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WO2012137405A1 - Ventilateur de plafond - Google Patents

Ventilateur de plafond Download PDF

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Publication number
WO2012137405A1
WO2012137405A1 PCT/JP2012/001486 JP2012001486W WO2012137405A1 WO 2012137405 A1 WO2012137405 A1 WO 2012137405A1 JP 2012001486 W JP2012001486 W JP 2012001486W WO 2012137405 A1 WO2012137405 A1 WO 2012137405A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
ceiling fan
radius
rotation
angle
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.)
Ceased
Application number
PCT/JP2012/001486
Other languages
English (en)
Japanese (ja)
Inventor
拓也 小棚木
篤 長田
務 加藤
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 WO2012137405A1 publication Critical patent/WO2012137405A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • F04D25/088—Ceiling fans
    • 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

Definitions

  • the present invention relates to a ceiling fan.
  • the conventional ceiling fan used by attaching to the ceiling surface has optimized the installation angle according to the peripheral speed in the radial direction of each blade. Therefore, the ceiling fan has low power consumption, and a high air volume is obtained (see, for example, Patent Document 1).
  • FIG. 7 is a perspective view showing a conventional ceiling fan.
  • the main body 101 includes a ceiling fan motor 103, a ceiling mounting portion 104, a plurality of twisted blades 105, and a hub portion 106.
  • the ceiling fan motor 103 rotates around the rotation shaft 102.
  • the ceiling attaching part 104 attaches the main body 101 to the ceiling.
  • the plurality of twisted blades 105 are attached to the hub portion 106.
  • the hub portion 106 becomes the rotation center of the twisted blade 105.
  • the main body 101 has a diameter of 1500 mm.
  • FIG. 8 is a perspective view showing a twisted blade of a conventional ceiling fan.
  • the twisted blade 105 is a flat blade, and has a structure in which the blade is continuously twisted from the root (RE) to the tip (TE). Further, the twisting blade 105 has a positive pressure surface that is concave and a negative pressure surface that is curved convexly. The length of the chord connecting the leading edge (LE) and the trailing edge (TRE) of the twisted blade 105 gradually decreases from RE to TE. 8 shows a cylindrical cross section having an arbitrary radius around the rotation axis 102 of the twisted blade 105.
  • the distance (D1) of the twisted blade 105 is 612 mm
  • the distance (D2) obtained by equally dividing D1 by the five intermediate surfaces (RS) is 102 mm.
  • the blade angle which is the angle formed by the straight line connecting LE and TRE on the cylindrical cross section having an arbitrary radius around the rotation axis 102, and the rotation plane (horizontal plane) is 32 ° at RE and at TE 5 °.
  • the twisted blade 105 adopting the blade angle corresponding to the peripheral speed generates a flow in a direction perpendicular to the blade rotation surface like a general axial fan. Efficient boosting is possible.
  • the airflow direction on the suction side is obliquely transverse to the rotation surface, and the airflow direction on the blowout side is perpendicular to the blade rotation surface.
  • the blade angle corresponding to the peripheral speed is adopted, there is a problem that the pressure increasing action particularly performed on the blade root side affects the pressure loss increase at the time of air flow suction and causes the fan efficiency to decrease.
  • the present invention provides a mounting portion that fixes one end of a rotating shaft to a ceiling surface, an electric motor that rotates around the rotating shaft, a rotating body that includes all or part of the electric motor, and a plurality of motors that are fixed to the electric motor or the rotating body.
  • the blade In a ceiling fan having a blade and rotating with the electric motor and the blade rotates, the blade is a front edge that is an edge on the direction of rotation and a rear edge that is an edge on the opposite side to the direction of rotation
  • a blade connecting the leading edge and the trailing edge of the cylindrical cross section of the blade at an arbitrary ceiling fan radius centered on the rotation axis, with the horizontal length from the center of the rotation axis to the tip of the blade as the ceiling fan radius
  • FIG. 1 is a perspective view showing a ceiling fan according to an embodiment of the present invention.
  • FIG. 2 is a front perspective view showing the ceiling fan.
  • FIG. 3 is a diagram for explaining the blade angle of the ceiling fan.
  • FIG. 4 is a top view of the blades of the ceiling fan.
  • FIG. 5 is a cross-sectional view of the blades at five arbitrary positions of the ceiling fan.
  • FIG. 6 is a perspective view including a cross section at an arbitrary position of the blade of the ceiling fan.
  • FIG. 7 is a perspective view showing a conventional ceiling fan.
  • FIG. 8 is a perspective view showing twisted blades of the ceiling fan.
  • FIG. 1 is a perspective view showing a ceiling fan according to an embodiment of the present invention.
  • the ceiling fan 10 includes a mounting portion 1, an electric motor 2, a rotating body 3, and a plurality of blades 4, and the blades 4 rotate together with the electric motor 2 to blow air.
  • the attaching portion 1 fixes one end 1b of the rotating shaft 1a to the ceiling surface 5.
  • the electric motor 2 rotates around the rotation shaft 1a.
  • the rotating body 3 contains all or part of the electric motor 2.
  • the plurality of blades 4 are fixed to the electric motor 2 or the rotating body 3.
  • the ceiling fan 10 has a diameter of 1500 mm.
  • FIG. 2 is a front perspective view showing the ceiling fan according to the embodiment of the present invention.
  • the blade 4 has a front edge 4b that is an edge on the rotation direction 4a side and a rear edge 4c that is an edge on the opposite side to the rotation direction 4a. That is, the blade 4 collides with air from the front edge 4b.
  • the horizontal length from the rotating shaft 1 a to the tip 4 e of the blade 4 is a ceiling fan radius 6.
  • FIG. 3 is a diagram for explaining the blade angle of the ceiling fan according to the embodiment of the present invention.
  • FIG. 3 shows a cross-sectional shape of the blade 4 on a cylindrical cross section around the rotation shaft 1a shown in FIG.
  • 2 shows two cross sections with the cross sectional shape of the blade 4. The angle formed by the chord 7 connecting the leading edge 4b and the trailing edge 4c at an arbitrary position 6a of the ceiling fan radius 6 shown in FIG. 2 with the horizontal plane shown in FIG.
  • the blade angle 8 at the position 6b near the half of the ceiling fan radius 6 is maximized, and the length of the chord 7 is maximized. Further, the difference between the minimum value and the maximum value of the blade angle 8 at an arbitrary position 6a is 6 ° or more and 20 ° or less.
  • the difference between the minimum value and the maximum value of the blade angle 8 is less than 6 °, the pressure increasing action at the half neighboring position 6b and the pressure raising action of the blade 4 on the inner peripheral side from the half neighboring position 6b.
  • the difference of becomes smaller. Therefore, when the pressure increasing action on the inner peripheral side of the blade 4 is increased, the pressure loss at the time of the air suction of the ceiling fan 10 is increased, and the fan efficiency is decreased.
  • the difference between the minimum value and the maximum value of the blade angle 8 is larger than 20 °, the blade 4 is locally boosted at the half vicinity position 6b. For this reason, the pressure increasing action on the outer peripheral side with respect to the half vicinity position 6b is reduced, and the fan efficiency is lowered.
  • the blade angle 8 at an arbitrary position 6a 225 mm. Is 15.0 °.
  • the half vicinity position 6b is 50% or more and 70% or less of the ceiling fan radius 6.
  • the half vicinity position 6b is smaller than 50% of the ceiling fan radius 6, the pressure loss at the time of airflow suction increases due to the pressure increasing action on the inner peripheral side of the blade 4, and the fan efficiency decreases.
  • the half vicinity position 6b is larger than 70% of the ceiling fan radius 6, the resistance (drag) received by the half vicinity position 6b increases, and the fan efficiency similarly decreases.
  • the maximum value of the blade angle 8 and the length of the chord 7 is at a position 6 b near the half of the ceiling fan radius 6, so that the ceiling gap serving as the suction area of the ceiling fan 10 is obtained.
  • the increase in pressure loss is suppressed.
  • the ceiling fan 10 is improved in energy capacity with low axial power, so that it is excellent in energy saving and has a high wind speed and a high refreshing feeling.
  • FIG. 4 is a top view of the blades of the ceiling fan according to the embodiment of the present invention
  • FIG. 5 is a cross-sectional view of the blades at five arbitrary positions of the ceiling fan.
  • the blade angle 8 and the length of the chord 7 shown in FIG. 3 gradually decrease from the half vicinity position 6 b to the tip 4 e of the blade 4.
  • the drag at the outer peripheral side of the blade 4 is reduced, so that the work amount at the half vicinity position 6b of the blade 4 with respect to the input increases. Therefore, the maximum wind speed value downstream of the ceiling fan 10 is improved, the energy saving is excellent, the wind speed is high, and a high refreshing feeling is obtained.
  • FIG. 6 is a perspective view including a cross section at an arbitrary position of the blade of the ceiling fan according to the embodiment of the present invention.
  • the cross section of the blade 4 in the thickness direction 4f has a substantially airfoil shape, the air resistance of the blade 4 during rotation is reduced, and the work of the blade 4 with respect to input increases. Therefore, the ceiling fan 10 according to the embodiment of the present invention is excellent in energy saving and has a high wind speed and a high refreshing feeling.
  • the maximum thickness portion 9a in the cross section in the thickness direction 4f at the root 4d of the blade 4 is larger than the maximum thickness portion 9b in the cross section in the thickness direction 4f at the tip 4e of the blade 4.
  • the maximum thickness portion 9a on the base 4d side is 8 mm
  • the maximum thickness portion 9b on the tip 4e side is 6 mm.
  • the air blowing performance of the blade 4 is maintained and the strength of the blade 4 is increased, so that the ceiling fan 10 having excellent safety is provided.
  • the performance of the ceiling fan 10 (improved model) shown in the embodiment of the present invention was measured. Moreover, the ceiling fan continuously twisted from the root 4d to the tip 4e of the conventional blade 4 was used as a comparative model.
  • Table 2 shows the parameters of the improvement model and the comparison model.
  • Table 3 shows the results of measuring the ceiling fan of the improved model and the comparative model based on the IEC (International Electrotechnical Commission) standard.
  • the motor of the ceiling fan product number: V60WK, rated voltage 240V
  • Panasonic Ecosystems company was used for the motor.
  • both the maximum wind speed and the air volume increased in the improved model compared to the comparative model.
  • the maximum wind speed refers to the maximum value of the wind speed value used for calculating the ceiling fan according to the IEC standard, and is an index indicating the refreshing feeling due to the airflow.
  • the ceiling fan of the present invention is expected to be used for home use and office use.

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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 un ventilateur de plafond qui souffle de l'air par la rotation de pales et qui comporte une section de montage, un moteur électrique, un corps de rotation et une pluralité de pales. Les pales sont dotées d'un bord d'attaque et d'un bord de fuite ; la longueur horizontale du centre de l'axe de rotation au bout de chaque pale représente le rayon du ventilateur de plafond ; si l'angle de pale est l'angle formé par le plan horizontal et une corde qui joint le bord d'attaque au bord de fuite d'une coupe cylindrique d'une pale à un rayon donné du ventilateur de plafond avec l'axe de rotation comme centre, l'angle de pale à une position proche du milieu du rayon du ventilateur de plafond est à son maximum et la longueur de la corde est à son maximum ; et la différence entre les angles de pale minimal et maximal, à un rayon donné du ventilateur de plafond, se situe entre 6° et 20°.
PCT/JP2012/001486 2011-04-06 2012-03-05 Ventilateur de plafond Ceased WO2012137405A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011084287 2011-04-06
JP2011-084287 2011-04-06

Publications (1)

Publication Number Publication Date
WO2012137405A1 true WO2012137405A1 (fr) 2012-10-11

Family

ID=46968823

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/001486 Ceased WO2012137405A1 (fr) 2011-04-06 2012-03-05 Ventilateur de plafond

Country Status (1)

Country Link
WO (1) WO2012137405A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106151105A (zh) * 2016-08-03 2016-11-23 华中科技大学 一种轴流叶型
CN106351878A (zh) * 2016-09-28 2017-01-25 华中科技大学 一种轴流掠形叶片
CN106678002A (zh) * 2016-11-28 2017-05-17 哈尔滨工大金涛科技股份有限公司 一种风力机叶片及叶片加工方法
WO2018198471A1 (fr) * 2017-04-25 2018-11-01 株式会社ブリヂストン Bandage pneumatique
US11193502B2 (en) * 2015-12-14 2021-12-07 Hunter Fan Company Ceiling fan

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006226118A (ja) * 2005-02-15 2006-08-31 Matsushita Electric Ind Co Ltd 送風装置
JP2007170292A (ja) * 2005-12-22 2007-07-05 Matsushita Electric Ind Co Ltd 送風装置
JP2008121552A (ja) * 2006-11-13 2008-05-29 Matsushita Electric Ind Co Ltd シーリングファン
JP2008215248A (ja) * 2007-03-06 2008-09-18 Matsushita Electric Ind Co Ltd 天井扇
JP2009257142A (ja) * 2008-04-15 2009-11-05 Panasonic Corp 天井扇風機

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006226118A (ja) * 2005-02-15 2006-08-31 Matsushita Electric Ind Co Ltd 送風装置
JP2007170292A (ja) * 2005-12-22 2007-07-05 Matsushita Electric Ind Co Ltd 送風装置
JP2008121552A (ja) * 2006-11-13 2008-05-29 Matsushita Electric Ind Co Ltd シーリングファン
JP2008215248A (ja) * 2007-03-06 2008-09-18 Matsushita Electric Ind Co Ltd 天井扇
JP2009257142A (ja) * 2008-04-15 2009-11-05 Panasonic Corp 天井扇風機

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11193502B2 (en) * 2015-12-14 2021-12-07 Hunter Fan Company Ceiling fan
US11525462B2 (en) 2015-12-14 2022-12-13 Hunter Fan Compnay Ceiling fan
US11668327B2 (en) 2015-12-14 2023-06-06 Hunter Fan Company Ceiling fan
US11788556B2 (en) 2015-12-14 2023-10-17 Hunter Fan Company Ceiling fan
CN106151105A (zh) * 2016-08-03 2016-11-23 华中科技大学 一种轴流叶型
CN106151105B (zh) * 2016-08-03 2018-07-06 华中科技大学 一种轴流叶型
CN106351878A (zh) * 2016-09-28 2017-01-25 华中科技大学 一种轴流掠形叶片
CN106678002A (zh) * 2016-11-28 2017-05-17 哈尔滨工大金涛科技股份有限公司 一种风力机叶片及叶片加工方法
CN106678002B (zh) * 2016-11-28 2023-10-20 哈尔滨工大金涛科技股份有限公司 一种风力机叶片及叶片加工方法
WO2018198471A1 (fr) * 2017-04-25 2018-11-01 株式会社ブリヂストン Bandage pneumatique
JP2018184058A (ja) * 2017-04-25 2018-11-22 株式会社ブリヂストン 空気入りタイヤ
CN110573352A (zh) * 2017-04-25 2019-12-13 株式会社普利司通 充气轮胎

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