56.
  • the circuit board 57 has an annular shape in plan view (see FIG. 8D).
  • FIG. 8D is a perspective view of the circuit board 57 included in the blower 1 of one embodiment.
  • the outer diameter of the circuit board 57 is larger than the outer diameter of the stator 53.
  • the outer diameter of the circuit board 57 is larger than the outer diameter of the small diameter portion 63 of the motor case 6.
  • the inner diameter of the circuit board 57 is smaller than the inner diameter of the board holder 54.
  • the inner diameter of the circuit board 57 is smaller than the inner diameter of the heat sink 55.
  • the inner diameter of the circuit board 57 is smaller than the inner diameter of the insulating sheet 56.
  • the radially outer portion of the circuit board 57 is located overlapping the board holder 54, the heat sink 55, and the insulating sheet 56.
  • the board holder 54, the heat sink 55, the insulating sheet 56, and the circuit board 57 are arranged inside the large diameter portion 64 of the motor case 6. That is, the board holder 54, the heat sink 55, the insulating sheet 56, and the circuit board 57 are housed in a portion 67 of the motor case 6 that is located closer to the second direction D2 than the portion 66.
  • the portion 67 is a portion of the motor case 6 that is not inserted into the inside of the fan case 3 when the fan unit 12 and the motor unit 14 are assembled together.
  • the substrate holder 54, the heat sink 55, the insulating sheet 56, and the circuit board 57 are positioned overlapping in this order.
  • the heat sink 55 can conduct heat to the portion 67 of the motor case 6.
  • the circuit board 57 can conduct heat to a portion 67 of the motor case 6 via the insulating sheet 56 and the heat sink 55.
  • the heat sink 55 is in contact with the inner peripheral surface of the large diameter portion 64 of the motor case 6 .
  • the heat transferred from the circuit board 57 to the motor case 6 via the insulating sheet 56 and the heat sink 55 can be dissipated, for example, through the outer peripheral surface 64b of the large diameter portion 64 (see FIG. 3).
  • a gap 4 is formed between the fan unit 12 and the motor unit 14 when the fan unit 12 and the motor unit 14 are assembled together.
  • the gap 4 is a small gap formed between the fan case 3 forming the outer shell of the fan unit 12 and the motor case 6 forming the outer shell of the motor unit 14.
  • the gap 4 is, for example, about 0.8 mm.
  • the gap 4 is preferably a gap of 5 mm or less. It is more preferable that the gap 4 is a gap of 3 mm or less.
  • the gap 4 is provided so as to be connected to the opening 30 of the fan case 3 and to the external space of the blower 1.
  • the gap 4 constitutes at least a portion of a ventilation path 7 that communicates the inside of the fan case 3 with an external space through the opening 30 of the fan case 3.
  • the gap 4 constitutes the entire air passage 7.
  • the ventilation path 7 is formed between the wall portion 38 of the fan case 3 and the motor case 6.
  • Wall portion 38 includes a portion 380 that faces motor case 6 in the axial direction of rotating shaft 514 .
  • a flat surface 380a of the portion 380 and a flat surface 64a of the large diameter portion 64 of the motor case 6 are located opposite to each other in the axial direction of the rotating shaft 514.
  • a ventilation path 7 is formed between the surface 380a of the fan case 3 and the surface 64a of the motor case 6.
  • the width of the ventilation passage 7 in the axial direction of the rotating shaft 514 is, for example, about 0.8 mm.
  • the width of the ventilation passage 7 in the axial direction of the rotating shaft 514 is preferably a gap of 5 mm or less.
  • the width of the ventilation passage 7 in the axial direction of the rotating shaft 514 is more preferably a gap of 3 mm or less.
  • the heat generated by the motor unit 14 during operation can be effectively dissipated by the air flow in the ventilation path 7 that is generated as the centrifugal fan 2 rotates.
  • the inside of the fan case 3 becomes negative pressure, and a flow of air from the external space toward the inside of the fan case 3 is generated through the ventilation path 7.
  • the air flows along the outer circumference of the motor case 6.
  • the air flows along the outer surface of a portion 67 of the motor case 6 that is not inserted into the fan case 3.
  • the air flows along the outer peripheral surface 64b of the large diameter portion 64 of the motor case 6, and flows along the surface 64a of the large diameter portion 64.
  • the heat generated in the circuit board 57 is transmitted to the outer peripheral surface 64b of the large diameter portion 64 of the motor case 6 via the insulating sheet 56 and the heat sink 55. Heat generated in the circuit board 57 is efficiently dissipated by air flowing along the outer peripheral surface 64b.
  • the heat generated in the stator 53 is transmitted to the outer peripheral surface of the small diameter portion 63 of the motor case 6. Heat generated in the stator 53 is efficiently dissipated by air flowing along the outer peripheral surface of the small diameter portion 63.
  • the flow of air generated in the ventilation path 7 may be reversed depending on the structure of the blower 1 or various driving conditions. Even in this case (that is, even if air flows from the inside of the fan case 3 toward the outside space through the air passage 7), the heat generated in the stator 53 is absorbed by the outer peripheral surface of the small diameter portion 63. The heat generated in the circuit board 57 is efficiently dissipated by the air flowing along the outer peripheral surface 64b of the large diameter portion 64.
  • FIG. 9 is a conceptual diagram of a mobile body 9 equipped with the blower 1 of one embodiment.
  • the moving body 9 includes a blower 1, an object 91 to be cooled by the blower 1, and a vehicle body 97 on which the blower 1 and the object 91 to be cooled are mounted.
  • the object to be cooled 91 is, for example, a battery 92.
  • the moving body 9 is a hybrid four-wheel vehicle that includes a plurality of wheels 93 and an engine 94 and a motor 95 for rotationally driving the plurality of wheels 93.
  • Battery 92 is configured to supply power to motor 95.
  • the mobile object 9 may be, for example, another type of four-wheeled vehicle such as an electric vehicle.
  • the moving body 9 on which the blower 1 is mounted is not limited to a four-wheeled vehicle.
  • the moving object 9 may be a vehicle (automobile) such as a two-wheeled vehicle or a three-wheeled vehicle.
  • the object to be cooled 91 may be a part other than the battery 92.
  • FIG. 10A is a sectional view of a main part of a blower 1 of a first modified example.
  • the wall portion 38 of the fan case 3 extends from the portion 380 along the axial direction of the rotating shaft 514 (see FIG. 2). It includes two extended portions 381 and 382 that are extended.
  • one of the two extension parts 381 and 382 will be referred to as a first extension part 381, and the other of the two extension parts 381 and 382 will be referred to as a second extension part 382.
  • the first extension portion 381 is a portion of the portion 380 that extends in the first direction D1 from a portion on the inner peripheral side near the opening 30.
  • the first extension portion 381 has a cylindrical shape, for example.
  • the first extension portion 381 is positioned to surround a portion 66 of the motor case 6 inserted into the inside of the fan case 3.
  • the first extension portion 381 is positioned with a slight clearance from the portion 66 of the motor case 6.
  • the gap here is, for example, about 0.8 mm.
  • the gap is preferably 5 mm or less. More preferably, the gap is 3 mm or less.
  • the first extension portion 381 is located along at least a portion of the ventilation path 7 (in the first modification, a portion 71 of the ventilation path 7, which will be described later).
  • the second extension portion 382 is a portion of the portion 380 that extends in the second direction D2 from a portion of the portion 380 on the outer peripheral side away from the opening 30.
  • the direction in which the second extension part 382 is extended and the direction in which the first extension part 381 is extended are opposite to each other.
  • the second extension portion 382 has a cylindrical shape, for example.
  • the second extension portion 382 is formed integrally with the protrusion 39 . However, the second extension portion 382 and the protrusion 39 may be formed separately.
  • the second extension portion 382 is positioned to surround a portion 67 of the motor case 6 that is not inserted into the fan case 3 .
  • the second extension portion 382 is positioned with a slight gap from the portion 67 of the motor case 6.
  • the gap here is, for example, about 0.8 mm.
  • the gap is preferably 5 mm or less. More preferably, the gap is 3 mm or less.
  • a portion 71 of the ventilation path 7 is formed along a portion 691 of the motor case 6 through which heat is transferred from the stator 53.
  • the portion 691 is a portion with which the stator 53 contacts in a thermally conductive manner.
  • Portion 691 is located on the radially outer side of stator 53 .
  • Stator 53 and portion 691 of motor case 6 are thermally coupled.
  • the stator 53 is thermally coupled to a portion 71 of the air passage 7 .
  • Portion 691 of motor case 6 and stator core 531 may be thermally coupled by direct contact.
  • Portion 691 of motor case 6 and stator core 531 may be thermally coupled with a thermally conductive member interposed therebetween.
  • another portion 72 of the ventilation path 7 is formed along a portion 692 of the motor case 6 where heat is transferred from the circuit board 57.
  • the portion 692 is a portion with which the heat dissipation plate 55 contacts in a heat conductive manner.
  • the portion 692 is located on the outside of the heat sink 55 in the radial direction.
  • the circuit board 57 and the portion 692 of the motor case 6 are thermally coupled.
  • Portion 691 of motor case 6 and stator core 531 may be thermally coupled with a thermally conductive member such as heat sink 55 interposed therebetween.
  • Portion 691 of motor case 6 and stator core 531 may be thermally coupled by direct contact.
  • a portion 71 of the ventilation passage 7 is located closer to the first direction D1 than another portion 72.
  • a portion 71 of the ventilation passage 7 is located closer to the axis C4 of the rotating shaft 514 than another portion 72.
  • the ventilation path 7 including a portion 71 and another portion 72 is continuous in a crank shape in a cross section passing through the axis C4 of the rotating shaft 514.
  • FIG. 10B is a sectional view of a main part of a blower 1 of a second modified example.
  • the wall portion 38 of the fan case 3 includes, in addition to an annular portion 380 surrounding the opening 30, an extension portion 382 extending from the portion 380 along the axial direction of the rotating shaft 514. including.
  • the extension portion 382 basically has the same configuration as the second extension portion 382 of the first modification.
  • the extension portion 382 differs from the first modification in the following points.
  • the distance between the second extension portion 382 of the wall portion 38 and the motor case 6 (the distance in the radial direction of the rotating shaft 514) is the same as that between the portion 380 of the wall portion 38 and the motor case 6. (distance in the axial direction of the rotating shaft 514).
  • a portion 72 of the ventilation path 7 constitutes a narrow portion 75 that is narrower than another portion of the ventilation path 7.
  • the narrow portion 75 is formed along a portion 692 of the motor case 6 through which heat is transferred from the circuit board 57 .
  • the portion 692 is a portion with which the heat sink 55 contacts in a heat conductive manner, and is located on the outside of the heat sink 55 in the radial direction.
  • FIG. 11A is a sectional view of essential parts of a blower 1 according to a third modified example.
  • the wall portion 38 of the fan case 3 includes, in addition to the annular portion 380 surrounding the opening 30, an extension portion extending from this portion 380 along the axial direction of the rotating shaft 514. Contains 381.
  • the extension portion 381 basically has the same configuration as the first extension portion 381 of the first modification. However, the extension portion 381 differs from the first modification in the following points.
  • the distance between the first extended portion 381 of the wall portion 38 and the motor case 6 (the distance in the radial direction of the rotating shaft 514) is the same as that between the portion 380 of the wall portion 38 and the motor case 6. (distance in the axial direction of the rotating shaft 514).
  • a portion 71 of the ventilation path 7 constitutes a narrow portion 75 that is narrower than another portion of the ventilation path 7.
  • the narrow portion 75 is formed along a portion 691 of the motor case 6 through which heat is transferred from the stator 53.
  • the portion 691 is a portion with which the stator 53 contacts in a thermally conductive manner.
  • Portion 691 is located on the radially outer side of stator 53 .
  • FIG. 11B is a sectional view of a main part of a blower 1 according to a fourth modification.
  • the wall portion 38 of the fan case 3 includes a first extension portion 381 and a second extension portion 382 in addition to an annular portion 380 surrounding the opening 30 .
  • the first extension part 381 and the second extension part 382 basically have the same configuration as the first extension part 381 and the second extension part 382, respectively, of the first modification.
  • the first extension portion 381 and the second extension portion 382 of the fourth modification differ from the first modification in the following points.
  • the distance between the first extension portion 381 of the wall portion 38 and the motor case 6 (the distance in the radial direction of the rotating shaft 514) is the same as that between the portion 380 of the wall portion 38 and the motor case 6. (distance in the axial direction of the rotating shaft 514).
  • the distance between the second extension portion 382 of the wall portion 38 and the motor case 6 (the distance in the radial direction of the rotation shaft 514) is the same as the distance between the portion 380 of the wall portion 38 and the motor case 6 (the distance in the radial direction of the rotation shaft 514). 514).
  • parts 71 and 72 of the ventilation passage 7 constitute a narrow portion 75 that is narrower than another part of the ventilation passage 7. That is, one narrow portion 75 included in the ventilation path 7 is formed along a portion 691 of the motor case 6 through which heat is transferred from the stator 53.
  • the portion 691 is a portion with which the stator 53 contacts in a thermally conductive manner.
  • Portion 691 is located on the radially outer side of stator 53 .
  • Another narrow portion 75 included in the ventilation path 7 is formed along a portion 692 of the motor case 6 through which heat is transferred from the circuit board 57.
  • the portion 692 is a portion with which the heat dissipation plate 55 contacts in a heat conductive manner.
  • the portion 692 is located on the outside of the heat sink 55 in the radial direction.
  • FIGS. 12 to 14 show a blower 1 of a fifth modification.
  • FIG. 12 is a plan view of the blower 1 of the fifth modification.
  • FIG. 13 is a sectional view taken along the line DD in FIG. 12.
  • FIG. 14 is a plan view of the centrifugal fan 2 included in the blower 1 of the fifth modification.
  • the configuration of the centrifugal fan 2 described below is different from the above-described embodiment.
  • the hub 21 of the centrifugal fan 2 has a plurality of vents 25.
  • the plurality of vent holes 25 are located in the hub 21 at equal intervals in the circumferential direction surrounding the axis C2.
  • the plurality of vent holes 25 are six vent holes 25.
  • each vent 25 is formed in an arc shape centered on the axis C2.
  • Each vent 25 is a hole that penetrates the hub 21 along the axial direction of the centrifugal fan 2 .
  • the axial direction of the centrifugal fan 2 is a direction along the axial center C2 of the centrifugal fan 2.
  • the hub 21 includes a radially inner half 211 (hereinafter referred to as the “inner half 211") of the hub 21 that is closer to the axis C2, and a radially outer half 213 (hereinafter referred to as “the inner half 211") of the hub 21 that is farther from the axis C2. It can be conceptually divided into two parts (“outer half 213"). The inner half 211 and the outer half 213 included in the hub 21 are provided continuously with each other.
  • the radius centered on the axis C2 of the inner half 211 of the hub 21 can be defined as, for example, 1/2 of the radius centered on the axis C4 of the motor unit 14.
  • the outer half 213 of the hub 21 can be defined as the portion of the hub 21 excluding the inner half 211. The distance of any portion included in the outer half portion 213 from the axis C2 is greater than 1/2 of the radius of the motor unit 14.
  • the outer half 213 of the hub 21 has a plurality of vent holes 25 .
  • Each vent hole 25 is provided at the outer peripheral edge portion of the bottom wall portion 216 of the hub 21 .
  • only some of the plurality of vent holes 25 may be provided at the outer peripheral edge portion of the bottom wall portion 216.
  • All or part of the plurality of vent holes 25 may be provided in other parts of the bottom wall portion 216.
  • All or part of the plurality of vent holes 25 may be provided in the peripheral wall portion 217 of the hub 21. All or part of the plurality of vent holes 25 may be provided over a part of the bottom wall part 216 and a part of the peripheral wall part 217.
  • each vent 25 is open toward a portion 66 of the motor case 6 inserted inside the fan case 3.
  • Each vent 25 is open toward a radially outer portion of a portion 66 of the motor case 6 .
  • each vent 25 is open toward the small diameter portion 63 of the motor case 6.
  • Each vent 25 is open toward a radially outer portion of the small diameter portion 63 of the motor case 6 .
  • FIG. 12 when the blower 1 of the fifth modification is viewed in the second direction D2, a portion of the small diameter portion 63 of the motor case 6 is exposed through each vent 25 of the centrifugal fan 2.
  • the heat generated by the motor unit 14 during operation is absorbed by the air flow inside the fan case 3 that is generated through each vent 25 of the centrifugal fan 2 as the centrifugal fan 2 rotates. , can be effectively dissipated.
  • the air flows in the second direction D2 along the outer circumference of the portion 66 of the motor case 6.
  • the air at this time is then guided to the discharge port 35 along the flow path 36 of the fan case 3.
  • the air that has flowed in the second direction D2 through the plurality of vents 25 of the centrifugal fan 2 flows along the outer circumferential portion of the small diameter portion 63 of the motor case 6 .
  • This air is then guided along the flow path 36 of the fan case 3 to the discharge port 35.
  • the heat generated in the stator 53 is transmitted to the outer peripheral surface of the portion 66 of the motor case 6.
  • the heat generated in the stator 53 is also efficiently dissipated by the air flowing through each vent 25.
  • FIG. 15 is a sectional view of a blower 1 according to a sixth modification example.
  • the blower 1 according to the sixth modification example is the same as the blower 1 according to the fifth modification example, but further includes radiation fins 65.
  • the heat radiation fins 65 are provided on the outer surface of the motor case 6.
  • the radiation fins 65 are provided on the outer surface of a portion 66 of the motor case 6 inserted into the fan case 3 .
  • the radiation fins 65 are provided on the outer peripheral surface of the small diameter portion 63 of the motor case 6 .
  • the radiation fin 65 includes, for example, a plurality of plates 651 extending along the axis C2. It is preferable that the plurality of plates 651 are arranged at a distance in the circumferential direction about the axis C2. It is preferable that the radiation fins 65 be attached to the motor case 6 using a fixing device such as a screw.
  • the configuration of the radiation fins 65 is not limited to this, and any suitable configuration may be provided.
  • the blower (1) includes a fan unit (12) and a motor unit (14) attached to the fan unit (12).
  • the fan unit (12) includes a centrifugal fan (2) and a fan case (3) that accommodates the centrifugal fan (2).
  • the motor unit (14) includes a rotor (51) including a rotating shaft (514) connected to the centrifugal fan (2), a stator (53) that rotates the rotor (51), and a rotor (51) and a stator (53). ) and a motor case (6).
  • the fan case (3) is formed with an opening (30) for inserting a portion (66) of the motor case (6) into the fan case (3).
  • a gap (4) connected to the opening (30) is formed between the fan case (3) and the motor case (6).
  • the gap (4) constitutes at least a portion of a ventilation path (7) that communicates the inside of the fan case (3) with the outside space through the opening (30).
  • blower (1) when the centrifugal fan (2) rotates, air flows into the ventilation path (7) formed between the fan case (3) and the motor case (6). A flow occurs. Since the heat of the motor unit (14) is dissipated by this air flow, the heat dissipation performance of the motor unit (14) is improved.
  • the fan case (3) further includes a wall portion (38) along the motor case (6).
  • a ventilation path (7) is formed between the wall (38) and the motor case (6).
  • blower (1) when the centrifugal fan (2) rotates, the air passage ( 7), an air flow is generated. Since the heat of the motor unit (14) is dissipated by this air flow, the heat dissipation performance of the motor unit (14) is improved.
  • the wall portion (38) faces the motor case (6) in the axial direction in which the axis of the rotating shaft (514) extends. (380).
  • the ventilation path (7) can be formed to pass around the motor case (6) along the portion (380) of the wall (38). .
  • the wall portion (38) has an extension portion (381) extending from the opposing portion (380) along the axial direction of the rotating shaft (514). , 382).
  • the ventilation path (7) is formed long along the motor case (6), and the heat dissipation of the motor unit (14) can be further improved.
  • the extension portion (381) is located inside the fan case (3) along at least a portion of the ventilation path.
  • the heat dissipation of the portion of the motor unit (14) inserted into the inside of the fan case (3) can be further improved.
  • a stator (53) is thermally coupled to at least a portion of the air passage.
  • blower (1) According to the blower (1) according to the sixth aspect, heat generated in the stator (53) of the motor unit (14) can be efficiently dissipated.
  • the air passage (7) has a narrow portion ( 75).
  • the flow velocity in the narrow portion (75) of the ventilation path (7) increases, so that the heat dissipation of the targeted portion of the motor unit (14) is further improved. be able to.
  • the narrow portion (75) is arranged along a portion (691) of the motor case (6) that is thermally coupled to the stator (53). It is formed.
  • blower (1) According to the blower (1) according to the eighth aspect, heat generated in the stator (53) of the motor unit (14) can be efficiently dissipated.
  • the motor unit (14) further includes a circuit board (57) housed in the motor case (6).
  • the narrow portion (75) is formed along a portion (692) of the motor case (6) that is thermally coupled to the circuit board (57).
  • blower (1) According to the blower (1) according to the ninth aspect, heat generated in the circuit board (57) of the motor unit (14) can be efficiently dissipated.
  • a moving body (9) according to a tenth aspect includes the blower (1) according to any one of the first to ninth aspects, an object (91) to be cooled by the blower (1), and the blower (1) and the object to be cooled.
  • the moving body (9) when the centrifugal fan (2) of the blower (1) rotates, the air passage ( 7), an air flow is generated. Since the heat of the motor unit (14) is dissipated by this air flow, the heat dissipation of the motor unit (14) is improved, which in turn improves the heat dissipation of the blower (1) as a whole.
  • blower and moving body according to the present disclosure can be used in various products equipped with a motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente soufflante comprend une unité de ventilateur et une unité de moteur. L'unité de ventilateur comprend un ventilateur centrifuge et un carter de ventilateur recevant le ventilateur centrifuge. L'unité de moteur comprend un rotor, un stator et un carter de moteur recevant le rotor et le stator. Une ouverture est formée à l'intérieur du carter de moteur pour y insérer une partie du carter de moteur dans le carter de ventilateur. Un espace relié à l'ouverture est formé entre le carter de ventilateur et le carter de moteur. L'espace constitue un passage d'écoulement d'air, l'intérieur du carter de ventilateur étant en communication avec un espace extérieur par l'intermédiaire de l'ouverture.
PCT/JP2023/003536 2022-03-31 2023-02-03 Soufflante et corps mobile WO2023188813A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-061187 2022-03-31
JP2022061187 2022-03-31

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5430513A (en) * 1977-08-12 1979-03-07 Hitachi Ltd Blower
US20090291004A1 (en) * 2006-12-18 2009-11-26 Airfan Fan for an apparatus for the regulated delivery of a gas, in particular oxygen
WO2016158154A1 (fr) * 2015-03-30 2016-10-06 株式会社デンソー Dispositif de soufflante
WO2019049202A1 (fr) * 2017-09-05 2019-03-14 株式会社Ihi Machine hydraulique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5430513A (en) * 1977-08-12 1979-03-07 Hitachi Ltd Blower
US20090291004A1 (en) * 2006-12-18 2009-11-26 Airfan Fan for an apparatus for the regulated delivery of a gas, in particular oxygen
WO2016158154A1 (fr) * 2015-03-30 2016-10-06 株式会社デンソー Dispositif de soufflante
WO2019049202A1 (fr) * 2017-09-05 2019-03-14 株式会社Ihi Machine hydraulique

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