WO2017104009A1 - Soufflante et aspirateur comprenant une soufflante - Google Patents

Soufflante et aspirateur comprenant une soufflante Download PDF

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Publication number
WO2017104009A1
WO2017104009A1 PCT/JP2015/085142 JP2015085142W WO2017104009A1 WO 2017104009 A1 WO2017104009 A1 WO 2017104009A1 JP 2015085142 W JP2015085142 W JP 2015085142W WO 2017104009 A1 WO2017104009 A1 WO 2017104009A1
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WO
WIPO (PCT)
Prior art keywords
blower
shroud
impeller body
ring
blades
Prior art date
Application number
PCT/JP2015/085142
Other languages
English (en)
Japanese (ja)
Inventor
池田　尚史
光将 浜崎
Original Assignee
三菱電機株式会社
三菱電機ホーム機器株式会社
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, 三菱電機ホーム機器株式会社 filed Critical 三菱電機株式会社
Priority to JP2017555915A priority Critical patent/JP6509372B2/ja
Priority to PCT/JP2015/085142 priority patent/WO2017104009A1/fr
Publication of WO2017104009A1 publication Critical patent/WO2017104009A1/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
    • 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

Definitions

  • the present invention relates to a blower and a vacuum cleaner equipped with the blower.
  • the present invention has been made against the background of the above problems, and in the blower, the flow rate of the fluid flowing backward from the high pressure side to the low pressure side of the impeller body is suppressed, thereby improving the blowing efficiency and reducing the operation noise. It aims at obtaining the air blower which implement
  • a blower according to the present invention includes an impeller body having a plurality of blades, a ring-shaped shroud attached to the plurality of blades, and a fan case that rotatably houses the impeller body.
  • a ring-shaped recess surrounding the shroud is formed.
  • blower In the blower according to the present invention, flow path resistance is generated in the gap between the shroud and the fan case, and the flow rate of the fluid flowing backward from the high pressure side of the outer periphery of the blade to the low pressure side of the impeller body can be extremely reduced. Therefore, the blowing efficiency of the blower can be improved.
  • FIG. 1 is an external perspective view of a blower according to Embodiment 1.
  • FIG. 1 is an external side view of a blower according to Embodiment 1.
  • FIG. 2 is a perspective view of an impeller body according to Embodiment 1.
  • FIG. 3 is a side view of the impeller body according to Embodiment 1.
  • FIG. 3 is a perspective view of the impeller body according to Embodiment 1 with an upper shroud removed.
  • 3 is a top view of the impeller body according to Embodiment 1.
  • FIG. 2 is a cross-sectional view of the fan case according to Embodiment 1.
  • FIG. 4 is an enlarged cross-sectional view of an upper shroud portion according to Embodiment 1.
  • FIG. 4 is a graph showing the blowing efficiency of the blower according to Embodiment 1.
  • 6 is a cross-sectional view of a fan case according to Embodiment 2.
  • FIG. 6 is an enlarged cross-sectional view of an upper shroud portion according to Embodiment 2.
  • FIG. 5 is a side view of an impeller body according to Embodiment 3.
  • FIG. 6 is an enlarged cross-sectional view of an upper shroud portion according to Embodiment 3.
  • the air blower which concerns on this invention is applied to a cleaner is demonstrated, it is not limited to such a case, For example, you may apply to a ventilation apparatus or an air blower generally. 2, 4, 7, 8, and 10-13, the upper direction of the paper is defined as the upper side of the blower of the present invention, and the lower direction of the paper is defined as the lower side of the blower of the present invention.
  • FIG. ⁇ Configuration of blower 1> A blower 1 according to Embodiment 1 will be described with reference to FIGS. 1 is an external perspective view of a blower according to Embodiment 1.
  • FIG. FIG. 2 is an external side view of the blower according to the first embodiment.
  • the blower 1 is largely configured by a motor case 2 in which a motor is housed and a fan case 3 in which an impeller body 4 and the like are housed.
  • the motor case 2 has a cylindrical shape.
  • An exhaust port 2 a is opened below the motor case 2.
  • a disc-shaped bottom plate 2b is attached below the exhaust port 2a.
  • the fan case 3 is attached to the upper part of the motor case 2 in an airtight manner with respect to the motor case 2.
  • the fan case 3 is formed in a cylindrical shape, and an air inlet 3a through which air flows is formed in a circular shape at the center of the upper surface.
  • FIG. 3 is a perspective view of the impeller body according to the first embodiment.
  • FIG. 4 is a side view of the impeller body according to the first embodiment.
  • FIG. 5 is a perspective view of the impeller body according to Embodiment 1 with the upper shroud removed.
  • FIG. 6 is a top view of the impeller body according to the first embodiment.
  • FIG. 7 is a cross-sectional view of the fan case according to the first embodiment.
  • FIG. 8 is an enlarged cross-sectional view of the upper shroud portion according to the first embodiment.
  • FIG. 9 is a graph showing the blowing efficiency of the blower according to the first embodiment.
  • a disc-shaped impeller body 4 is rotatably housed inside the fan case 3.
  • the impeller body 4 includes a ring-shaped upper shroud 10 (corresponding to the shroud of the present invention) and a disk-shaped lower shroud 11 arranged coaxially with the upper shroud 10. And have.
  • the upper shroud 10 and the lower shroud 11 are made of, for example, a resin or a sheet metal, and are arranged at a predetermined interval.
  • a plurality of blades 12 are provided between the upper shroud 10 and the lower shroud 11.
  • the upper shroud 10 has a ring shape with a curved cross section as shown in FIG.
  • the upper shroud 10 includes an upper end portion 10a (corresponding to the first end portion of the present invention), an outer peripheral portion 10b (corresponding to the second end portion of the present invention), an outer peripheral surface portion 10c,
  • the inner peripheral surface portion 10d is formed by a configuration surface.
  • the upper end portion 10a is formed on the inner peripheral side of the outer peripheral surface portion 10c, as shown in FIGS.
  • the outer peripheral part 10b is formed in the outer peripheral side of the outer peripheral surface part 10c, for example, is formed in the surface parallel to the rotating shaft RC.
  • the outer peripheral surface part 10c and the inner peripheral surface part 10d are formed with curved surfaces curved in the radial direction of the impeller body 4, for example.
  • the lower shroud 11 has a disk shape with a cross section extending toward the lower part.
  • the blade 12 is formed to extend radially about a hub 13 disposed on the rotation axis RC of the upper shroud 10 and the lower shroud 11.
  • the blade 12 is formed integrally with the lower shroud 11, for example, made of resin or sheet metal. Further, the blade 12 has, for example, a backward inclined blade shape that inclines toward the reverse side toward the outer periphery of the lower shroud 11 with respect to the rotation direction A.
  • an inducer 14 formed integrally with the blade 12 is formed around the hub 13. As shown in FIG. 5, the inducer 14 is formed as a forward inclined blade shape inclined from the upper part of the blade 12 toward the forward side in the rotation direction A. The inducer 14 is formed so that the blade thickness decreases from the hub 13 side toward the outer circumferential direction. As shown in FIGS. 3 and 4, the upper shroud 10 is disposed on the blade 12 with the inducer 14 inserted through the circular opening 10 e at the center. The upper shroud 10 and each blade 12 may be formed integrally or separately. When the upper shroud 10 and each blade 12 are molded separately, the upper shroud 10 is attached on each blade 12.
  • the upper end portion 10 a of the upper shroud 10 is disposed at a position aligned with the connection portion 15 between the blade 12 and the inducer 14 as shown in FIGS.
  • the inducer 14 is a blade for rectifying the fluid sucked from the air inlet 3 a of the fan case 3.
  • the diameter D3 of the opening 10e of the upper shroud 10 is 55% to 75% (0.55 ⁇ D3 / D2 ⁇ 0.75) with respect to the outer diameter D2 of the blade 12. It has become.
  • the fan case 3 includes an inlet casing 20 in which an air inlet 3 a is formed, and a back casing 30 disposed between the inlet casing 20 and the motor case 2.
  • the impeller body 4 is disposed between the inlet casing 20 and the back casing 30.
  • the impeller body 4 has a cylindrical rotation shaft hole 4a in which the rotation shaft RC of the motor is fitted and fixed.
  • a rotation shaft RC of the motor is rotatably supported by a bearing 31 provided in the back casing 30.
  • a diffuser space 23 through which a fluid flows is formed.
  • a stationary blade 22 that rectifies the flow of fluid is disposed.
  • the diffuser space 23 is formed in communication with the impeller body 4 and the motor case 2.
  • the back casing 30 includes a cylindrical portion 32 that forms an outer shell, and an inner disk portion 33 that is formed inside the cylindrical portion 32 and holds the bearing 31.
  • a diffuser space 23 is formed in a substantially U shape between the inner surface of the cylindrical portion 32 and the outer peripheral surface of the internal disc portion 33.
  • On the upper surface of the inner disk portion 33 a circular recess 33a for accommodating the lower shroud 11 of the impeller body 4 is formed.
  • the inlet casing 20 is engaged with the upper part of the back casing 30.
  • the inlet casing 20 includes a disk-shaped disk portion 20a, a cylindrical intake edge portion 20b formed at the center of the disk portion 20a, and an outer surface of the disk portion 20a formed around the intake edge portion 20b. And a step portion 20c formed one step higher than 20d.
  • the disc portion 20a is configured to be thicker than the intake edge portion 20b and the step portion 20c.
  • a ring-shaped recess 21 is formed on the lower surface of the disc portion 20a so as to surround the upper shroud 10 of the impeller body 4.
  • the ring-shaped concave portion 21 includes a first surface portion 21 a formed to face the upper end portion 10 a of the upper shroud 10 and a second surface formed to face the outer peripheral portion 10 b of the upper shroud 10. It is comprised by the surface part 21b and the curved part 21c formed facing the outer peripheral surface part 10c of the upper shroud 10. As shown in FIG.
  • the first surface portion 21a is formed, for example, as a surface perpendicular to the rotation axis RC.
  • the 2nd surface part 21b is formed in the surface parallel with respect to the rotating shaft RC, for example.
  • the curved part 21c is formed with the curved surface curved in the radial direction of the impeller main body 4, for example.
  • the 1st surface part 21a is formed in the outward of the inlet casing 20 (above the rotating shaft RC direction) rather than the outer surface 20d of the disc part 20a.
  • the first surface portion 21a is formed between the air inlet 3a and the outer surface 20d of the disc portion 20a.
  • a step portion 20c formed from the outer surface 20d of the disc portion 20a to the outside of the inlet casing 20 by one step is required.
  • the dimension of the gap between the ring-shaped recess 21 and the upper shroud 10 defined by the respective constituent surfaces is set to the minimum clearance when the impeller body 4 rotates.
  • blower 1 when the motor in the motor case 2 is driven, the rotational force rotates the rotating shaft RC and rotates the impeller body 4 attached to the upper portion of the rotating shaft RC.
  • the inducer 14 of the impeller body 4 causes fluid to flow into the fan case 3 from the air inlet 3a.
  • the fluid that has flowed into the fan case 3 moves from between the blades of the inducer 14 in the outer peripheral direction and flows between the blades of the blade 12.
  • the fluid pushed between the blades 12 having the rearward inclined blade shape between the upper shroud 10 and the lower shroud 11 is increased in total pressure by the rotation of the impeller body 4 and flows into the diffuser space 23.
  • a stationary blade 22 is formed in the diffuser space 23 to rectify the turbulent flow of the fluid and send the fluid into the motor case 2.
  • the fluid that has passed through the motor case 2 flows out of the motor case 2 through the exhaust port 2 a at the lower part of the motor case 2.
  • the gap between the impeller body 4 and the inlet casing 20 has a characteristic shape. That is, the upper shroud 10 of the impeller body 4 is housed in the ring-shaped recess 21 of the inlet casing 20.
  • the ring-shaped recess 21 includes a first surface portion 21 a formed to face the upper end portion 10 a of the upper shroud 10, a second surface portion 21 b formed to face the outer peripheral portion 10 b of the upper shroud 10, and the upper shroud 10. And a curved portion 21c formed so as to face the outer peripheral surface portion 10c.
  • the gap between the upper shroud 10 and the inlet casing 20 is bent twice between the low pressure side and the high pressure side, flow path resistance is generated, and the low pressure side of the impeller body 4 from the high pressure side of the outer periphery of the blade 12. Therefore, the flow rate of the fluid RA that flows backward can be made very small. Therefore, the ventilation efficiency of the blower 1 can be improved.
  • the fluid RA which has flowed back from the high pressure side through the gap between the upper shroud 10 and the inlet casing 20, is joined to the intermediate pressure region (downstream of the inducer 14) separated from the intake port 3a. Then, since the fluid that flows backward does not narrow the flow path of the fluid flowing from above at the intake port 3a from the side, the suction efficiency of the blower 1 is not reduced.
  • Embodiment 2 FIG.
  • the upper shroud 10 of the impeller body 4 is housed in the ring-shaped recess 21 of the inlet casing 20.
  • the second embodiment is different from the first embodiment in that the shape of the ring-shaped recess 21 is changed. Therefore, this difference will be mainly described.
  • description is abbreviate
  • FIG. 10 is a cross-sectional view of the fan case according to the second embodiment.
  • FIG. 11 is an enlarged cross-sectional view of an upper shroud portion according to the second embodiment.
  • an inner peripheral vertical surface portion 10f formed by a plane parallel to the rotation axis RC, and an outer periphery A vertical surface portion 10g is formed.
  • the ring-shaped recessed part 21 of the inlet casing 20 has the ring-shaped protrusion part 25 projected from the 1st surface part 21a on the inner peripheral side of the 1st surface part 21a.
  • the ring-shaped protruding portion 25 protrudes downward from the lower end of the intake edge portion 20b. Moreover, the ring-shaped recessed part 21 has the 3rd surface part 21d which forms a surface parallel to the rotating shaft RC in the outer peripheral side of the 1st surface part 21a.
  • the ring-shaped recess 21 includes a first surface portion 21a formed to face the upper end portion 10a of the upper shroud 10, a second surface portion 21b formed to face the outer peripheral portion 10b of the upper shroud 10, and an upper shroud. 10 a curved portion 21c formed to face the outer peripheral surface portion 10c, a ring-shaped protrusion 25 formed to face the inner peripheral vertical surface portion 10f, and a third portion formed to face the outer peripheral vertical surface portion 10g. And a surface portion 21d.
  • Embodiment 3 In the blower 1 according to the second embodiment, the upper shroud 10 of the impeller body 4 is housed in the ring-shaped recess 21 of the inlet casing 20, and the ring-shaped protrusion 25 is provided on the inner peripheral side of the ring-shaped recess 21.
  • the third embodiment is different from the first embodiment in that the shape of the upper shroud 10 is changed from the first and second embodiments. Therefore, this difference will be mainly described.
  • description is abbreviate
  • FIG. 12 is a side view of the impeller body according to the third embodiment.
  • FIG. 13 is an enlarged cross-sectional view of an upper shroud portion according to the third embodiment.
  • the impeller body 4 according to the third embodiment has an outer diameter D1 at the outer peripheral portion 10b of the upper shroud 10 of 105% or more and 115% with respect to an outer diameter D2 at the outer end portion 12a of the blade 12.
  • the dimensions are as follows (1.05 ⁇ D1 / D2 ⁇ 1.15).
  • the outer peripheral portion 10 b of the upper shroud 10 is configured to protrude toward the diffuser space 23 compared to the outer end portion 12 a of the blade 12.
  • blower 1 can be configured by appropriately combining the configurations of the blowers 1 according to the first to third embodiments.
  • the blower according to the first to third embodiments is (1) An impeller body 4 having a plurality of blades 12 and a ring-shaped upper shroud 10 attached to the plurality of blades 12, and a fan case 3 that rotatably stores the impeller body 4.
  • the fan case 3 is formed with a ring-shaped recess 21 surrounding the upper shroud 10. Then, flow path resistance is generated in the gap between the upper shroud 10 and the fan case 3, and the flow rate of the fluid RA that flows backward from the high pressure side of the outer periphery of the blade 12 to the low pressure side of the impeller body 4 can be made extremely small. Therefore, the ventilation efficiency of the blower 1 can be improved.
  • the upper shroud 10 has an outer peripheral surface portion 10c that is curved in the radial direction, and the ring-shaped concave portion 21 has a curved portion 21c that is formed to face the outer peripheral surface portion 10c. Then, flow path resistance is generated in the gap between the outer peripheral surface portion 10c of the upper shroud 10 and the curved portion 21c of the fan case 3, and the flow rate of the fluid RA flowing backward from the high pressure side of the outer periphery of the blade 12 to the low pressure side of the impeller body 4 is reduced. Can be made smaller. Therefore, the ventilation efficiency of the blower 1 can be improved.
  • the upper shroud 10 is formed on one end side of the outer peripheral surface portion 10c and has an upper end portion 10a having a surface perpendicular to the rotation axis RC of the impeller body 4, and is formed on the other end side of the outer peripheral surface portion 10c and is on the rotation axis RC.
  • the ring-shaped recess 21 includes a first surface portion 21a formed to face the upper end portion 10a, and a second surface portion 21b formed to face the outer periphery portion 10b. It has.
  • the outer diameter of the upper shroud 10 is configured to be larger than the outer diameters of the plurality of blades 12. Then, it is possible to suppress the fluid discharged from the blade 12 in the outer peripheral direction from being restrained by the upper shroud 10 and rapidly expanding and flowing in the direction of the rotation axis RC. Therefore, the fluid can smoothly flow into the diffuser space 23, and the pressure fluctuation can be suppressed. By suppressing the pressure fluctuation in the diffuser space 23, the static pressure in the stationary blade 22 can be efficiently recovered, and the blowing efficiency of the blower 1 can be improved.
  • the fan case 3 includes a disc portion 20a that forms an outer shell, and an intake edge portion 20b that is erected from the outer shell surface 20d of the disc portion 20a and that has an intake port 3a that is open. It is formed between the mouth 3a and the outer surface 20d. Then, the fluid RA that has flowed back from the high pressure side through the gap between the upper shroud 10 and the fan case 3 joins the intermediate pressure region that is separated from the intake port 3a. Therefore, the flow path of the fluid flowing in from the upper side in the intake port 3a is not narrowed from the side by the backflowed fluid RA, so that the suction efficiency of the blower 1 is not lowered.
  • the air inlet 3 a is a circular opening, and the diameter of the opening is a dimension of 55% or more and 75% or less with respect to the outer diameter of the plurality of blades 12. Then, the suction resistance at the intake port 3a is suppressed, and the pressure on the low pressure side of the impeller body 4 increases, so that the flow rate of the fluid RA that flows backward from the high pressure side of the outer periphery of the blade 12 to the low pressure side of the impeller body 4 is reduced. Can do. Therefore, as shown in FIG. 9, it becomes possible to improve the ventilation efficiency (%) of the blower 1 calculated by the air volume / input value or the like.
  • the plurality of blades 12 have a backward inclined blade shape with respect to the rotation direction A of the impeller body 4, and the plurality of blades 12 have an inducer 14 having a forward inclined blade shape with respect to the rotation direction A of the impeller body 4. It is formed. Then, the fluid sucked from the intake port 3a of the fan case 3 can be rectified by the inducer 14 and sent to the blade 12 side. Therefore, it becomes possible to improve the ventilation efficiency of the blower 1.

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

Abstract

L'invention concerne une soufflante comprenant : un corps de roue ayant une pluralité de pales et une enveloppe annulaire fixée sur la pluralité de pales ; et un carter de ventilateur qui loge en rotation le corps de roue. Un évidement annulaire entourant la périphérie de l'enveloppe est formé dans le carter de ventilateur.
PCT/JP2015/085142 2015-12-16 2015-12-16 Soufflante et aspirateur comprenant une soufflante WO2017104009A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2017555915A JP6509372B2 (ja) 2015-12-16 2015-12-16 送風機、および、その送風機を備えた掃除機
PCT/JP2015/085142 WO2017104009A1 (fr) 2015-12-16 2015-12-16 Soufflante et aspirateur comprenant une soufflante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/085142 WO2017104009A1 (fr) 2015-12-16 2015-12-16 Soufflante et aspirateur comprenant une soufflante

Publications (1)

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WO2017104009A1 true WO2017104009A1 (fr) 2017-06-22

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PCT/JP2015/085142 WO2017104009A1 (fr) 2015-12-16 2015-12-16 Soufflante et aspirateur comprenant une soufflante

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JP (1) JP6509372B2 (fr)
WO (1) WO2017104009A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111608937A (zh) * 2019-02-25 2020-09-01 信浓绢糸株式会社 送风机
CN111963262A (zh) * 2020-09-23 2020-11-20 萍乡北京理工大学高新技术研究院 一种外廓式空气轴承

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6293196U (fr) * 1985-11-30 1987-06-13
JP2010242543A (ja) * 2009-04-02 2010-10-28 Panasonic Corp 電動送風機及びこれを用いた電気掃除機
JP2013079625A (ja) * 2011-10-05 2013-05-02 Mitsubishi Electric Corp 電動遠心送風機及びこれを用いた電気掃除機
US20140356131A1 (en) * 2013-05-31 2014-12-04 Samsung Electro-Mechanics Co., Ltd. Fan module and electric blower having the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2743594B2 (ja) * 1991-02-28 1998-04-22 松下電器産業株式会社 電動送風機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6293196U (fr) * 1985-11-30 1987-06-13
JP2010242543A (ja) * 2009-04-02 2010-10-28 Panasonic Corp 電動送風機及びこれを用いた電気掃除機
JP2013079625A (ja) * 2011-10-05 2013-05-02 Mitsubishi Electric Corp 電動遠心送風機及びこれを用いた電気掃除機
US20140356131A1 (en) * 2013-05-31 2014-12-04 Samsung Electro-Mechanics Co., Ltd. Fan module and electric blower having the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111608937A (zh) * 2019-02-25 2020-09-01 信浓绢糸株式会社 送风机
US11149740B2 (en) 2019-02-25 2021-10-19 Shinano Kenshi Kabushiki Kaisha Blower
CN111963262A (zh) * 2020-09-23 2020-11-20 萍乡北京理工大学高新技术研究院 一种外廓式空气轴承

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JPWO2017104009A1 (ja) 2018-08-02

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