JP5899394B2 - Centrifugal blower - Google Patents
Centrifugal blower Download PDFInfo
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- JP5899394B2 JP5899394B2 JP2011160573A JP2011160573A JP5899394B2 JP 5899394 B2 JP5899394 B2 JP 5899394B2 JP 2011160573 A JP2011160573 A JP 2011160573A JP 2011160573 A JP2011160573 A JP 2011160573A JP 5899394 B2 JP5899394 B2 JP 5899394B2
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Description
本発明は、車両に搭載され、吸込口にフィルタを配置した遠心送風機に関する。 The present invention relates to a centrifugal blower mounted on a vehicle and provided with a filter at a suction port.
従来、遠心送風機では、ユニットケース内に吸入される空気を濾過するためにユニットケースとは別部品のフィルタ部を形成しそれを固定する構成が提案されている。 2. Description of the Related Art Conventionally, a centrifugal blower has been proposed in which a filter part, which is a separate part from the unit case, is formed in order to filter the air sucked into the unit case and is fixed thereto.
この構成には様々な提案がなされており、ファンモータの吸込口の近傍にフィルタ部を配置した従来例を図5に示す。この図5に示すように、従来の技術では、ユニットケースとは別体に設けられたフィルタ部をユニットケースに設けられたフックに回し止める構成を採用していた(特許文献なし)。 Various proposals have been made for this configuration, and FIG. 5 shows a conventional example in which a filter portion is disposed in the vicinity of the suction port of the fan motor. As shown in FIG. 5, the conventional technique employs a configuration in which a filter portion provided separately from the unit case is locked to a hook provided in the unit case (no patent document).
また、吸込口とフィルタの間に対角線上に伸びる支持部材を配置する構造(例えば、特許文献1参照)などがある。 Further, there is a structure in which a support member extending diagonally between the suction port and the filter is disposed (for example, see Patent Document 1).
図6に上記特許文献1に開示された吸込口に支持部材が設けられた車両空調用送風ユニットの一例を示す。図6において、フィルタを支える略十字を呈した4枚の平板部材のうちの一枚の平板部材を、スクロール壁において遠心ファンに最も接近するノーズ位置αから、スクロール壁内で空気が流れる方向へ40°の範囲に設置することで、支持部材が無い状態以上に吸入圧損を小さくでき、風量低下、騒音悪化を解消できる。 FIG. 6 shows an example of a vehicle air conditioning blower unit in which a support member is provided at the suction port disclosed in Patent Document 1. In FIG. 6, one flat plate member out of four flat plate members having a substantially cross shape that supports the filter is moved from a nose position α closest to the centrifugal fan in the scroll wall to the direction in which air flows in the scroll wall. By installing in the range of 40 °, the suction pressure loss can be reduced more than the state where there is no support member, and the air volume reduction and noise deterioration can be eliminated.
近年、電装分野に用いられ、車内の電動化が進むにつれその需要が大きくなってきた車両用空調ファンモータは、ウエイトダウンのための小型化、薄型化およびコストダウンの要求が強い。そこで、図5および図6に示すように、従来用いていたフィルタ部または、平板部材を廃止し、ユニットケースにフィルタを一体に成型することでウエイトダウンとコストダウンを図ったものがある。 2. Description of the Related Art In recent years, vehicle air conditioning fan motors that have been used in the field of electrical equipment and have become increasingly demanding as the interior of a vehicle is electrified, have a strong demand for size reduction, thickness reduction, and cost reduction for weight down. Therefore, as shown in FIG. 5 and FIG. 6, there has been a case where the conventionally used filter portion or flat plate member is eliminated and the filter is integrally formed in a unit case to reduce weight and cost.
図7に、従来のユニットケースに支持バーが一体に成型された一例を示す。 FIG. 7 shows an example in which a support bar is formed integrally with a conventional unit case.
図7に示すように、ユニットケースの成型状態を加味し、吸込口中央からフィルタを支持するユニットケースの支持バーを真っ直ぐに配置した場合、ファンと支持バーの間に乱流が発生し、それが空気の流れの抵抗となって圧力変動を引き起こし、耳障りとなる高いピークのファンの風切り騒音を招くという課題がある。 As shown in FIG. 7, when the unit case support bar is placed straight from the center of the suction port, taking into account the molded state of the unit case, turbulence is generated between the fan and the support bar. However, there is a problem that the wind flow noise of a high-peak fan that causes a fluctuation in pressure due to the resistance of the air flow and becomes annoying is caused.
本発明は、このような従来の課題を解決するものであり、支持バーを整流部材として利用して、ファンと支持バーの間に発生する乱流を解消することで静音効果を有する機構を設けた遠心送風機を実現することを目的とする。 The present invention solves such a conventional problem, and a mechanism having a silent effect is provided by eliminating the turbulent flow generated between the fan and the support bar by using the support bar as a rectifying member. The purpose is to realize a centrifugal blower .
上記課題を解決するために本発明は、ユニットケースには吸込口中央からフィルタを支持する支持バーが形状され、前記吸込口の空気吸込方向から見た形状は吸込口中央に向かう方向に対し3分割を呈するように配置されたものであり、3分割を呈した前記支持バーは、前記ユニットケース内において空気が流れる方向へ25°±5°屈折させた構成からなる遠心送風機である。 In order to solve the above-mentioned problems, the present invention has a unit case in which a support bar that supports a filter is formed from the center of the suction port, and the shape of the suction port viewed from the air suction direction is 3 in the direction toward the center of the suction port. The support bar, which is arranged so as to be divided, is a centrifugal blower having a configuration in which the support bar is refracted by 25 ° ± 5 ° in the air flow direction in the unit case.
本発明によれば、支持バーを整流部材として利用して、ファンと支持バーの間に発生する乱流を解消することにより、耳障りとなる高いピークのファンの風切り騒音を抑制する静音効果を得ることができる。 According to the present invention, by using the support bar as a rectifying member, by eliminating the turbulent flow generated between the fan and the support bar, it is possible to obtain a silent effect for suppressing wind noise of a high-peak fan that is annoying. be able to.
以下、本発明に係る遠心送風機の好適な実施の形態について添付の図面を参照しながら説明する。
(実施の形態1)
図1A、図1Bは本発明の実施の形態1に掛る遠心送風機の斜視図および構造図である。
DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a centrifugal blower according to the present invention will be described with reference to the accompanying drawings.
(Embodiment 1)
1A and 1B are a perspective view and a structural diagram of a centrifugal blower according to Embodiment 1 of the present invention.
図1Bにおいて遠心送風機は、内部に空気通路を形成するユニットケース1と、前記ユニットケース1の吸込口2に配置され、前記吸込口2に吸入される空気を濾過するフィルタ3と、回転に伴って前記空気通路内に空気流を発生するファン4と、前記ファン4を回転駆動するモータ部5とにより構成される。 In FIG. 1B, the centrifugal blower includes a unit case 1 that forms an air passage therein, a filter 3 that is disposed in the suction port 2 of the unit case 1 and that filters air sucked into the suction port 2, and rotates. The fan 4 that generates an air flow in the air passage and the motor unit 5 that rotationally drives the fan 4 are configured.
前記ユニットケース1には前記吸込口2の中央から前記フィルタ3を支持する支持バー6が形状され、前記吸込口2の空気吸込方向から見た形状は吹出口7の中央に向かう方向に対し3分割を呈するように配置されたものであり、3分割を呈した前記支持バー6は、幅2mm以下に形状され、前記ユニットケース1内において空気が流れる方向へ25°±5°の範囲で屈折させた形状となっている。 The unit case 1 is formed with a support bar 6 that supports the filter 3 from the center of the suction port 2, and the shape of the suction port 2 viewed from the air suction direction is 3 with respect to the direction toward the center of the air outlet 7. The support bar 6, which is arranged so as to be divided, is formed to have a width of 2 mm or less and is refracted in a range of 25 ° ± 5 ° in the direction in which air flows in the unit case 1. The shape is
この遠心送風機は、ファン4が回転駆動されることによって、外気が吸込口2からファン4の内側に吸引され、ファン4の外側へファン4の回転とともに圧送される。ファン4の外側へ圧送された空気は、ユニットケース1の内部の壁に沿って吹出口7に導かれ、その吹出口7から車両用空調ユニット内に吹き出される。 In the centrifugal blower , when the fan 4 is driven to rotate, outside air is sucked into the fan 4 from the suction port 2 and is pumped to the outside of the fan 4 along with the rotation of the fan 4. The air pressure-fed outside the fan 4 is guided to the air outlet 7 along the inner wall of the unit case 1 and blown out from the air outlet 7 into the air conditioning unit for the vehicle.
フィルタ3は、複数の細い糸を編みこんで形状され、図1Bのユニットケース1上に示すようにユニットケース1上の吸込口2の全域に配置されるものであり、フィルタ3の落下または、ファン4との接触を防ぐためにフィルタ3を支持する支持バー6とともにユニットケース1上を構成する樹脂部材によって一体に成型されたものである。 The filter 3 is formed by knitting a plurality of thin threads, and is disposed over the entire area of the suction port 2 on the unit case 1 as shown on the unit case 1 in FIG. 1B. In order to prevent contact with the fan 4, it is integrally molded by a resin member constituting the unit case 1 together with a support bar 6 that supports the filter 3.
また、吸込口2の開口範囲内は、支持バー6が空気の抵抗板として吸込圧損を生じさせない且つ、フィルタ3を保持するのに必要な強度を保つ板幅として2〜3mmを残して切り欠く形状に設けられている。 Further, within the opening range of the suction port 2, the support bar 6 is cut out leaving 2 to 3 mm as a plate width that does not cause suction pressure loss as an air resistance plate and maintains the strength necessary for holding the filter 3. It is provided in the shape.
本実施例では、支持バー6は、吸込口の空気吸込方向から見た形状が吹出口中央に向かう方向に対し3分割を呈するように配置されたものであり、3分割を呈した支持バー6は、ユニットケース1内において空気が流れる方向へ25°±5°屈折させたことを特徴としている。 In this embodiment, the support bar 6 is arranged so that the shape of the suction port viewed from the air suction direction is divided into three parts in the direction toward the center of the outlet, and the support bar 6 presenting the three parts is provided. Is characterized by being refracted by 25 ° ± 5 ° in the direction of air flow in the unit case 1.
図2は本発明の実施の形態1に掛る遠心送風機の支持バーの取付角度と騒音との関係を示すグラフである。また、図3は本発明の実施の形態1に掛る騒音ピークの発生要因を示す図である。 FIG. 2 is a graph showing the relationship between the mounting angle of the support bar of the centrifugal blower according to Embodiment 1 of the present invention and noise. FIG. 3 is a diagram showing the noise peak generation factors according to the first embodiment of the present invention.
この図2に示されるように、支持バー6を真っ直ぐに配置した場合に対し、ユニットケース1内において空気が流れる方向へ25°±5°屈折させ配置した場合では、明らかに騒音ピークの発生の違いが見られる。騒音の発生の要因として図3に示されるように、支持バー6がファン4の曲面に対し整流板として作用するために、空気の乱流を防ぐことできる。その結果、支持バーが真っ直ぐに配置した場合よりも吸込口2に吸い込まれる空気の流れが大きく改善されて送風性能が向上したためである。 As shown in FIG. 2, when the support bar 6 is arranged straight, when it is refracted by 25 ° ± 5 ° in the direction of air flow in the unit case 1, the noise peak is clearly generated. There is a difference. As shown in FIG. 3 as a cause of noise generation, the support bar 6 acts as a current plate on the curved surface of the fan 4, so that air turbulence can be prevented. As a result, the flow of air sucked into the suction port 2 is greatly improved as compared with the case where the support bar is arranged straight, and the blowing performance is improved.
上述したように、本実施例の遠心送風機は、フィルタ部の廃止によるウエイトダウンおよびコストダウンを図ることができるとともに、支持バー6を真っ直ぐに配した状態よりも空気の流れを改善することにより、耳障りとなる高いピークのファンの風切り騒音を解消できる。 As described above, the centrifugal blower of the present embodiment can reduce the weight and cost by eliminating the filter unit, and improve the air flow more than the state in which the support bar 6 is arranged straight. Can eliminate wind noise from high-peak fans that are annoying.
図4は本発明の実施の形態1に掛る遠心送風機の支持バーの長さを変形させた上視図である。 FIG. 4 is a top view in which the length of the support bar of the centrifugal blower according to the first embodiment of the present invention is deformed.
この図4に示されるように、支持バー6の吸込口2の中央から屈折させるまでの長さをaとし、屈折させた箇所からユニットケース1に繋がるまでの長さをbとした時、aおよびbの長さを任意の長さに変形させたとしても上記と同様の効果を得ることは言うまでもない。 As shown in FIG. 4, when the length from the center of the suction port 2 of the support bar 6 to be refracted is a, and the length from the refracted portion to the unit case 1 is b, It goes without saying that the same effect as described above can be obtained even if the lengths b and b are changed to arbitrary lengths.
シート空調ファンモータ等、小型化、薄型化に加え、低騒音、低コスト化が要求される車両用送風装置等に用いられるファンモータに有用である。 It is useful for fan motors used in vehicle air blowers and the like that require low noise and low cost in addition to miniaturization and thinning, such as seat air conditioning fan motors.
1 ユニットケース
2 吸込口
3 フィルタ
4 ファン
5 モータ部
6 支持バー
7 吹出口
1 Unit case 2 Suction port 3 Filter 4 Fan 5 Motor part 6 Support bar 7 Air outlet
Claims (3)
前記ユニットケースには前記吸込口中央から前記略円形の前記吸込口の外周部へとつながり前記フィルタを支持する支持バーが形状され、前記吸込口の空気吸込方向から見た形状は吸込口中央に向かう方向に対し複数の分割を呈するように配置されたものであり、前記複数の分割を呈した前記支持バーは、前記ユニットケース内の空気が流れる方向へ前記支持バーの途中の位置においてこの支持バーがなす2つの直線が角をなすように屈折させることで、前記支持バーと前記外周部とが前記空気が流れる方向へ傾いた状態でつながっていることを特徴とする遠心送風機。 A unit case that forms an air passage therein, a filter that is disposed in a substantially circular suction port formed in the unit case and that filters air sucked into the suction port, a plurality of blade portions, and the plurality of blades parts formed by a hub portion disposed in the outer periphery of a fan for generating an air flow in said air passage with the rotation, the centrifugal blower and a motor portion for rotating the fan,
The unit case is formed with a support bar that connects from the suction port center to the outer periphery of the substantially circular suction port and supports the filter, and the shape of the suction port viewed from the air suction direction is at the suction port center. directed has been arranged so as to exhibit a plurality of divided relative direction, the plurality of dividing the support bars exhibited, this support at the position of the middle of the support bar in the direction of the air flow in said unit case in Rukoto refracts as two straight bars formed by angled, centrifugal blower, characterized in that the supporting bar and the outer peripheral portion are connected in a state in which the air is inclined in the direction of flow.
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JP2011160573A JP5899394B2 (en) | 2011-07-22 | 2011-07-22 | Centrifugal blower |
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JP5899394B2 true JP5899394B2 (en) | 2016-04-06 |
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CN113404715B (en) * | 2021-08-17 | 2021-10-29 | 南通市吉腾鼓风机有限公司 | Air blower for air conditioning |
CN114741775B (en) * | 2022-06-13 | 2022-09-13 | 山东科技大学 | Method for calculating horizontal limit bearing capacity of composite loaded suction type foundation |
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JPS5429862U (en) * | 1977-07-29 | 1979-02-27 | ||
JPS60130114U (en) * | 1984-02-13 | 1985-08-31 | カルソニックカンセイ株式会社 | fan device |
JPH0226800U (en) * | 1988-08-05 | 1990-02-21 | ||
JP3334225B2 (en) * | 1993-03-29 | 2002-10-15 | 株式会社デンソー | Blower |
JP3794098B2 (en) * | 1997-01-31 | 2006-07-05 | 株式会社デンソー | Centrifugal blower |
JP4178992B2 (en) * | 2003-02-20 | 2008-11-12 | 株式会社デンソー | Ventilation unit for vehicle air conditioning |
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