EP2511533A1 - Air blowing device - Google Patents

Air blowing device Download PDF

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Publication number
EP2511533A1
EP2511533A1 EP10835623A EP10835623A EP2511533A1 EP 2511533 A1 EP2511533 A1 EP 2511533A1 EP 10835623 A EP10835623 A EP 10835623A EP 10835623 A EP10835623 A EP 10835623A EP 2511533 A1 EP2511533 A1 EP 2511533A1
Authority
EP
European Patent Office
Prior art keywords
blade
air blowing
blowing device
protrusion
outer side
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP10835623A
Other languages
German (de)
English (en)
French (fr)
Inventor
Yukihiko Sekiguchi
Yuuma Shimoda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Original Assignee
Panasonic Corp
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 Panasonic Corp filed Critical Panasonic Corp
Publication of EP2511533A1 publication Critical patent/EP2511533A1/en
Withdrawn legal-status Critical Current

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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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • F04D29/386—Skewed blades
    • 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel

Definitions

  • the present invention relates to large-scale air blowing devices typically used for agricultural affairs.
  • An air blowing device includes a cylindrical orifice, a motor provided on a central axis of the orifice, and multiple blades disposed at predetermined intervals on an outer periphery of a motor shaft of the motor.
  • Each blade has a rectangular shape, and its inner side is disposed facing the motor shaft. Its outer side is disposed facing orifice at the outer periphery. (For example, refer to PTL 1.)
  • a disadvantage of the conventional air blowing device as described above is its large power consumption. More specifically, this type of air blowing devices is used for feeding air to livestock barns, poultry houses, and greenhouses. Therefore, its power consumption typically reaches 600W.
  • An air blowing device of the present invention includes a cylindrical orifice, a motor provided on a central axis of the orifice, and multiple blades disposed on an outer periphery of a motor shaft of the motor at predetermined intervals.
  • the blades have rectangular shapes whose inner sides are facing the motor shaft and outer sides are facing the orifice.
  • a front side linking the inner side and outer side of each blade has a first protrusion protruding in a rotating direction at its middle part.
  • the blade is curved to the side opposite to the rotating direction from the first protrusion to the inner side and the outer side.
  • a rear side linking the inner side and the outer side of the blade has a second protrusion protruding in the rotating direction at its middle part.
  • the blade is curved to the side opposite to the rotating direction from the second protrusion to the inner side and the outer side.
  • air blowing device 100 in the exemplary embodiment at least includes cylindrical orifice 1, motor 3 shown in Fig. 2 that is fixed to a central axis of orifice 1 by its four attachment legs 2, and multiple blades 5 disposed on an outer periphery of motor shaft 4 of motor 3 at predetermined intervals.
  • blades 5 are attached to attachment plate 6 shown in Fig. 3 that is provided on the outer periphery of motor shaft 4. More specifically, attachment plate 6 has multiple attachment parts 7 on its outer periphery at predetermined intervals, and each blade 5 is attached to each attachment part 7.
  • blade 5 has a substantially-rectangular shape whose inner side 5a is facing motor shaft 4 and outer side 5b is facing orifice 1 at the outer periphery.
  • front side 5c linking inner side 5a and outer side 5b has first protrusion 12A in its middle part.
  • First protrusion 12A protrudes in the rotating direction (a direction of arrow in the drawing).
  • Front side 5c is moderately curved from first protrusion 12A toward inner side 5a and outer side 5b in a direction opposite to the rotating direction.
  • rear side 5d linking inner side 5a and outer side 5b has second protrusion 12B in its middle part.
  • Second protrusion 12B protrudes in the rotating direction.
  • Rear side 5d is moderately curved from second protrusion 12B toward inner side 5a and outer side 5b in a direction opposite to the rotating direction.
  • the middle parts of front side 5c and rear side 5d are portions between a central part of inner side 5a and outer side 5b of blade 5 and outer side 5b.
  • the substantially-rectangular shape in the above description intends to include shapes whose angles are not all right angles.
  • the moderately-curved shape is, in other words, a substantially-S shape like a waveform. More specifically, if blade 5 is seen from the direction of motor shaft 4, a portion of front side 5c facing outer side 5b, i.e., a curved portion including first protrusion 12A , is curved bulging in the rotating direction of blade 5. A portion of front side 5c facing inner side 5a is curved inward against the rotating direction of blade 5. Blade 5 is thus S shaped.
  • blade 5 has the next shape.
  • line 11 linking a corner of front side 5c and outer side 5b and a corner of front side 5c and inner side 5a of blade 5 is shifted in a parallel fashion to center 5e, line 11 is tilted at angle ⁇ of about 5 ° in the blade rotating direction, relative to center line 10 linking the rotating center and center 5e of blade 5.
  • blade 5 is curved from center line 10 toward front side 5c and rear side 5d, i.e., facing motor 3 in Fig. 1 or Fig. 2 .
  • FIG. 5 A specific method of forming a curved shape of blade 5 shown in Fig. 5 is briefly described below with reference to Fig. 6 .
  • substantially-rectangular blade 5 is placed on lower die 8 with a cylindrical surface shown in a right-hand drawing in Fig. 6 along center line 10 of blade 5 shown in a left-hand drawing in Fig. 6 .
  • upper die 9 is pressed down from above to blade 5 placed on lower die 8.
  • blade 5 into the surface shape of lower die 8.
  • blade 5 is curved from center line 10 of blade 5 shown in the left-hand drawing of Fig. 5 toward front side 5c and rear side 5d.
  • attachment part 7 of attachment plate 6 is formed such that its front side 7a is inclined more toward motor 3 shown in Fig. 1 or Fig. 2 than rear side 7b.
  • blade 5 By attaching blade 5 to attachment part 7 with this inclined shape, blade 5 can be attached to motor shaft 4 such that its front side 5c is inclined more toward motor 3 shown in Fig. 1 or Fig. 2 than rear side 5d.
  • distance X between outer side 5b and orifice 1 at the side of front side 5c is set longer than distance Y between outer side 5b and orifice 1 at the side of rear side 5d. This achieves the air blowing device described in this exemplary embodiment of the present invention.
  • the air blowing device in this exemplary embodiment has substantially-rectangular blades 5.
  • the middle part of front side 5c linking inner side 5a and outer side 5b of blade 5 protrudes in the rotating direction, and the middle part of rear side 5d linking inner side 5a and outer side 5b of blade 5 protrudes in the rotating direction.
  • both front side 5c and rear side 5d of blade 5 have first protrusion 12A and second protrusion 12B in their middle parts protruding in the rotating direction.
  • Blade 5 is moderately curved from first protrusion 12A and second protrusion 12B toward inner sides 5a and outer side 5b to the side opposite to the rotating direction.
  • the rotating blades and air come into collision and separate gradually from first protrusion 12A and second protrusion 12B to inner side 5a and outer side 5b. Therefore, the air smoothly flows along the curved shape of blade.
  • the front side of blade is inclined more toward the motor than the rear side. In this shape, the air flows in the rotating direction along the inclined shape of blade. Therefore, a disturbed flow is unlikely generated in the air. As a result, air resistance that each blade 5 receives during rotation can be reduced, and thus power consumption can be reduced.
  • the blades in this exemplary embodiment are formed setting distance X between outer side 5b and orifice 1 at the side of front side 5c longer than distance Y between outer side 5b and orifice 1 at the side of rear side 5d. Therefore, the blades gradually come into collision with air in the same way as described above. As a result, air resistance that each blade 5 receives during rotation can be reduced, and thus power consumption can be reduced.
  • distance Y between outer side 5b and orifice 1 at the side of rear side 5d is set shorter than distance X between outer side 5b and orifice 1 at the side of front side 5c.
  • outer diameter of blade 5 is enlarged. This broadens a contact area of the blades and air, and thus a large air blowing volume can be secured. Based on the above examination, air resistance that the blades receive is assumed to reduce.
  • outer side 7c of attachment part 7 in attachment plate 6 is disposed closer to inner side 5a of blade 5 than from first protrusion 12A in the middle part of front side 5c and second protrusion 12B in the middle part of rear side 5d of blade 5.
  • the power consumption of the air blowing device with the structure described above is about 400W compared to power consumption of 600 W needed for the conventional air blowing device, for example, with simple rectangular blades when their air blowing volumes are the same.
  • the air blowing device with the blade shape in this exemplary embodiment can reduce power consumption for about 200 W.
  • the exemplary embodiment achieves the air blowing device with less power consumption.
  • the exemplary embodiment refers to the blades in which the front side is inclined more toward the motor than the rear side.
  • the present invention is not limited to this structure.
  • the front side may not be particularly inclined. This can improve productivity of blades, and reduce production costs.
  • the exemplary embodiment refers to an example of setting distance X between outer side 5b and orifice 1 at the side of front side 5c longer than distance Y between outer side 5b and orifice 1 at the side of rear side 5d of the blade.
  • the present invention is not limited to this structure.
  • distance X and distance Y may be the same. This can reduce power consumption more than the conventional air blowing device.
  • the exemplary embodiment refers to an example of attaching the blades to the attachment plate and then attaching to the motor shaft of the motor.
  • the present invention is not limited to this structure.
  • the attachment plate and the blades may be integrally fabricated, and this may be attached to the motor shaft. This improves assembly productivity of the air blowing device, and can also reduce production costs.
  • it can prevent attachment parts 7 of attachment plate 6 from hindering the action and effect achieved by the blade shape.
  • the exemplary embodiment refers to an example of making line 11 linking corners of the outer side and inner side at the side of the front side in the rotating direction tilted at about 5 ° relative to center line 10.
  • the present invention is not limited to this angle.
  • the tilt angle may be about 2 ° to 10 °.
  • the angle can be designed as required depending on a required shape or characteristics of an air blowing device.
  • the air blowing device of the present invention is broadly applicable to diversifying purposes typically in agricultural affairs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
EP10835623A 2009-12-07 2010-03-11 Air blowing device Withdrawn EP2511533A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009277297A JP5540674B2 (ja) 2009-12-07 2009-12-07 送風装置
PCT/JP2010/001731 WO2011070691A1 (ja) 2009-12-07 2010-03-11 送風装置

Publications (1)

Publication Number Publication Date
EP2511533A1 true EP2511533A1 (en) 2012-10-17

Family

ID=44145260

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10835623A Withdrawn EP2511533A1 (en) 2009-12-07 2010-03-11 Air blowing device

Country Status (4)

Country Link
EP (1) EP2511533A1 (ja)
JP (1) JP5540674B2 (ja)
CN (1) CN102648353B (ja)
WO (1) WO2011070691A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100032258A1 (it) * 2021-12-22 2023-06-22 Cofimco Srl Pala di ventilatore assiale industriale

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102644967A (zh) * 2012-04-16 2012-08-22 广东美的制冷设备有限公司 空调器室内机
JP6076286B2 (ja) * 2014-03-27 2017-02-08 三菱電機株式会社 軸流送風機、換気装置及び冷凍サイクル装置
CN107747763A (zh) * 2017-09-25 2018-03-02 青岛海尔空调器有限总公司 空调室内机

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53116513A (en) * 1977-03-22 1978-10-12 Aisin Seiki Co Ltd Flexible fan
JPS59138800A (ja) * 1983-01-31 1984-08-09 Hitachi Ltd 軸流羽根車
JPS63183395U (ja) * 1987-05-11 1988-11-25
JP2809442B2 (ja) * 1989-08-30 1998-10-08 カルソニック株式会社 自動車の熱交換器用冷却ファン
JP2838955B2 (ja) * 1993-03-30 1998-12-16 株式会社デンソー 送風装置
JP2902577B2 (ja) * 1995-08-29 1999-06-07 松下電工株式会社 プロペラファン
JPH1193897A (ja) * 1997-09-17 1999-04-06 Nippon Spindle Mfg Co Ltd 送風機用羽根
DE69934489T2 (de) * 1999-09-07 2007-04-26 Lg Electronics Inc. Axiallüfter für Klimaanlage
JP2004052709A (ja) 2002-07-23 2004-02-19 Mitsubishi Electric Corp 農事用大型送風機
JP4871067B2 (ja) * 2006-08-11 2012-02-08 株式会社クボタ 送風機構

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011070691A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100032258A1 (it) * 2021-12-22 2023-06-22 Cofimco Srl Pala di ventilatore assiale industriale
WO2023119168A1 (en) * 2021-12-22 2023-06-29 Cofimco S.R.L. Industrial axial fan blade

Also Published As

Publication number Publication date
JP2011117407A (ja) 2011-06-16
JP5540674B2 (ja) 2014-07-02
CN102648353A (zh) 2012-08-22
WO2011070691A1 (ja) 2011-06-16
CN102648353B (zh) 2014-12-24

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