EP1624196B1 - Haube und Lüfter mit dieser Haube - Google Patents

Haube und Lüfter mit dieser Haube Download PDF

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Publication number
EP1624196B1
EP1624196B1 EP05015433.5A EP05015433A EP1624196B1 EP 1624196 B1 EP1624196 B1 EP 1624196B1 EP 05015433 A EP05015433 A EP 05015433A EP 1624196 B1 EP1624196 B1 EP 1624196B1
Authority
EP
European Patent Office
Prior art keywords
ring portion
fan
airflow
regulating plate
shroud
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.)
Expired - Fee Related
Application number
EP05015433.5A
Other languages
English (en)
French (fr)
Other versions
EP1624196A2 (de
EP1624196A3 (de
Inventor
Atsunori Hashimoto
Hirotaka Takaba
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.)
Denso Corp
Original Assignee
Denso 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 Denso Corp filed Critical Denso Corp
Publication of EP1624196A2 publication Critical patent/EP1624196A2/de
Publication of EP1624196A3 publication Critical patent/EP1624196A3/de
Application granted granted Critical
Publication of EP1624196B1 publication Critical patent/EP1624196B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • 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
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence

Definitions

  • the present invention relates to a shroud and an axial flow blower using the same, which are suitably used for a radiator of a vehicle, for example. More specifically, the present invention relates to a shroud having an airflow regulating plate, which effectively reduces rotation noise caused by an axial flow fan.
  • IP 2003 343394 A discloses an airflow regulating plate 19 which is provided on both sides of a ring portion 16 in a light-left direction which regulating plate has a circular-arc shape extending continuously from the top end to the bottom end of the shroud.
  • JP 56 162 469 U3 shows a center of a ring portion in an eccentric position with respect to the center of the shroud.
  • JP-A-6-42498 further proposed a shroud in which an airflow regulating plate projects radially towards the inside.
  • This airflow regulating plate is installed in the smaller-area part of the air introducing part of the shroud.
  • This structure is effective for decreasing the rotational noise in the second and fourth frequency ranges (the second and the fourth noise components), but is not effective for decreasing the rotation noise in the first frequency range (the first noise component).
  • a shroud includes a ring portion (210) for surrounding a radial outer rim of an axial flow fan (100) for blowing air, and an air introducing part (220) for introducing air to the ring portion (210).
  • the fan (100) is located opposite to a heat exchanger (1) positioned upstream of the fan (100) in an airflow, and the air introducing part (220) is enlarged from the ring portion (210) towards upstream in the airflow.
  • a center of the ring portion (210) is eccentric with respect to a center of the air introducing part (220).
  • the air introducing part (220) has a large-area part (220a) and a small-area part (220b) which are formed due to the eccentrically located ring portion (210) with respect to the air introducing part (220), and an airflow regulating plate (221) is provided on the large-area part (220a) to project toward an upstream side of the airflow and has a circular-arc shape concentric with the ring portion (210). Accordingly, the airflow regulating plate (221) restricts the air from flowing to the ring portion along the wall surface of the larger-area part (220a) of the air introducing part (220). Therefore, an interference of an axial airflow with the air flowing along the wall surface of the larger-area part can be suppressed.
  • the fan rotation noise in the first frequency range (the first noise component) can be reduced.
  • no opening is provided in the air introducing part (220). Therefore, when this shroud is used for a blower for cooling a heat exchanger, the noise can be effectively reduced without reducing the amount of air flowing towards the heat exchanger.
  • L / D can be set such that 0.34 ⁇ L / D ⁇ 0.44. In this case, the fan rotation noise can be further reduced.
  • R / D can be set such that 0.57 ⁇ R / D ⁇ 0.74.
  • a projecting length (h) of the airflow regulating plate (221) can be set within a range of 7 mm and 12 mm. In this case, the fan rotation noise can be effectively reduced.
  • a plurality of the airflow regulating plates (221) are arranged to be concentric with the ring portion (210).
  • a shroud 200 of the present invention is used for an axial flow blower 10 (an electric fan) for a radiator 1 (heat exchanger).
  • the axial flow blower 10 is formed by assembling an axial flow fan 100 and a motor 300.
  • Figs. 1A and 1B show the structure of the axial flow blower 10.
  • the axial flow blower 10 (hereinafter blower 10) is fixed to the radiator 1 for a vehicle at an engine side with mounting members 230 provided at four corners of the shroud 200.
  • the blower 10 sends cool air to a core portion la of the radiator 1.
  • the blower 10 is an air-intake type blower 10, which draws air from the side of a vehicle grill to the engine side, that is, from the core portion 1a of the radiator 1 to the axial flow fan 100.
  • the axial flow fan 100 (hereinafter fan) is made of polypropylene containing about 20% of glass fiber.
  • a fan boss 110 and blades 120 are integrally formed by an injection molding.
  • the fan boss 110 is cylindrical-shaped with one closed end.
  • a metal insert 111 made of aluminum is insert-formed at the center area of the closed end of the fan boss 110. Further, a shaft slit 112 for receiving a shaft 310 of the motor 300 is provided at the center of the metal insert 111.
  • the outer diameter of the fan 100 is set at 360mm. As to the outer diameter of the fan 100, it is generally set in a range between 250mm and 400mm in accordance with its mountability to the vehicle or required air blowing capabilities.
  • the shroud 200 is made of polypropylene containing about 25% to 30% of glass fiber and is integrally formed with a ring portion 210, an air introducing part 220, the mounting portions 230, etc.
  • the ring portion 210 is provided for surrounding the radial outer rim of the fan 100.
  • a motor supporting portion (not shown) for supporting the motor 300 is provided downstream of the ring portion 210 in the airflow, at the inner diameter side of the ring portion 210.
  • a clearance (e.g., 4mm) is ensured between the fan 100 and the ring portion 210 so as to prevent interference therebetween.
  • the inner diameter D of the ring portion 210 is set at 368mm, as an example.
  • the air introducing part 220 is enlarged smoothly from the ring portion 210 towards the upstream side of the airflow (to the side of the radiator 1).
  • the outline (the outer shape) of the air introducing part 220 is rectangular-shaped to correspond to the shape of the core portion 1a of the radiator 1.
  • the center of the ring portion 210 is eccentrically arranged (here, it is eccentrically arranged at the right part in Fig. 1 ) with respect to the center of the air introducing part 220, so that the shroud 200 is prevented from interfering with other parts provided in the vehicle when it is mounted to the vehicle.
  • the air introducing part 220 is divided into a larger-area part 220a (the left part in Fig. 1A ) and a smaller-area part 220b (the right part in Fig. 1A ), due to the eccentric arrangement of the ring portion 210.
  • the airflow regulating plate 221 is provided on an inner surface of this larger-area part 220a of the air introducing part 220.
  • the airflow regulating plate 221 is circular-arc shaped to be concentric with the ring portion 210.
  • the airflow regulating plate 221 is a plate member having a thickness of 2mm and projects towards upstream in the airflow.
  • the airflow regulating plate 221 can be integrally formed with the larger-area part 220a of the air introducing part 220.
  • the airflow regulating plate 221 is divided into two parts, one is provided upper and the other is provided below in the vertical direction of Fig. 1A .
  • the dimensions of the airflow regulating plate 221 are indicated such that, a length in the circumferential direction is as L , a curvature radius (a length from the center of the ring portion 210 to the outer periphery of the airflow regulating plate 221) is as R and a projecting length is as h .
  • the motor 300 is fixed to the motor supporting portion of the ring portion 210, and shaft 310 of the motor 300 is inserted into the shaft slit 112 of the fan 100 so that the motor 300 is fixed to the fan 100.
  • the motor 300 is a generally known DC ferrite motor and is connected to a controller (not shown).
  • the controller varies an average current value by changing a ratio between ON period and OFF period during which the current is running through the motor 300.
  • an amount of airflow is controlled by varying the rotational speed of the fan 100 which is directly connected to the controller. In the normal use range of the blower 10, the rotational speed is set approximately at 1700 rpm.
  • the fan 100 is rotated by the function of the motor 300 and sends air for cooling towards the core part 1a of the radiator 1 thereby heat radiation from the cooling water of the radiator 1 is promoted.
  • Fig. 5 shows a confirmation result when the blower 10 is attached to the radiator 1 in a state in which the airflow regulating plate 221 is not provided.
  • the fan rotation noise in the first frequency range of approximately 200 Hz (first noise component) occurs noticeably.
  • the first noise component is calculated such that, rotational frequency (28 Hz) of the fan 100 X blade numbers (7) ⁇ the first noise component (200Hz region). That is, 28 Hz X 7 ⁇ 200Hz region.
  • This fan rotation noise becomes a problem when amplified at the time of being transmitted to the vehicle.
  • the airflow regulating plate 221 restricts the air from flowing along the wall surface of the larger-area part 220a of the air introducing part 220 into the ring portion 210. Therefore, the interference in the airflow can be reduced thereby the fan rotation noise in the first frequency range (the first noise component) can be reduced.
  • the length in the circumferential direction of the airflow regulating plate 221 is set as L
  • the inner diameter of the ring portion 210 is set as D
  • the curvature radius of the airflow regulating plate 221 is set as R .
  • the fan rotation noise in the first frequency range has been examined by varying R with respect to a ratio L / D .
  • a projecting length h of the airflow regulating plate is 7mm. A sufficient noise reduction effect is obtained when L / D is within the range of 0.34 and 0.44, as shown in Fig. 3 .
  • the curvature radius R of the airflow regulating plate 221 As to the curvature radius R of the airflow regulating plate 221, the closer the airflow regulating plate 221 is to the ring portion 210, the better effect in the reduction of the rotation noise is obtained.
  • R is set at 211mm, the maximum reduction in the noise, which is around 4.5 dB, is obtained. This effect is obtained even R up to 271mm.
  • this effect is considered in view of the ratio ( R / D ) of the curvature radius R to the inner diameter D of the ring portion 210, the sufficient effect can be obtained when R / D is within the range of 0.57 and 0.74.
  • the airflow regulating plate 221 is explained as the one integrally provided with the larger-area part 220a of the air introducing part 220.
  • the airflow regulating plate 221 also can be formed independently from the air introducing part 220, and can be integrated with the air introducing part 220.
  • the outline shape of the air introducing part 220 is not limited to rectangular, but can be modified to other shapes such as circular or elliptical shape.
  • the airflow regulating plate 221 can be formed by plural parts more than two.
  • the fan 100 is used for the electric blower 10 rotated by the motor 300.
  • an engine fan rotated by driving force of a vehicular engine can be also used.
  • the fan 100 for supplying air to the radiator 1.
  • the fan 100 can be a subject for use in other heat exchangers such as a condenser for condensing refrigerant of an air-conditioner, an oil cooler for cooling oil or an intercooler for cooling drawn air.

Landscapes

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

Claims (6)

  1. Haube, umfassend:
    einen Ringabschnitt (210) zum Umschließen eines radial äußeren Randes eines Axialströmungslüfters (100) zum Blasen von Luft, wobei der Lüfter (100) gegenüber einem Wärmetauscher (1) angeordnet ist, welcher stromaufwärts des Lüfters (100) in einer Luftströmung positioniert ist; und
    einen Lufteinleitteil (220) zum Einleiten von Luft in den Ringabschnitt (210), erweitert von dem Ringabschnitt (210) zu dem Stromaufwärtigen in der Luftströmung, wobei ein Zentrum des Ringabschnitts (210) bezüglich einem Zentrum des Lufteinleitteils (220) exzentrisch ist, wobei die Haube dadurch gekennzeichnet ist, dass:
    der Lufteinleitteil (220) einen großflächigen Teil (220a) und einen kleinflächigen Teil (220b) aufweist, welcher durch den exzentrisch angeordneten Ringabschnitt (210) bezüglich des Lufteinleitteils (220) ausgebildet ist; und
    eine Luftströmungs-Regulierungsplatte (221) auf dem großflächigen Bereich (220a) vorgesehen ist, um zu einer stromaufwärtigen Seite der Luftströmung herauszuragen, und mehrere abgeteilte Teile aufweist, welche alle eine Kreisbogenform aufweisen, welche mit dem Ringabschnitt (210) konzentrisch ist.
  2. Haube nach Anspruch 1, wobei:
    das Zentrum des Ringabschnitts (210) exzentrisch in einer Rechts-/Linksrichtung bezüglich des Zentrums des Lufteinleitteils (220) angeordnet ist, und
    die Luftströmungs-Regulierungsplatte (221) in zwei Teile in einer Vertikalrichtung senkrecht zu der Rechts-/Linksrichtung unterteilt ist
  3. Haube nach Anspruch 1 oder 2, wobei:
    wenn ein innerer Durchmesser des Ringabschnitts (210) als D gewählt ist und
    eine Länge in einer Umfangsrichtung der kreisbogenförmigen Luftströmungs-Regulierungsplatte (221) als L gewählt ist, 0,34 ≤ L/D ≤ 0,44 gilt.
  4. Haube nach irgendeinem der Ansprüche 1 bis 3, wobei:
    wenn ein innerer Durchmesser des Ringabschnitts (210) als D gewählt ist und
    ein Krümmungsradius der kreisbogenförmigen Luftströmungs-Regulierungsplatte (221) als R gewählt ist, 0,57 ≤ R/D ≤ 0,74 gilt.
  5. Haube nach irgendeinem der Ansprüche 1 bis 4, wobei:
    eine vorstehende Länge (h) der Luftströmungs-Regulierungsplatte (221) innerhalb eines Bereichs von 7 mm und 12 mm ist.
  6. Gebläse, umfassend:
    einen Axialströmungslüfter (100) zum Blasen von Luft, wobei der Lüfter (100) gegenüber einem Wärmetauscher (1) angeordnet ist, welcher stromaufwärts des Lüfters (100) in einer Luftströmung positioniert ist;
    eine Haube nach irgendeinem der Ansprüche 1 bis 5
EP05015433.5A 2004-08-02 2005-07-15 Haube und Lüfter mit dieser Haube Expired - Fee Related EP1624196B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004225830A JP4380454B2 (ja) 2004-08-02 2004-08-02 シュラウド

Publications (3)

Publication Number Publication Date
EP1624196A2 EP1624196A2 (de) 2006-02-08
EP1624196A3 EP1624196A3 (de) 2012-08-08
EP1624196B1 true EP1624196B1 (de) 2014-03-26

Family

ID=35266869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05015433.5A Expired - Fee Related EP1624196B1 (de) 2004-08-02 2005-07-15 Haube und Lüfter mit dieser Haube

Country Status (3)

Country Link
EP (1) EP1624196B1 (de)
JP (1) JP4380454B2 (de)
CN (1) CN100404813C (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090220334A1 (en) * 2008-02-28 2009-09-03 Spx Cooling Technologies, Inc. Fan shroud for heat exchange tower fans
JP2010169007A (ja) * 2009-01-23 2010-08-05 Calsonic Kansei Corp ファンシュラウド構造
JP5868294B2 (ja) * 2012-09-03 2016-02-24 シャープ株式会社 ヘアドライヤ
JP5965296B2 (ja) * 2012-11-22 2016-08-03 株式会社豊田自動織機 車両用冷却ファン装置
JP6126421B2 (ja) * 2013-03-21 2017-05-10 三菱重工オートモーティブサーマルシステムズ株式会社 モータファン
JP6156061B2 (ja) * 2013-10-29 2017-07-05 株式会社デンソー 送風装置
FR3023870B1 (fr) * 2014-07-15 2016-07-29 Peugeot Citroen Automobiles Sa Groupe moto-ventilateur incorporant une buse et un ecran thermique
JP6390348B2 (ja) * 2014-10-29 2018-09-19 株式会社デンソー 送風装置
CN104879319B (zh) * 2015-05-25 2017-01-18 广东美的环境电器制造有限公司 用于无叶风扇的基座及无叶风扇
US10808706B2 (en) * 2016-06-09 2020-10-20 Denso Corporation Blowing device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56162469U (de) * 1980-04-30 1981-12-03
JPH0755293Y2 (ja) * 1989-06-28 1995-12-20 アイシン化工株式会社 熱交換器用冷却装置
JP3741255B2 (ja) * 2000-03-10 2006-02-01 株式会社丸山製作所 遠心送風機及び携帯型作業機
JP4442029B2 (ja) * 2000-12-15 2010-03-31 パナソニック株式会社 送風装置
CN2526566Y (zh) * 2002-01-07 2002-12-18 九德松益股份有限公司 低噪音风机
JP4191431B2 (ja) * 2002-05-27 2008-12-03 三菱重工業株式会社 冷却ファン
KR100848569B1 (ko) * 2002-07-15 2008-07-25 한라공조주식회사 팬 쉬라우드

Also Published As

Publication number Publication date
EP1624196A2 (de) 2006-02-08
JP4380454B2 (ja) 2009-12-09
JP2006046113A (ja) 2006-02-16
EP1624196A3 (de) 2012-08-08
CN1734071A (zh) 2006-02-15
CN100404813C (zh) 2008-07-23

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