WO2021024934A1 - Ventilateur - Google Patents

Ventilateur Download PDF

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Publication number
WO2021024934A1
WO2021024934A1 PCT/JP2020/029416 JP2020029416W WO2021024934A1 WO 2021024934 A1 WO2021024934 A1 WO 2021024934A1 JP 2020029416 W JP2020029416 W JP 2020029416W WO 2021024934 A1 WO2021024934 A1 WO 2021024934A1
Authority
WO
WIPO (PCT)
Prior art keywords
impeller
housing
fan
diffuser
outer peripheral
Prior art date
Application number
PCT/JP2020/029416
Other languages
English (en)
Japanese (ja)
Inventor
大塚　誠
Original Assignee
ミネベアミツミ株式会社
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 ミネベアミツミ株式会社 filed Critical ミネベアミツミ株式会社
Publication of WO2021024934A1 publication Critical patent/WO2021024934A1/fr

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Classifications

    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • the present invention relates to a fan.
  • the present invention is an example of a problem to provide a fan capable of efficiently cooling.
  • the fan of the present invention includes a rotating shaft, a stator, a housing, an impeller surrounded by the housing, and a diffuser provided between the housing and the impeller in the radial direction.
  • the stator faces the outer peripheral portion of the impeller in the radial direction, and the stator faces the opening of the diffuser in the rotation axis direction.
  • the fan of the present invention includes a magnet, a bearing, and a sleeve surrounding the bearing, and the magnet may be provided between the impeller and the sleeve in the direction of rotation axis. .. Further, in the fan of the present invention, the magnet may be opposed to the outer peripheral portion of the impeller in the direction of the rotation axis. Further, in the fan of the present invention, it is possible that the coil of the stator faces the opening of the diffuser in the direction of the rotation axis. Further, in the fan of the present invention, a first space is formed between the housing and the impeller, a second space is formed between the housing and the diffuser, and the first space and the first space are formed. It can be assumed that it communicates with the second space.
  • FIG. 5 is a cross-sectional perspective view of a fan according to an embodiment of the present invention as viewed from diagonally above. It is a partially enlarged perspective view of a part of the fan of FIG. It is sectional drawing which shows typically the flow of the wind in the fan which concerns on embodiment which is an example of this invention.
  • FIG. 1 is a cross-sectional perspective view of the fan 1 according to the embodiment of the present invention as viewed from diagonally above
  • FIG. 2 is a partially enlarged perspective view of a part of the fan 1 of FIG.
  • the arrow a direction is the upper side a and the arrow b direction is the lower side b in the axis x direction.
  • the direction away from the axis x is the outer peripheral side c
  • the direction toward the axis x is the inner circumference. Let it be the side d.
  • the circumferential direction (arrow e and f direction) about the rotation axis x is the circumferential direction e (hereinafter, also referred to as “clockwise”) and the circumferential direction f (hereinafter, also referred to as “counterclockwise”). And.
  • the fan 1 of the present embodiment has a shaft (rotating shaft) 2, a housing 3 provided on the outer peripheral side c of the shaft 2, an impeller 4 surrounded by the housing 3, and a radial direction.
  • a diffuser 5 provided between the housing 3 and the impeller 4 and a stator 6 provided on the outer peripheral side c of the impeller 4 in the radial direction are provided.
  • the fan 1 includes a magnet 7 provided on the lower side b of the impeller 4, an annular member 8 (a substrate having an annular shape) for holding the magnet 7, and a bearing 9 for rotatably supporting the shaft 2.
  • a sleeve 10 provided on the outer peripheral side c of the bearing 9 and a circuit board 11 (board) provided on the lower side b of the diffuser 5 are provided.
  • the shaft 2 includes a fixing portion 21 to which the impeller 4 is fixed on the upper side a in the rotation axis direction (hereinafter, referred to as “axis x direction”), and rotates counterclockwise f around the axis x.
  • the housing 3 includes a housing provided on the upper side a (hereinafter, the housing 3 provided on the upper side a is referred to as a “first housing”) 31 and a housing provided on the lower side b (hereinafter, the lower side).
  • the housing 3 provided in b is referred to as a "second housing 32" 32.
  • the first housing 31 of the housing 3 has a substantially disk-shaped upper wall portion 311 centered on the axis x, a tubular portion 312 protruding from the upper wall portion 311 to the upper side a, and an outer peripheral portion 311c of the upper wall portion 311. Includes a side wall portion 313 that extends to the lower side b and surrounds the outer peripheral side c of the diffuser 5.
  • the tubular portion 312 is formed with a circular opening on the upper side a. This opening is an intake port 30a for taking in air.
  • the side wall portion 313 is provided on the first side wall portion 314 extending from the outer peripheral side c of the upper wall portion 311 toward the lower side b and the lower side b of the first side wall portion 314, and is provided on the outer circumference of the second housing 32. It is composed of a second side wall portion 315 surrounding the side c. That is, the side wall portion 313 is divided into a first side wall portion 314 and a second side wall portion 315.
  • the first side wall portion 314 has a protrusion 314a protruding toward the lower side b on the outer peripheral side c and a concave portion (notched) recessed from the end portion of the lower side b toward the upper side a on the inner peripheral side d. Notch) 314b is formed.
  • the second side wall portion 315 has a protrusion 315a protruding toward the upper side a on the inner peripheral side d and a concave portion (notch) recessed from the end portion of the upper side a toward the lower side b on the outer peripheral side c.
  • the cut notch) 315b is formed.
  • the first side wall portion 314 and the second side wall portion 315 extend the protrusion 314a of the first side wall portion 314 to the notch portion 315b of the second side wall portion 315, and the protrusion portion of the second side wall portion 315.
  • the 315a are connected by engaging with each other with the notch 314b of the first side wall 314.
  • the second housing 32 of the housing 3 includes an annular bottom wall portion 321 centered on the axis x and an outer wall portion 322 extending from the outer peripheral side c of the bottom wall portion 321 to the upper side a and surrounding the outer peripheral side c of the stator 6. Includes an inner wall portion 323 extending from the inner peripheral side d of the bottom wall portion 321 to the upper side a and surrounding the outer peripheral side c of the sleeve 10.
  • the upper end 322a of the upper side a of the outer wall portion 322 is in contact with the lower surface of the diffuser 5. Further, a fixing portion 324 to which the stator 6 is fixed is provided on the inner peripheral surface 322d of the inner peripheral side d.
  • the fixing portion 324 has a recess (a notched portion having a notched shape) in which the inner peripheral side d of the upper end 322a is recessed from the upper side a to the lower side b.
  • the outer peripheral surface 322c of the outer peripheral side c of the outer wall portion 322 is provided at a predetermined distance from the inner peripheral surface 312d of the inner peripheral side d of the side wall portion 313 of the first housing 31 in the radial direction.
  • the opening is formed.
  • the annular opening is an exhaust port 30b for discharging air.
  • a fixing portion 325 to which the circuit board 11 is fixed is provided on the upper side a of the inner wall portion 323.
  • the fixing portion 325 has a recess (a notched portion having a notched shape) in which the outer peripheral side c of the upper end 323a of the upper end a is recessed from the upper side a toward the lower side b.
  • the impeller 4 includes a main body portion (hereinafter, the main body portion of the impeller 4 is referred to as an “impeller main body portion”) 41 and a plurality of blades 42 provided on the outer peripheral surface 41c of the impeller main body portion 41.
  • the upper side a of the impeller 4 is housed inside the tubular portion 312 of the first housing 31, and the lower side b is surrounded by the upper wall portion 311 and the side wall portion 313 of the first housing 31 and housed inside. ..
  • a first space S1 is formed between the impeller 4 and the housing 3.
  • the impeller 4 is provided at a predetermined distance from the inner peripheral surface 31d facing the inner peripheral side d of the first housing 31, so that the first housing 3 and the impeller 4 are separated from each other. Space S1 is formed.
  • the impeller main body 41 is inclined downward from the inner peripheral side d toward the outer peripheral side c, and has a substantially disk shape centered on the axis x.
  • the inner peripheral portion 411 on the inner peripheral side d of the impeller main body portion 41 is fixed to the fixing portion 21 of the shaft 2. Therefore, the impeller 4 is adapted to rotate with the rotation of the shaft 2.
  • the outer peripheral portion 412 on the outer peripheral side c of the impeller main body 41 faces the diffuser 5 and the stator 6 in the radial direction, and faces the magnet 7 in the axis x direction.
  • "opposing” includes not only the case where they are arranged at intervals from each other but also the case where they are in contact with each other, and “contact” is also included in the concept of facing each other.
  • the outer peripheral surface 412c of the outer peripheral side c faces the diffuser 5 and the stator 6 in the radial direction
  • the lower surface 412b of the lower side b is the magnet 7 in the axial direction x direction. Is in contact with.
  • the plurality of blades 42 of the impeller 4 project toward the inner peripheral surface 31d of the first housing 31. By the rotation of the plurality of blades 42, an air flow that sucks air from the intake port 30a and discharges it from the exhaust port 30b is generated.
  • the diffuser 5 includes a disk-shaped main body portion centered on the axis x (hereinafter, the main body portion of the diffuser 5 is referred to as a “diffuser main body portion”) 51 and blades protruding from the diffuser main body portion 51 toward the upper side a. (Hereinafter, the blades of the diffuser 5 are referred to as "rectifying blades”.) 52, and a plurality of openings 53 facing the stator 6 are provided.
  • the diffuser 5 is surrounded by the upper wall portion 311 and the side wall portion 313 of the first housing 31 and housed therein, and is fixed to the fixing portion 324 of the second housing 32.
  • a second space S2 is formed between the diffuser 5 and the housing 3.
  • a second space S2 is formed between the diffuser 5 and the diffuser 5.
  • the first space S1 between the housing 3 and the impeller 4 and the second space S2 communicate with each other. That is, the first space S1 and the second space S2 are spatially connected.
  • the rectifying blade 52 is curved so that the clockwise e side is convex, and the air sucked from the intake port 30a flows from the inner peripheral side d to the outer peripheral side c. That is, the rectifying blade 52 guides the air sucked from the intake port 30a from the first space S1 to the second space S2.
  • the opening 53 of the diffuser 5 communicates the space on the upper side a and the space on the lower side b of the diffuser main body 51 to expose the stator 6. Specifically, the opening 53 exposes a part of the surface of the stator 6 facing the upper side a.
  • a plurality of stators 6 are provided at predetermined intervals (equal intervals in the embodiment) along the circumferential direction e about the axis x, and include an iron core 61 and a coil 62 wound around the outer circumference of the iron core 61, respectively. ..
  • the stator 6 faces the opening 53 of the diffuser 5 in the x direction of the axis, and is exposed from the opening 53. Further, the stator 6 is fixed to the fixing portion 324 of the outer wall portion 322 of the second housing 32.
  • the magnet 7 has a ring-shaped shape centered on the axis x, and a region in which the outer peripheral side c is magnetized to the N pole and a region magnetized in the S pole are along the circumferential direction e. It is provided alternately at regular intervals.
  • the magnet 7 is provided between the impeller 4 and the sleeve 10 in the axial direction x direction, and is provided between the annular member 8 and the stator 6 in the radial direction.
  • the annular member 8 is a disk-shaped main body portion centered on the axis x (hereinafter, the main body portion of the annular member 8 is referred to as a “circular member main body portion”) 81 and the annular member main body portion 81. It includes an outer peripheral portion 82 extending from the outer peripheral side c toward the lower side b, and an inner peripheral portion 83 extending from the inner peripheral side d of the annular member main body 81 toward the lower side b.
  • a magnet 7 is fixed to the outer peripheral side c of the outer peripheral portion 82, and can rotate counterclockwise f around the axis x.
  • the inner peripheral portion 83 is fixed to the outer peripheral surface 2c of the shaft 2, and the shaft 2 is adapted to the rotation of the magnet 7 and the annular member 8.
  • the bearing 9 is provided on the bearing 9a provided at the end portion 2b of the lower side b in the axial direction x direction of the shaft 2, and the intermediate portion 2e which is intermediate between the end portion 2a of the upper side a and the end portion 2b of the lower side b. It has two bearings 9b provided.
  • the bearings 9a and 9b use members having the same configuration (same shape, structure, size, and material). Therefore, in the following, the bearings 9a and 9b will be described as the bearing 9.
  • the bearing 9 is a so-called ball bearing composed of an outer peripheral ring 91, an inner peripheral ring 92, and a bearing ball 93 interposed between the outer peripheral ring 91 and the inner peripheral ring 92.
  • the bearing ball 93 By rolling the bearing ball 93 between the outer peripheral ring 91 and the inner peripheral ring 92, the rotational resistance of the inner peripheral ring 92 with respect to the outer peripheral ring 91 is significantly reduced.
  • the outer peripheral ring 91 is fixed to the inner peripheral surface of the sleeve 10, and the inner peripheral ring 92 is fixed to the outer peripheral surface of the shaft 2.
  • the sleeve 10 is in contact with the inner peripheral surface 323d of the inner wall portion 323 of the second housing 32 in the radial direction.
  • the sleeve 10 has a cylindrical shape that covers the outer peripheral side c of the end portion 2b from the intermediate portion 2e in the axis x direction of the shaft 2, and houses the bearings 9a and 9b inside.
  • the circuit board 11 has a disk shape centered on the axis x, and is provided between the diffuser 5 and the bottom wall portion 321 of the second housing 32 in the axis x direction. Further, in the circuit board 11, the end surface 11d on the inner peripheral side d is fixed to the fixing portion 325 of the inner wall portion 323 of the second housing 32.
  • FIG. 3 is a cross-sectional view schematically showing the flow of wind by the fan 1.
  • a predetermined voltage is applied from an external power source (not shown)
  • a controlled current is supplied to the coil 62 via the circuit board 11.
  • the impeller 4 fixed to the shaft 2 rotates counterclockwise f.
  • the air near the intake port 30a is sucked in the direction of arrow D1. That is, an air flow is generated in the first space S1 by the rotation of the blades 42 of the impeller 4, and the air near the intake port 30a is introduced in the direction of the arrow D1.
  • the air introduced from the intake port 30a flows in the direction of arrow D2.
  • the air flowing in the direction of the arrow D2 flows in the direction of the arrow D3 by the rectifying blade 52 and flows from the first space S1 to the second space S2.
  • the stator 6 since the stator 6 is exposed from the opening 53 of the diffuser 5, the stator 6 is cooled by the air flowing from the arrow D2 direction to the arrow D3 direction.
  • the air flowing into the second space S2 flows from the arrow D4 direction to the arrow D5 direction and is discharged from the exhaust port 30b. In this way, an air flow from the intake port 30a to the exhaust port 30b is generated.
  • a diffuser 5 is provided between the housing 3 and the impeller 4 in the radial direction, the stator 6 faces the outer peripheral portion 412 of the impeller 4 in the radial direction, and the stator is in the axis x direction. 6 is exposed in the opening 53 of the diffuser 5. Therefore, the air introduced from the intake port 30a is guided to the exhaust port 30b by the rectifying blade 52 of the diffuser 5, and the stator 6 is cooled by the opening 53 of the diffuser 5. Therefore, the stator 6 can be efficiently cooled by using the air flow as it is without branching the wind flow by the fan 1 in the middle.
  • the magnet 7 is provided between the impeller 4 and the sleeve 10 having the bearing 9 in the axis x direction. Therefore, for example, the deteriorated bearing 9 can be easily replaced with a new bearing by replacing the entire sleeve 10.
  • the stator 6 faces the outer peripheral portion 412 of the impeller 4 in the radial direction, and the magnet 7 is in contact with the outer peripheral portion 412 of the impeller 4 in the axial direction x direction. Therefore, the height dimension in the axis x direction can be reduced as compared with the conventional fan in which the stator is provided on the lower side of the impeller. Therefore, the fan 1 can be made smaller.
  • the coil 62 of the stator 6 faces the opening 53 of the diffuser 5. Therefore, the stator 6 can be cooled more efficiently.
  • the fan 1 according to the present embodiment the first space S1 between the housing 3 and the impeller 4 and the second space S2 between the housing 3 and the diffuser 5 communicate with each other. Therefore, an air flow from the first space S1 to the second space S2 can be easily generated. As described above, the fan 1 according to the present embodiment can efficiently cool the stator 6.
  • the fan of the present invention has been described above with reference to preferred embodiments, the fan of the present invention is not limited to the configurations of the above-described embodiments and modifications.
  • the opening 53 of the diffuser 5 has been described with reference to an example in which a part of the surface of the stator 6 facing the upper side a is exposed, but the opening 53 is the stator 6. The entire surface facing the upper side a may be exposed.
  • the side wall portion 313 of the first housing 31 has been described with reference to an example in which the side wall portion 313 is divided into a first side wall portion 314 and a second side wall portion 315.
  • the first side wall portion 314 and the second side wall portion 315 may be integrally formed.
  • the "fan” of the present invention can be used not only as a so-called “blower” that uses the wind at the destination, but also as a so-called “suction device” that uses the negative pressure of sucking air. Wind is also sent in the "suction device", and the "fan” of the present invention is a concept including this "suction device”.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un ventilateur apte à fournir un refroidissement efficace.　Ce ventilateur (1) comprend : un arbre (2) (arbre rotatif); un carter (3) disposé vers le côté circonférentiel externe (c) de l'arbre (2); une hélice (4) entourée par le carter (3); un diffuseur (5) disposé radialement entre le carter (3) et l'hélice (4); et un stator (6) disposé radialement sur le côté circonférentiel externe (c) de l'hélice (4). Dans le ventilateur (1), le stator (6) fait face radialement à la section circonférentielle externe (412) de l'hélice (4), et à une section d'ouverture (53) du diffuseur (5) dans la direction de l'axe de rotation (x).
PCT/JP2020/029416 2019-08-08 2020-07-31 Ventilateur WO2021024934A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019146675A JP2021025516A (ja) 2019-08-08 2019-08-08 ファン
JP2019-146675 2019-08-08

Publications (1)

Publication Number Publication Date
WO2021024934A1 true WO2021024934A1 (fr) 2021-02-11

Family

ID=74503843

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/029416 WO2021024934A1 (fr) 2019-08-08 2020-07-31 Ventilateur

Country Status (2)

Country Link
JP (1) JP2021025516A (fr)
WO (1) WO2021024934A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010196707A (ja) * 2009-02-24 2010-09-09 Dyson Technology Ltd ロータ組立体
JP2014514061A (ja) * 2011-04-05 2014-06-19 レスメド・リミテッド 呼吸装置
JP2019112963A (ja) * 2017-12-21 2019-07-11 日本電産株式会社 送風装置、及び、これを備える掃除機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010196707A (ja) * 2009-02-24 2010-09-09 Dyson Technology Ltd ロータ組立体
JP2014514061A (ja) * 2011-04-05 2014-06-19 レスメド・リミテッド 呼吸装置
JP2019112963A (ja) * 2017-12-21 2019-07-11 日本電産株式会社 送風装置、及び、これを備える掃除機

Also Published As

Publication number Publication date
JP2021025516A (ja) 2021-02-22

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