WO2010113391A1 - 遠心式送風機及び自動車用シート - Google Patents
遠心式送風機及び自動車用シート Download PDFInfo
- Publication number
- WO2010113391A1 WO2010113391A1 PCT/JP2010/001652 JP2010001652W WO2010113391A1 WO 2010113391 A1 WO2010113391 A1 WO 2010113391A1 JP 2010001652 W JP2010001652 W JP 2010001652W WO 2010113391 A1 WO2010113391 A1 WO 2010113391A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impeller
- centrifugal blower
- centrifugal
- rotation center
- casing
- Prior art date
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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
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
Definitions
- the present invention relates to a centrifugal blower having a flat centrifugal multiblade impeller having a ratio H / D of an impeller height H to an impeller diameter D of 0.2 or less.
- the present invention also relates to an automobile seat incorporating a centrifugal blower.
- the centrifugal blower is configured such that a centrifugal multiblade impeller (hereinafter abbreviated as “impeller”) is housed in a spiral scroll casing (hereinafter abbreviated as “casing”).
- the impeller blows out the sucked air radially outward along the rotation center axis.
- the casing converts the dynamic pressure into a static pressure while collecting the air blown out from the impeller, and blows out air from the blowout port provided on the winding end side.
- Patent Document 1 uses a low profile impeller in which the ratio H / D (aspect ratio) of the impeller height H in the rotation center axis direction to the impeller diameter D is 0.5 or less in such a centrifugal blower.
- the minimum distance (nose gap) between the nose portion (also referred to as a tongue portion) of the casing and the impeller is 0.08 times or more and 0.2 times or less the impeller diameter D.
- Patent Document 1 when a lower profile impeller having an aspect ratio H / D of 0.2 or less is used, there is a problem that the air blowing capacity per revolution of the impeller is remarkably reduced.
- the centrifugal blower of the present invention includes a centrifugal multi-blade impeller that has a plurality of blades around a rotation center axis and blows out the air sucked along the rotation center axis outward in the radial direction, and the centrifugal multi-blade A spiral scroll casing that houses the impeller.
- the ratio H / D of the height H of the centrifugal multiblade impeller in the direction of the rotation center axis to the diameter D of the centrifugal multiblade impeller is 0.2 or less, and the logarithmic spiral spread angle ⁇ of the scroll casing is 2 It is 0 degree or more.
- the automobile seat of the present invention incorporates the above centrifugal blower of the present invention.
- the logarithmic spiral spread angle ⁇ of the casing is appropriately set, in the centrifugal blower using the low-profile impeller having the ratio H / D of 0.2 or less, the movement generated by the impeller The pressure is efficiently converted into static pressure by the casing, and the air blowing performance (pressure-air volume characteristic) is improved.
- centrifugal blower of the present invention it is possible to improve the blowing capacity per rotation speed and reduce the blowing noise.
- FIG. 1 is a cross-sectional view of a centrifugal blower according to an embodiment of the present invention.
- FIG. 2A is a front view of a centrifugal multiblade impeller that constitutes the centrifugal blower shown in FIG. 1.
- FIG. 2B is a top view of the centrifugal multiblade impeller constituting the centrifugal blower shown in FIG. 1.
- FIG. 3 is a cross-sectional view of the scroll casing taken along line IV-IV in FIG.
- FIG. 4 is a diagram showing a dimensionless blowing performance characteristic diagram of two centrifugal blowers in which the logarithmic spiral spread angle ⁇ of the casing is 2.9 degrees and 1.0 degree.
- FIG. 1 is a cross-sectional view of a centrifugal blower according to an embodiment of the present invention.
- FIG. 2A is a front view of a centrifugal multiblade impeller that constitutes the centrifugal blower shown in FIG. 1.
- FIG. 5 is a diagram showing the relationship between the noise level and the frequency of the centrifugal blower with the logarithmic spiral spread angle ⁇ shown in FIG. 4 being 2.9 degrees.
- FIG. 6 is a diagram showing the relationship between the logarithmic spiral spread angle ⁇ and the air blowing performance.
- FIG. 7 is a cutaway perspective view showing an embodiment of a vehicle seat incorporating the centrifugal blower of the present invention.
- the centrifugal blower of the present invention includes an impeller having a plurality of blades and a spiral casing that houses the impeller.
- a drive source for example, a motor
- a drive source for rotating the impeller may be built in the casing or may be disposed outside the casing.
- the shape of the blade provided in the impeller is not particularly limited, and may be any one of a forward-facing blade in which the air outlet portion (outer end) of the blade is directed in the rotation direction and a backward-facing blade in the direction opposite to the rotation direction.
- the exit portion of the blade is a forward-facing blade facing in the rotation direction, and the exit angle ⁇ of the blade is 60 ° or more and 90 ° or less. This is because the energy for rotating the impeller can be efficiently converted into dynamic pressure.
- an annular shroud is provided on the outer periphery of the air intake side of the impeller.
- the rectification effect of the shroud can suppress the generation of vortices due to the air flow flowing outward in the radial direction of the impeller and the back flow to the impeller, and the blade passing frequency sound can be reduced.
- FIG. 1 is a cross-sectional view of a centrifugal blower 1 according to an embodiment of the present invention.
- 2A is a front view of an impeller (centrifugal multiblade impeller) 10, and
- FIG. 2B is a top view thereof.
- 3 is a cross-sectional view of the casing (scroll casing) 20 taken along the line IV-IV in FIG.
- the centrifugal blower 1 includes an impeller 10 and a casing 20 that houses the impeller 10.
- the impeller 10 is rotationally driven by the electric motor 30 in the direction of the rotation direction 10d around the rotation center axis 10a.
- the impeller 10 has a large number of blades (blades) 11 around the rotation center shaft 10a, and blows out the air sucked along the rotation center shaft 10a radially outward.
- a shroud 12 is provided on the side of the suction port 21 (see FIG. 1) of the impeller 10 so as to connect the outer peripheral side ends of the blades 11 in order.
- the shroud 12 has an annular shape that is concentric with the impeller 10.
- the casing 20 is a spiral scroll casing that collects air blown from the impeller 10 and converts the dynamic pressure into static pressure.
- An air inlet 21 is provided on one side of the blower 1 in the direction of the rotation center shaft 10a (the side opposite to the electric motor 30), and an outlet 22 for blowing out air is provided on the winding end side.
- the diameter of the impeller 10 (that is, the diameter of an imaginary circle passing through the outer end of the blade 11) is D, and the height of the impeller 10 in the direction of the rotation center axis 10a (that is, at the outlet portion).
- the impeller 10 is a low-profile impeller having a ratio H / D (aspect ratio) of the height H to the diameter D of 0.2 or less.
- the ratio D1 / D is preferably 0.7 or less.
- the ratio D1 / D is larger than this, the air blowing performance is lowered.
- the exit portion of the blade 11 of the impeller 10 is preferably oriented in the same direction as the rotation direction 10d of the impeller 10, and the exit angle ⁇ of the blade 11 is particularly preferably 60 ° or more and 90 ° or less.
- the outlet angle ⁇ is a tangent along the blade 11 at the outer end of the blade 11 when the impeller 10 is viewed from the suction port 21 (see FIG. 1) side.
- the exit angle ⁇ is measured from the forward side of the impeller 10 in the rotational direction 10d.
- the logarithmic spiral spread angle ⁇ represented by the following formula is 2.0 degrees or more.
- r r 0 ⁇ exp ( ⁇ ⁇ tan ( ⁇ )) here, r: distance from the rotation center shaft 10a to the outer inner wall surface of the casing 20 r 0 : the rotation center shaft 10a to the casing 20 along the reference line L 0 connecting the center of curvature Pn of the nose portion 23 and the rotation center shaft 10a the distance to the outer inner wall theta: the angle measured in the direction of rotation 10d of the reference line L 0 from the impeller 10 connecting the center of curvature Pn of the nose portion 23 the rotational center axis 10a.
- FIG. 4 is a diagram showing the blowing performance of two centrifugal blowers having a logarithmic spiral spread angle ⁇ of the casing 20 of 2.9 degrees (“Example”) and 1.0 degree (“Comparative Example”).
- the two centrifugal fans have the same specifications except that the logarithmic spiral spread angle ⁇ is different.
- the aspect ratio H / D of the impeller 10 was set to 0.12.
- the maximum outer diameter W (see FIG. 3) of the logarithmic spiral portion of the casing 20 (the portion having the outer inner wall surface changing in a logarithmic spiral) in the direction orthogonal to the rotation center axis 10a was 95 mm.
- the horizontal axis is the air volume ⁇
- the vertical axis is the static pressure ⁇
- both the horizontal axis and the vertical axis are dimensionless.
- the distance between the nose portion 23 of the casing 20 and the impeller 10 is narrower in the embodiment.
- noise generated by the air blown radially outward from the impeller against the nose part (blade passing frequency sound, hereinafter referred to as “NZ noise”). )
- NZ noise blade passing frequency sound
- FIG. 5 is a diagram showing the results of measuring the noise during operation of the centrifugal blower according to the embodiment shown in FIG.
- the horizontal axis represents frequency
- the vertical axis represents sound pressure.
- a peak at a specific frequency is not recognized, and no harmful NZ noise is generated.
- the range (especially the lower limit value) of the logarithmic spiral spread angle ⁇ of the casing 20 is set appropriately, so that the low-profile impeller with a small aspect ratio H / D.
- the dynamic pressure generated by the impeller 10 is converted into a static pressure by the casing 20, and the blowing performance (pressure-air volume characteristic) is improved.
- the air blowing performance is improved, harmful NZ noise is hardly generated.
- the blowing performance is improved by increasing the rotation speed of the impeller. Since the centrifugal blower of the present invention has an excellent blowing performance, an equivalent static pressure can be obtained at a lower rotational speed of the impeller than a conventional centrifugal blower. Therefore, according to the centrifugal blower of the present invention, the rotation speed of the impeller can be lowered, and as a result, noise reduction can be realized.
- FIG. 6 is a diagram showing a change in air blowing performance when the logarithmic spiral spread angle ⁇ is changed.
- the horizontal axis represents the logarithmic spiral spread angle ⁇ , and the specifications of the other centrifugal fans are the same.
- the vertical axis represents the static pressure of the centrifugal blower. It can be seen that higher static pressure is obtained as the logarithmic spiral spread angle ⁇ increases. In particular, in the range where the logarithmic spiral spread angle ⁇ is 2.0 degrees or more, the slope of the curve is large, and it can be seen that increasing the logarithmic spiral spread angle ⁇ is effective in improving the static pressure. Therefore, in the present invention, the logarithmic spiral spread angle ⁇ is set to 2.0 degrees or more.
- the static pressure required for the centrifugal blower is 120 Pa or more, preferably 190 Pa or more. Therefore, from FIG. 6, the logarithmic spiral spread angle ⁇ is preferably 2.5 degrees or more.
- the upper limit value of the logarithmic spiral spread angle ⁇ is not particularly limited. However, when the logarithmic spiral spread angle ⁇ is increased, the nose gap is reduced as described above, and NZ noise may become remarkable. Therefore, in general, the logarithmic spiral spread angle ⁇ is preferably 4.0 degrees or less.
- FIG. 7 is a cutaway perspective view showing an embodiment of an automotive seat 100 incorporating the centrifugal blower 1 of the present invention.
- Centrifugal blower 1 is built in seating portion 101 of seat 100. Air generated by an air conditioner (not shown) arranged outside the seat 100 and having an appropriately adjusted temperature and humidity is introduced into the suction port of the centrifugal blower 1 through a duct (not shown). The air blown out from the outlet of the centrifugal blower 1 is blown from the seat portion 101 and the seat back 102 toward the occupant.
- the centrifugal blower 1 is built only in the seating portion 101, but may be built in the seat back 102.
- the centrifugal blower 1 of the present invention includes the low-profile impeller 10 having an aspect ratio H / D of 0.2 or less, the thickness of the centrifugal blower 1 is thin. Therefore, the increase in the thickness of the seat portion 101 and the seat back 102 due to the incorporation of the centrifugal blower 1 is negligible. Therefore, it is possible to avoid a narrow interior space. Moreover, since the centrifugal blower 1 of the present invention has low noise, even if the centrifugal blower 1 is built in the seat 100, the passenger hardly feels unpleasant noise.
- the maximum outer diameter W (see FIG. 3) of the casing 20 described above is 100 mm or less from the viewpoint of effectively using the space. Is desirable.
- the automobile seat is only one of the application fields of the centrifugal blower of the present invention, and the centrifugal blower of the present invention can of course be used for other purposes.
- the centrifugal blower of the present invention can be particularly preferably used as a blower installed in a limited space (for example, a passenger compartment) because it is a small and low profile type and has high blowing ability and low noise.
Abstract
Description
ここで、
r:回転中心軸10aからケーシング20の外側内壁面までの距離
r0:ノーズ部23の曲率中心Pnと回転中心軸10aとを結ぶ基準線L0に沿った、回転中心軸10aからケーシング20の外側内壁面までの距離
θ:ノーズ部23の曲率中心Pnと回転中心軸10aとを結ぶ基準線L0からインペラ10の回転方向10dに測った角度
である。
10 インペラ(遠心式多翼インペラ)
10a インペラの回転中心軸
10d インペラの回転方向
11 ブレード(翼)
12 シュラウド
20 ケーシング(スクロールケーシング)
21 吸入口
22 吹出口
23 ノーズ部
30 電動モータ
100 自動車用シート
101 着座部
102 シートバック
Claims (5)
- 回転中心軸の周りに複数枚のブレードを有し前記回転中心軸に沿って吸入した空気を半径方向外向きに吹き出す遠心式多翼インペラと、前記遠心式多翼インペラを収納する渦巻状のスクロールケーシングとを備える遠心式送風機であって、
前記遠心式多翼インペラの直径Dに対する前記回転中心軸方向における前記遠心式多翼インペラの高さHの比H/Dが0.2以下であり、
前記スクロールケーシングの対数螺旋拡がり角度γが2.0度以上であることを特徴とする遠心式送風機。 - 前記スクロールケーシングの対数螺旋拡がり角度γが2.5度以上である請求項1に記載の遠心式送風機。
- 前記遠心式多翼インペラの前記ブレードの出口角βは60°以上90°以下である請求項1又は2に記載の遠心式送風機。
- 前記遠心式多翼インペラの空気吸入側の外周に円環状のシュラウドが設けられている請求項1~3のいずれかに記載の遠心式送風機。
- 請求項1~4のいずれかに記載の遠心式送風機を内蔵した自動車用シート。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010800018518A CN102066772A (zh) | 2009-04-03 | 2010-03-09 | 离心式送风机和汽车用座椅 |
US12/988,742 US20110031786A1 (en) | 2009-04-03 | 2010-03-09 | Centrifugal air blower and automobile seat |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009091289A JP2010242601A (ja) | 2009-04-03 | 2009-04-03 | 遠心式送風機及び自動車用シート |
JP2009-091289 | 2009-04-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010113391A1 true WO2010113391A1 (ja) | 2010-10-07 |
Family
ID=42827710
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/001652 WO2010113391A1 (ja) | 2009-04-03 | 2010-03-09 | 遠心式送風機及び自動車用シート |
Country Status (4)
Country | Link |
---|---|
US (1) | US20110031786A1 (ja) |
JP (1) | JP2010242601A (ja) |
CN (1) | CN102066772A (ja) |
WO (1) | WO2010113391A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014032909A (ja) * | 2012-08-06 | 2014-02-20 | Jsr Corp | 蓄電デバイスの負極用バインダー組成物 |
WO2021009843A1 (ja) * | 2019-07-16 | 2021-01-21 | 三菱重工エンジン&ターボチャージャ株式会社 | 遠心圧縮機のスクロール構造及び遠心圧縮機 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6102134B2 (ja) * | 2012-09-18 | 2017-03-29 | 株式会社デンソー | 車両用シート空調装置 |
US9649960B2 (en) | 2012-12-14 | 2017-05-16 | Panasonic Intellectual Property Management Co., Ltd. | In-vehicle heating device |
CN103042960B (zh) * | 2012-12-24 | 2016-01-27 | 廊坊市金色时光科技发展有限公司 | 一种座椅通风装置的布置结构 |
JP6311377B2 (ja) * | 2014-03-17 | 2018-04-18 | 株式会社デンソー | シート空調システム |
CN107076169B (zh) * | 2014-10-24 | 2019-01-08 | 株式会社Sft研究所 | 送风装置 |
CN107599913A (zh) * | 2017-09-22 | 2018-01-19 | 比赫电气(太仓)有限公司 | 一种用于汽车座椅的半导体控温模组 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06117397A (ja) * | 1992-09-30 | 1994-04-26 | Nippondenso Co Ltd | 多翼送風機 |
JP2002371997A (ja) * | 2001-06-13 | 2002-12-26 | Denso Corp | 遠心式送風機 |
JP2004270577A (ja) * | 2003-03-10 | 2004-09-30 | Denso Corp | 遠心送風機 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6087975A (en) * | 1997-06-25 | 2000-07-11 | Honda Giken Kogyo Kabushiki Kaisha | Object detecting system for vehicle |
US6719534B2 (en) * | 2001-04-11 | 2004-04-13 | Denso Corporation | Vehicle seat blower unit with a motor mounted within a scroll housing and a cooling motor attachment bracket |
-
2009
- 2009-04-03 JP JP2009091289A patent/JP2010242601A/ja not_active Withdrawn
-
2010
- 2010-03-09 WO PCT/JP2010/001652 patent/WO2010113391A1/ja active Application Filing
- 2010-03-09 CN CN2010800018518A patent/CN102066772A/zh not_active Withdrawn
- 2010-03-09 US US12/988,742 patent/US20110031786A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06117397A (ja) * | 1992-09-30 | 1994-04-26 | Nippondenso Co Ltd | 多翼送風機 |
JP2002371997A (ja) * | 2001-06-13 | 2002-12-26 | Denso Corp | 遠心式送風機 |
JP2004270577A (ja) * | 2003-03-10 | 2004-09-30 | Denso Corp | 遠心送風機 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014032909A (ja) * | 2012-08-06 | 2014-02-20 | Jsr Corp | 蓄電デバイスの負極用バインダー組成物 |
WO2021009843A1 (ja) * | 2019-07-16 | 2021-01-21 | 三菱重工エンジン&ターボチャージャ株式会社 | 遠心圧縮機のスクロール構造及び遠心圧縮機 |
JPWO2021009843A1 (ja) * | 2019-07-16 | 2021-01-21 | ||
JP7232332B2 (ja) | 2019-07-16 | 2023-03-02 | 三菱重工エンジン&ターボチャージャ株式会社 | 遠心圧縮機のスクロール構造及び遠心圧縮機 |
Also Published As
Publication number | Publication date |
---|---|
US20110031786A1 (en) | 2011-02-10 |
CN102066772A (zh) | 2011-05-18 |
JP2010242601A (ja) | 2010-10-28 |
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