WO2007108342A1 - 多翼ファン - Google Patents
多翼ファン Download PDFInfo
- Publication number
- WO2007108342A1 WO2007108342A1 PCT/JP2007/054767 JP2007054767W WO2007108342A1 WO 2007108342 A1 WO2007108342 A1 WO 2007108342A1 JP 2007054767 W JP2007054767 W JP 2007054767W WO 2007108342 A1 WO2007108342 A1 WO 2007108342A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blade
- main plate
- angle
- multiblade fan
- fan according
- Prior art date
Links
- 238000009423 ventilation Methods 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000007423 decrease Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
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
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
- F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
-
- 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
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade
Definitions
- the present invention relates to a multiblade fan that is mainly installed on a ceiling and used as a ventilation fan.
- this type of multiblade fan is known to have an orifice having a bell mouth-like suction port.
- Patent Document 1 The multiblade fan will be described below with reference to FIGS.
- a multiblade fan 101 is provided with an opening 103 in a main plate 102, an upper blade 105 on the side plate 104 side of the main plate 102, and a lower blade on the opposite side of the side plate 104 of the main plate 102.
- the cross-sectional shape is different from the 106.
- the intake air passes through the suction hole 108 of the orifice 107, and is pressurized by the lower blade 106 when the air pressure is low and high, and the upper blade 105 when the air pressure is high and the air volume is low. Is boosted.
- the lower blade 106 is different from the upper blade 105 in one or both of the entrance angle and the exit angle. As a result, a high performance multi-blade fan can be obtained.
- Patent Document 1 Japanese Patent No. 3507758
- the multiblade fan of the present invention has a spiral casing provided with a bell mouth-like suction port and discharge port on one side, an electric motor disposed inside the casing, and a vertical axis to the rotating shaft of the electric motor.
- a main plate having ventilation holes and a first block disposed on the suction port side of the main plate.
- a second blade disposed on the opposite side of the main plate from the suction port.
- the diameter of the main plate is larger than the inner diameter of the first blade and the second blade smaller than the outer diameter of the first blade and the outer diameter of the second blade, and larger than the inner diameter of the second blade.
- the exit angle of one or both of the second blade and the second blade is configured to change sequentially in the axial direction.
- the present invention can provide a multiblade fan that increases the difference in the rotational speed between the low pressure and high air flow rate and the high pressure and low air flow rate, and facilitates constant air flow control.
- FIG. 1 is a schematic side view of a multiblade fan according to Embodiment 1 of the present invention.
- FIG. 2 is a perspective view of the multiblade fan according to Embodiment 1 of the present invention.
- FIG. 3 is a detailed view of a blade of a multiblade fan according to Embodiment 1 of the present invention.
- FIG. 4 is a front view of the multiblade fan according to Embodiment 1 of the present invention.
- FIG. 5 is a schematic side view of a multiblade fan according to Embodiment 2 of the present invention.
- FIG. 6 is a perspective view of a multiblade fan according to Embodiment 2 of the present invention.
- FIG. 7 is a detailed blade diagram of a multiblade fan according to Embodiment 2 of the present invention.
- FIG. 8 is a schematic side view of a multiblade fan according to Embodiment 3 of the present invention.
- FIG. 9 is a perspective view of a multiblade fan according to Embodiment 3 of the present invention.
- FIG. 10 is a detailed blade diagram of a multiblade fan according to Embodiment 3 of the present invention.
- FIG. 11 is a schematic side view of a multiblade fan according to Embodiment 4 of the present invention.
- FIG. 12 is a perspective view of a multiblade fan according to Embodiment 4 of the present invention.
- FIG. 13 is a detailed blade diagram of a multiblade fan according to Embodiment 4 of the present invention.
- FIG. 14 is a detailed blade diagram of a multiblade fan according to Embodiment 5 of the present invention.
- FIG. 15 is a front view of a multiblade fan according to Embodiment 5 of the present invention.
- FIG. 16 is a schematic side view of a conventional multiblade fan.
- FIG. 17 is a front view of a conventional multiblade fan.
- FIG. 1 is a schematic side view showing a multiblade fan according to Embodiment 1 of the present invention
- FIG. 2 is a perspective view thereof
- FIG. 3 is a detailed view of the blade
- FIG. 4 is a front view thereof.
- the multiblade fan 1 has a spiral casing 4, and the casing 4 includes a bell mouth-like suction port 2 and a discharge port 3 on one side. Yes.
- the multiblade fan 1 further includes an electric motor 5 as a driving device inside a casing 4, and is disposed on the main plate 7 perpendicular to the rotating shaft 6 of the electric motor 5 and the suction port 2 side of the main plate 7.
- a plurality of suction blades (referred to as first blades) 8 and a plurality of blades (referred to as second blades) 9 disposed on the side opposite to the suction port 2 side.
- a ring-shaped side plate 10 is disposed on the suction port 2 side of the outer peripheral portion of the first blade 8.
- the main plate 7 is provided with a ventilation hole 11 provided in a fan shape so that an air flow flows from the first blade 8 side to the second blade 9 side.
- the inner and outer diameters of the first blade 8 and the second blade 9 are the same.
- the diameter D of the main plate 7 is set smaller than the outer diameter D2 of the first blade 8 and the second blade 9, and larger than the inner diameter D1.
- the above-described ring-shaped side plate 10 is not limited to the one disposed on the suction port 2 side of the first blade 8. It may be placed on the second blade 9 or on both the first blade 8 and the second blade 9.
- the exit angle of each blade is defined as follows.
- the exit angle is the angle between the extended straight line of the blade center line and the lower side in the rotational direction of the outer circumference circle at the intersection of the outer circumference circle of the blade and the center line of the blade on a cross section perpendicular to the rotation axis. .
- the outlet angle of the first blade 8 is sequentially changed in the axial direction, the outlet angle ⁇ 2 on the suction port 2 side, the outlet angle ⁇ 6 on the main plate 7 side, and the outlet angle j8 6 It is set larger than the angle ⁇ 2.
- the average outlet angle j8 0, which is the average of the outlet angle ⁇ 2 on the suction inlet 2 side and the outlet angle ⁇ 6 on the main plate 7 side, is generally used for ordinary multi-blade fans where the blade outlet angle is constant in the axial direction. The range is from 150 degrees to 160 degrees.
- 84 of the second blade 9 is constant without changing in the axial direction.
- This exit angle ⁇ 4 is set smaller than the exit angle ⁇ 6 of the first blade 8 on the main plate 7 side.
- the fan is operated at the same voltage with the small electric motor 5, the load received from the fan is large at low pressure, so the rotational speed decreases. At high pressure, the load that receives the fan force is also small, so the rotational speed is lower than at low pressure. To rise. The number of rotations is detected to determine the pressure state applied to the fan. If it is determined that the pressure is low, the voltage of the motor 5 is decreased. If it is determined that the pressure is high, the voltage of the motor 5 is increased. Let As a result, the desired air volume is set regardless of the pressure. Since the pressure state is sensed by the number of revolutions in this way, constant air volume control is easier when the difference between the number of revolutions at low and high pressures is as large as possible. In some cases, the detection target is a voltage or current that depends on the rotational speed other than the rotational speed.
- the air flow sucked into the multiblade fan 1 usually flows to the side plate 10 side at high pressure, and flows to the main plate 7 side at low pressure and high air volume. However, since the airflow does not pass through the ventilation holes 11 of the main plate 7, the airflow flows most at the suction side of the main plate 7.
- the exit angles j 8 2 and j 8 6 of the first blade 8 and the exit angle j 8 4 of the second blade 9 will be considered.
- the load increases because the outlet angle ⁇ 6 on the main plate 7 side of the first blade 8 is larger than the average outlet angle ⁇ 0. Therefore, when the electric motor 5 is rotated at the average outlet angle ⁇ 0 at the same voltage as the constant fan, the number of rotations becomes smaller than the constant fan at the average outlet angle j80.
- the load becomes small because the exit angle / 32 of the first blade 8 is smaller than the average exit angle / 30. Therefore, when the electric motor 5 is rotated at the average outlet angle ⁇ 0 at the same voltage as the constant fan, the rotational speed becomes larger than the constant fan rotational speed at the average outlet angle ⁇ 0.
- the second blade The exit angle ⁇ 4 is smaller than the exit angle / 36 of the first blade 8.
- the drive voltage of the electric motor 5 is a normal commercial voltage, for example, 100V or 200V.
- 84 is a constant force. If the structure is changed sequentially in the axial direction as in the case of the first blade 8, the difference in the number of rotations is further increased. Constant air volume control becomes easy and an efficient multiblade fan can be obtained.
- FIG. 5 is a schematic side view showing the multiblade fan according to Embodiment 2 of the present invention
- FIG. 6 is a perspective view thereof
- FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
- the entrance angle of each blade is defined as follows.
- the entrance angle is the angle between the extension line of the blade center line and the upper side in the rotational direction of the inner circle at the intersection of the blade inner circle and the blade center line on the cross section perpendicular to the rotation axis. It is.
- the entrance angle 131 of the first blade 8 is set in the range of 70 degrees to 90 degrees.
- the entrance angle 133 of the second blade 9 is set in the range of 50 to 80 degrees and smaller than the entrance angle 131. As described above, both the entrance angle ⁇ 1 and the entrance angle ⁇ 3 are constant without changing in the axial direction, and thus it is possible to mold in the axial direction.
- the air flow reaching the second blade 9 from the ventilation hole 11 of the main plate 7 is less in both cases of low pressure and high pressure, and accordingly the exit angle of the second blade 9
- the voltage of the same voltage is a normal commercial voltage, for example, 100V or 200V.
- FIG. 8 is a schematic side view showing a multiblade fan according to Embodiment 3 of the present invention
- FIG. 9 is a perspective view thereof
- FIG. 10 is a detailed view of blades thereof.
- the same components as those in the first embodiment or the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
- the number of second blades 9 on the side opposite to the suction port is smaller than the number of first blades 8 on the suction port side. Others are the same as in the first embodiment.
- the air flow sucked into the multiblade fan 1 usually flows to the side plate 10 side at high pressure, and flows to the main plate 7 side at low pressure and high air volume. However, since the airflow does not pass through the ventilation holes 11 of the main plate 7, the airflow flows most at the suction side of the main plate 7.
- the number of second blades 9 is set to 20 to 40 smaller than the usual general number of 40 to 60. Therefore, depending on the amount of air flow, the load is reduced at both low and high pressures, and fan efficiency is improved.
- the effect of facilitating the control of constant air volume is the same because the first blade 8 is twisted in the axial direction, and the difference in the rotational speed of the same motor increases between low pressure and high pressure.
- FIG. 11 is a schematic side view showing a multiblade fan according to Embodiment 4 of the present invention
- FIG. 12 is a perspective view thereof
- FIG. 13 is a detailed view of a blade thereof.
- the same components as those in the first to third embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
- the inner diameters of the first blade 8 and the second blade 9 are different in size in the vertical direction of the main plate 7. That is, the inner diameter D3 of the second blade 9 is larger than the inner diameter D8 of the first blade 8. Others are the same as in the first embodiment.
- the electric motor 5 is disposed at the center of the second blade 9, the flow of the suction port 2 force hardly flows to the second blade 9. Therefore, since the inner diameter D3 of the second blade 9 is larger than the inner diameter of 0.85, which is the ratio of the inner diameter to the normal general outer diameter, the air flow smoothly enters the second blade 9. As a result, the second blade 9 also acts effectively and can be an efficient multi-blade fan, particularly when the air flow is low pressure and high air flow that tends to flow downward.
- FIG. 14 is a detailed blade diagram of a multiblade fan according to Embodiment 5 of the present invention
- FIG. 15 is a front view showing the multiblade fan. Note that the first blade 8 in FIG. 15 shows a cross section of only a portion where the exit angle is the average exit angle j80 for ease of explanation.
- the same components as those in Embodiments 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the first blade 8 and the second blade 9 are made of a material that easily deforms at a portion larger than the diameter of the main plate 7 on the outer shape side. As a result, the first blade 8 and the second blade 9 are swept by centrifugal force or wind pressure as the rotational speed increases, and the exit angle becomes smaller. The rest is the same as in the first embodiment.
- the multi-blade fan 1 normally has a large load when the air pressure is low and high, and decreases when the air pressure is high and low. As a result, with the same voltage and the same motor, the rotation speed is small when the air pressure is low and high. Thus, when the high pressure and the low air flow rate, the rotation speed becomes large.
- the drive voltage of the electric motor is a normal commercial voltage, for example, 100V or 200V.
- the load decreases and the rotational speed increases further.
- the load decreases, and the increase in rotational speed increases.
- the blade material can be deformed so that the exit angle is reduced by centrifugal force and wind pressure while maintaining strength, for example, metal such as thin aluminum of about 0.3 mm, or polypropylene of about 0.3 mm, etc. And the like.
- the present invention is a multi-blade fan that is mainly installed on a ceiling and used as a ventilation fan, and is useful for an application that requires constant air volume control.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/096,656 US8221069B2 (en) | 2006-03-17 | 2007-03-12 | Multi-blade fan |
CN2007800017640A CN101360916B (zh) | 2006-03-17 | 2007-03-12 | 多叶片风扇 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-073810 | 2006-03-17 | ||
JP2006073810 | 2006-03-17 | ||
JP2006-184046 | 2006-07-04 | ||
JP2006184046 | 2006-07-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007108342A1 true WO2007108342A1 (ja) | 2007-09-27 |
Family
ID=38522375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/054767 WO2007108342A1 (ja) | 2006-03-17 | 2007-03-12 | 多翼ファン |
Country Status (3)
Country | Link |
---|---|
US (1) | US8221069B2 (ja) |
CN (1) | CN101360916B (ja) |
WO (1) | WO2007108342A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101975188A (zh) * | 2010-10-30 | 2011-02-16 | 芜湖博耐尔汽车电气系统有限公司 | 一种汽车空调用离心风机叶轮 |
Families Citing this family (21)
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---|---|---|---|---|
JP5287772B2 (ja) * | 2010-03-16 | 2013-09-11 | 株式会社デンソー | 遠心式多翼ファン |
US9145897B2 (en) * | 2011-10-04 | 2015-09-29 | Asia Vital Components Co., Ltd. | Blade structure for centrifugal fan |
US9267507B2 (en) * | 2011-10-05 | 2016-02-23 | Asia Vital Components Co., Ltd. | Blade structure for centrifugal fan |
JP5879363B2 (ja) * | 2011-11-28 | 2016-03-08 | 日立アプライアンス株式会社 | 多翼ファン及びこれを備えた空気調和機 |
JP5933891B2 (ja) | 2011-12-22 | 2016-06-15 | メガ・フルイド・システムズ・インクMega Fluid Systems, Inc. | 渦低減キャップ |
US20130170942A1 (en) * | 2011-12-28 | 2013-07-04 | Agco Corporation | Multiple Fan Blade Angles in a Single Crossflow Fan |
EP2623793B1 (de) * | 2012-02-02 | 2016-08-10 | MTU Aero Engines GmbH | Strömungsmaschine mit Schaufelgitter |
ITTO20120450A1 (it) | 2012-05-23 | 2013-11-24 | Entsorgafin S P A | Girante per gruppo di ventilazione e gruppo di ventilazione comprendente tale girante. |
US20140072434A1 (en) * | 2012-09-13 | 2014-03-13 | Asia Vital Components Co., Ltd. | Fan impeller structure of centrifugal fan |
DE102012021845A1 (de) * | 2012-10-27 | 2014-04-30 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Lüfter mit einem Lüfterrad |
US9777743B2 (en) * | 2012-11-06 | 2017-10-03 | Asia Vital Components Co., Ltd. | Centrifugal fan impeller structure |
US9777742B2 (en) * | 2012-11-06 | 2017-10-03 | Asia Vital Components Co., Ltd. | Centrifugal fan impeller structure |
US20140157613A1 (en) * | 2012-12-12 | 2014-06-12 | General Electric Company | Fan assembly for an appliance |
JP6204016B2 (ja) * | 2012-12-21 | 2017-09-27 | ミネベアミツミ株式会社 | 遠心送風機 |
DE102013214190A1 (de) * | 2013-07-19 | 2015-01-22 | BSH Bosch und Siemens Hausgeräte GmbH | Wasserführendes Haushaltsgerät mit mit einer ein Spaltrohr aufweisenden Pumpeinheit |
CN105793576B (zh) * | 2013-12-11 | 2018-02-13 | 株式会社京滨 | 离心风扇 |
EP3149336B1 (en) | 2014-05-30 | 2020-08-12 | Almishari, Ibrahim | System and method of a fan |
CN105756993A (zh) * | 2016-04-13 | 2016-07-13 | 海信(山东)空调有限公司 | 一种不等距离心风扇及除湿机 |
JP7043884B2 (ja) * | 2018-02-26 | 2022-03-30 | 日本電産株式会社 | 遠心ファン |
US11885339B2 (en) | 2018-10-30 | 2024-01-30 | Mitsubishi Electric Corporation | Turbo fan, air sending device, air-conditioning device, and refrigeration cycle device |
KR102042387B1 (ko) * | 2019-07-29 | 2019-11-07 | 주식회사 아임 | 헤어드라이기용 비등간격 블레이드를 구비한 고풍량 블로워 팬 |
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JPH062698A (ja) * | 1992-06-18 | 1994-01-11 | Mitsubishi Heavy Ind Ltd | 遠心送風機 |
JP2001115997A (ja) * | 1999-10-14 | 2001-04-27 | Matsushita Seiko Co Ltd | 多翼ファン |
JP2001271791A (ja) * | 2000-03-27 | 2001-10-05 | Matsushita Seiko Co Ltd | 多翼ファン |
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GB2090340B (en) * | 1980-12-31 | 1984-07-18 | Sueddeutsche Kuehler Behr | Radial fan wheel |
JPS59170698U (ja) | 1983-04-30 | 1984-11-15 | 三菱電機株式会社 | 多翼送風機 |
JPS62271995A (ja) | 1986-05-19 | 1987-11-26 | Matsushita Seiko Co Ltd | 多翼型羽根車 |
JPS6375593U (ja) | 1986-11-05 | 1988-05-19 | ||
JP3861402B2 (ja) * | 1997-09-25 | 2006-12-20 | 株式会社デンソー | 遠心多翼ファン |
KR100369919B1 (ko) * | 1999-03-03 | 2003-01-29 | 미쓰비시덴키 가부시키가이샤 | 팬, 팬의 용융금속 성형방법 및 팬의 용융금속 성형장치 |
JP2002357196A (ja) * | 2001-05-30 | 2002-12-13 | Matsushita Seiko Co Ltd | 遠心ファン |
JP3966247B2 (ja) * | 2003-07-15 | 2007-08-29 | 松下電器産業株式会社 | 遠心ファン |
JP2005337052A (ja) | 2004-05-25 | 2005-12-08 | Calsonic Kansei Corp | 送風機 |
-
2007
- 2007-03-12 WO PCT/JP2007/054767 patent/WO2007108342A1/ja active Application Filing
- 2007-03-12 US US12/096,656 patent/US8221069B2/en active Active
- 2007-03-12 CN CN2007800017640A patent/CN101360916B/zh active Active
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JPH062698A (ja) * | 1992-06-18 | 1994-01-11 | Mitsubishi Heavy Ind Ltd | 遠心送風機 |
JP2001115997A (ja) * | 1999-10-14 | 2001-04-27 | Matsushita Seiko Co Ltd | 多翼ファン |
JP2001271791A (ja) * | 2000-03-27 | 2001-10-05 | Matsushita Seiko Co Ltd | 多翼ファン |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101975188A (zh) * | 2010-10-30 | 2011-02-16 | 芜湖博耐尔汽车电气系统有限公司 | 一种汽车空调用离心风机叶轮 |
Also Published As
Publication number | Publication date |
---|---|
CN101360916A (zh) | 2009-02-04 |
CN101360916B (zh) | 2012-09-26 |
US8221069B2 (en) | 2012-07-17 |
US20090162198A1 (en) | 2009-06-25 |
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