JP6019391B2 - Centrifugal blower and clothes dryer having the same - Google Patents
Centrifugal blower and clothes dryer having the same Download PDFInfo
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Description
本発明は、本発明は、電気機器等に用いられる遠心送風機に関する。 The present invention relates to a centrifugal blower used for electrical equipment and the like.
近年、家電製品への省エネ化・低騒音化の要望が高まっている。洗濯乾燥機の省エネ化としてはヒータ式からヒートポンプ式の製品が増加してきている。洗濯乾燥機内にヒートポンプユニットが設置されることに加えて製品の小型化を実現するために送風機の小型、薄型化が求められている。また、洗濯乾燥機の小型化による送風ダクトの風路抵抗の増加、乾燥性能の向上などにより高効率送風機の要望も高まっている。（例えば、特許文献１参照）。 In recent years, there has been an increasing demand for energy saving and noise reduction for home appliances. In order to save energy in washing and drying machines, products from heater type to heat pump type are increasing. In addition to installing a heat pump unit in the washing and drying machine, it is required to reduce the size and thickness of the blower in order to reduce the size of the product. In addition, there is an increasing demand for a high-efficiency blower due to an increase in air duct resistance of the blower duct due to downsizing of the washing dryer and an improvement in drying performance. (For example, refer to Patent Document 1).
しかしながら、送風機を小型化・薄型化することにより発生する流体エネルギーの減少、損失の増加などが生じ、遠心送風機の出力が低下する。また、ファンの回転数を高くして出力を向上させる手段を採用すると、騒音が増加するという課題があった。 However, reducing the size and thickness of the blower causes a decrease in fluid energy and an increase in loss, resulting in a decrease in the output of the centrifugal blower. Further, when a means for improving the output by increasing the rotational speed of the fan is employed, there is a problem that noise increases.
特に、薄型化するために遠心送風機の中央部を窪ませて、そこに回転電機を配置した構成においては、ケーシングの主板とケーシングの底面との接続部位で生じる循環流れ損失を低減することも課題となり、送風機の効率の向上が希求された。 In particular, in the configuration in which the central portion of the centrifugal blower is recessed to reduce the thickness and the rotating electric machine is disposed there, it is also a problem to reduce the circulation flow loss that occurs at the connection portion between the main plate of the casing and the bottom surface of the casing. Therefore, improvement in the efficiency of the blower was desired.
第１の発明は、回転電機と、この回転電機の出力軸に装着される多翼ファンと、この多翼ファンを収容しかつ前記多翼ファンが前記出力軸によって回転駆動されて前記出力軸の軸方向から吸気される空気の入り口である吸気口を備える共に前記多翼ファンの外径側から出力される出力風の通路を成す渦巻き状の導風路と吸気された空気が吐き出される吹き出し口とを備えかつ前記吹き出し口の内側近傍に突出する主舌部及び前記導風路の基点の近傍に配置される副舌部を有するケーシングとからなる遠心送風機であり、前記ケーシングにおける前記多翼ファンの収容部の底部中央部は前記吸気口側へ突出する突出底を有し
、さらに前記導風路は前記基点から前記吹き出し口へと渦巻き状の形態を成す構成を有し、さらに前記主舌部の周囲端部は前記ケーシングの内壁面に接する構成を有して、前記ケーシングの吹き出し口の多翼ファン側の吸気口の天面側を頂部として前記ケーシングの底部の、吹き出し口の開口端部側及び前記導風路の奥側の両側に向かって徐々に張り出す傾斜面を有し、そしてさらに前記副舌部の周囲端部は前記ケーシングの内壁面に接する構成を有して、前記ケーシングの底部の、前記導風路の奥側に向かって徐々に張り出す傾斜面を有し、少なくとも前記主舌部の傾斜面の一辺と前記副舌部の傾斜面の一辺の一部とが稜線部を成して接する構成を具備する遠心送風機である。
According to a first aspect of the present invention, there is provided a rotating electrical machine, a multiblade fan mounted on the output shaft of the rotating electrical machine, the multiblade fan accommodated and the multiblade fan being rotated by the output shaft, A spiral air guide path that forms an output air path that is output from the outer diameter side of the multi-blade fan, and an air outlet that discharges the air that has been sucked in, including an air inlet that is an inlet of air that is sucked in from the axial direction And a multi-blade fan in the casing having a main tongue protruding in the vicinity of the inside of the air outlet and a casing having a sub tongue disposed in the vicinity of a base point of the air guide path. the bottom central portion of the housing portion of has a projecting bottom which projects into the intake port side, further wherein the air guide passage has a structure that forms a vortex winding form of into the balloon neck from the base point, further the main The peripheral edge of the tongue The casing has a configuration in contact with the inner wall surface of the casing, and the top surface side of the air inlet of the multi-blade fan side of the outlet of the casing is the top, and the opening end side of the outlet of the casing and the wind guide A sloped surface gradually projecting toward both sides on the back side of the road, and a peripheral end of the auxiliary tongue portion is in contact with an inner wall surface of the casing, It has an inclined surface that gradually protrudes toward the back side of the air guide passage, and at least one side of the inclined surface of the main tongue portion and a part of one side of the inclined surface of the auxiliary tongue portion form a ridge line portion. It is a centrifugal blower provided with the structure which touches.
第２の発明は、回転電機と、この回転電機の出力軸に装着される多翼ファンと、この多翼ファンを収容しかつ前記多翼ファンが前記出力軸によって回転駆動されて前記出力軸の軸方向から吸気される空気の入り口である吸気口を備える共に前記多翼ファンの外径側から出力される出力風の通路を成す渦巻き状の導風路と吸気された空気が吐き出される吹き出し口とを備えかつ前記吹き出し口の内側近傍に突出する主舌部及び前記導風路の基点の近傍に配置される副舌部を有するケーシングとからなる遠心送風機であり、前記ケーシングにおける前記多翼ファンの収容部の底部中央部は前記吸気口側へ突出する突出底を有し、さらに前記導風路は前記基点から前記吹き出し口へと渦巻き状の形態を成す構成を有し、さらに前記主舌部の周囲端部は前記ケーシングの内壁面に接する構成を有して、前記ケーシングの吹き出し口の多翼ファン側の吸気口の天面側を頂部として前記ケーシングの底部の、吹き出し口の開口端部側及び前記導風路の奥側の両側に向かって徐々に張り出す傾斜面を有し、そしてさらに前記副舌部の周囲端部は前記ケーシングの内壁面に接する構成を有して、前記ケーシングの底部の、吹き出し口の前記導風路の奥側に向かって徐々に張り出す傾斜面を有し、少なくとも前記主舌部の傾斜面の一辺と前記副舌部の傾斜面の一辺の一部とが稜線部を成して接する構成を具備し、かつ前記副舌部の傾斜面と前記導風路の始点とが接する箇所は前記ケーシングの略径方向に稜線部を成す構成を具備する遠心送風機である。 According to a second aspect of the present invention, there is provided a rotating electrical machine, a multiblade fan mounted on the output shaft of the rotating electrical machine, the multiblade fan accommodated and the multiblade fan being rotationally driven by the output shaft, A spiral air guide path that forms an output air path that is output from the outer diameter side of the multi-blade fan, and an air outlet that discharges the air that has been sucked in, including an air inlet that is an inlet of air that is sucked in from the axial direction And a multi-blade fan in the casing having a main tongue protruding in the vicinity of the inside of the air outlet and a casing having a sub tongue disposed in the vicinity of a base point of the air guide path. the bottom central portion of the housing portion of has a projecting bottom which projects into the intake port side, further wherein the air guide passage has a structure that forms a vortex winding form of into the balloon neck from the base point, further the main The peripheral edge of the tongue The casing has a configuration in contact with the inner wall surface of the casing, and the top surface side of the air inlet of the multi-blade fan side of the outlet of the casing is the top, and the opening end side of the outlet of the casing and the wind guide A slanting surface projecting gradually toward both sides of the back side of the road, and a peripheral end of the auxiliary tongue part is in contact with the inner wall surface of the casing, An inclined surface that gradually protrudes toward the back side of the air duct of the mouth, and at least one side of the inclined surface of the main tongue and a part of one side of the inclined surface of the auxiliary tongue form a ridge line portion. The centrifugal blower is configured to have a configuration in which the inclined surface of the auxiliary tongue portion and the start point of the air guide path are in contact with each other, and a configuration in which a ridge line portion is formed in a substantially radial direction of the casing.
第３の発明は、第１又は第２の発明の遠心送風機を搭載する衣類乾燥機である。 3rd invention is the clothes dryer which mounts the centrifugal blower of 1st or 2nd invention.
本発明によれば、薄型化するために遠心送風機の中央部を窪ませて回転電機を配置した遠心送風機においても、ファンケーシングの主板とケーシングの底面の接続部位で生じる循環流れ損失を低減することができるので、送風機の効率を向上可能である。また、本発明の遠心送風機を搭載する衣類乾燥機は、従来よりも機器の性能が向上可能である。 According to the present invention, even in a centrifugal blower in which a rotary electric machine is disposed by recessing the central portion of the centrifugal blower in order to reduce the thickness of the fan, the circulation flow loss generated at the connection portion between the main plate of the fan casing and the bottom surface of the casing is reduced. Therefore, the efficiency of the blower can be improved. Moreover, the clothes dryer which mounts the centrifugal blower of this invention can improve the performance of an apparatus conventionally.
本発明によれば、遠心送風機の出力を低下させることなく遠心送風機全体の高さを薄くすることが可能であり、騒音の増加も抑制することも可能である。 According to the present invention, it is possible to reduce the height of the entire centrifugal fan without reducing the output of the centrifugal fan, and it is also possible to suppress an increase in noise.
以下、本発明について、図面等を参照しながら説明する。なお、以下の実施の形態又は実施例によって本発明が限定されるものではない。 Hereinafter, the present invention will be described with reference to the drawings. In addition, this invention is not limited by the following embodiment or an Example.
まず、本発明の実施の形態の一例を以下に示す。 First, an example of an embodiment of the present invention is shown below.
（実施の形態）
回転電機（１）と、この回転電機の出力軸（３ａ）に装着される多翼ファン（１）と、この多翼ファンを収容しかつ前記多翼ファンが前記出力軸によって回転駆動されて前記出力軸の軸方向から吸気される空気の入り口である吸気口（１ａ）を備える共に前記多翼ファンの外径側から出力される出力風の通路を成す渦巻き状の導風路（２ｅ）と吸気された空気が吐き出される吹き出し口とを備えかつ前記吹き出し口の内側近傍に突出する主舌部（２１ａ）及び前記導風路の基点の近傍に配置される副舌部（２２ａ）を有するケーシング（２）とからなる遠心送風機（７）であり、前記ケーシングにおける前記多翼ファンの収容部の底部中央部は前記吸気口側へ突出する突出底を有し、さらに前記導風路の通路断面は前記基点から前記吹き出し口へと漸増しかつ渦巻き状の形態を成す構成を有し、さらに前記主舌部の周囲端部は前記ケーシングの内壁面に接する構成を有して、前記ケーシングの吹き出し口の多翼ファン側の吸気口の天面側を頂部（２１ｂ）として前記ケーシングの底部の、吹き出し口の開口端部側及び前記吹き出し口の奥側の両側に向かって徐々に張り出す傾斜面（２１ｃ）を有し、そしてさらに前記副舌部の周囲端部は前記ケーシングの内壁面に接する構成を有して、前記ケーシングの底部の、前記吹き出し口の奥側に向かって徐々に張り出す傾斜面（２２ｃ）を有し、少なくとも前記主舌部の傾斜面の一辺と前記副舌部の傾斜面の一辺の一部とが稜線部（２２ｄ）を成して接する構成を具備し、かつ前記副舌部の傾斜面と前記導風路の始点とが接する箇所は前記ケーシングの略径方向に稜線部（２２ｅ）を成す構成を具備する遠心送風機である。
(Embodiment)
The rotary electric machine (1), the multiblade fan (1) mounted on the output shaft (3a) of the rotary electric machine, the multiblade fan is accommodated, and the multiblade fan is driven to rotate by the output shaft. A spiral air guide path (2e) which has an air inlet (1a) which is an inlet of air sucked from the axial direction of the output shaft and which forms a path of output air output from the outer diameter side of the multiblade fan; A casing having a main tongue (21a) projecting in the vicinity of the inside of the air outlet and an auxiliary tongue (22a) disposed in the vicinity of the base point of the air guide path. (2) is a centrifugal blower (7), wherein the central portion of the bottom portion of the housing portion of the multi-blade fan in the casing has a projecting bottom projecting toward the intake port, and further, the passage cross section of the air guide passage Is the balloon from the base point And the peripheral end of the main tongue is in contact with the inner wall surface of the casing, and the multi-blade fan side of the outlet of the casing has a configuration that forms a spiral shape. An inclined surface (21c) that gradually protrudes toward the both sides of the opening end side of the air outlet and the back side of the air outlet, with the top side of the air inlet as the top (21b), Further, the peripheral end portion of the auxiliary tongue portion is configured to be in contact with the inner wall surface of the casing, and has an inclined surface (22c) that gradually protrudes toward the back side of the blowout port at the bottom portion of the casing. And at least one side of the inclined surface of the main tongue portion and a part of one side of the inclined surface of the auxiliary tongue portion form a ridge line portion (22d), and the inclined surface of the auxiliary tongue portion And the start point of the wind guide path Substantially in the radial direction of pacing is a centrifugal blower having a structure forming ridge portion (22e).
本発明の遠心送風機を図１に、Ａ−Ａ断面図を図２に、Ｂ−Ｂ断面図を図３に示す。図２に示すように本発明の遠心送風機７は空気の吸気口１ａを有する側板１ｂとそれに対面する主板１ｃと、これらの間に円形状に配置された複数の羽根１ｄを配した多翼ファン１と多翼ファン１を囲むケーシング２で構成されている。 FIG. 1 shows a centrifugal blower of the present invention, FIG. 2 shows an AA cross-sectional view, and FIG. 3 shows a BB cross-sectional view. As shown in FIG. 2, the centrifugal blower 7 of the present invention is a multi-blade fan in which a side plate 1b having an air inlet 1a, a main plate 1c facing the side plate 1b, and a plurality of blades 1d arranged in a circular shape therebetween. 1 and a casing 2 surrounding the multiblade fan 1.
図３及び図４に示すとおり、ケーシング２は、多翼ファン１の外周から間隔を設けて多翼ファン１の反回転方向に突形状をなす副舌部２２ａを基点として所定の回転角度まで渦巻き形状をなしたのち略直線状をした側壁２ｂ（渦巻状側壁）と、回転軸に垂直でありかつ多翼ファン１の側板１ｂに対向して吸入口を有する吸入面２ｃと、多翼ファン１の主板１ｃに対向してスクロールの基点からケーシング２の出口にかけて回転電機側に傾斜する底面２ｄとから構成される。 As shown in FIGS. 3 and 4, the casing 2 is spirally wound to a predetermined rotation angle with the auxiliary tongue 22 a that is spaced from the outer periphery of the multiblade fan 1 and projecting in the counter-rotating direction of the multiblade fan 1 as a base point. After forming the shape, the side wall 2b (spiral side wall) that is substantially straight, the suction surface 2c that is perpendicular to the rotation axis and faces the side plate 1b of the multiblade fan 1, and the multiblade fan 1 The bottom surface 2d is inclined from the base point of the scroll to the outlet of the casing 2 so as to face the main plate 1c.
多翼ファン１は回転電機３の出力軸３ａにナットなどで固定され回転電機３を駆動することにより回転し、側板１ｂに設けられた空気の吸気口１ａから吸引する流れが生じる。この流れは回転軸方向から半径方向に屈曲され、羽根１ｄによって動圧を与えられながら半径方向外側に向かって流れる。 The multiblade fan 1 is fixed to the output shaft 3a of the rotating electrical machine 3 by a nut or the like, and rotates when the rotating electrical machine 3 is driven, so that a flow of suction from an air inlet 1a provided in the side plate 1b is generated. This flow is bent in the radial direction from the rotation axis direction, and flows outward in the radial direction while being given dynamic pressure by the blade 1d.
多翼ファン１から流出した空気の流れは導風路２ｅによって集められ、減速して動圧から静圧に変換される。ケーシング２の側壁、吸込み面、底面で構成される導風路２ｅを通過した流れはケーシング２の吹き出し口２ｆから流出されるが、主舌部２１ａ及び副舌部
２２ａ近傍では、主舌部２１ａ、副舌部２２ａ及びケーシング２の底面２ｄと、多翼ファン１との隙間４によって周方向に流れる循環流れ５が若干生じる。なお、この循環流れ５が多くなると遠心送風機の出力の低下を招くことは言うまでも無い。
The flow of air flowing out from the multiblade fan 1 is collected by the air guide path 2e, decelerated, and converted from dynamic pressure to static pressure. The flow that has passed through the air guide path 2e constituted by the side wall, the suction surface, and the bottom surface of the casing 2 flows out from the outlet 2f of the casing 2, but in the vicinity of the main tongue portion 21a and the sub tongue portion 22a, the main tongue portion 21a. The sub-tongue 22a and the bottom surface 2d of the casing 2 and the clearance 4 between the multiblade fan 1 cause a slight circulating flow 5 flowing in the circumferential direction. Needless to say, when the circulation flow 5 increases, the output of the centrifugal blower is reduced.
ケーシング２の底面は中心部分が多翼ファン１側に突出しており、ここに回転電機３が配置されることにより遠心送風機の体格としての軸方向寸法を小さくして、小型化を図っている。さらに軸方向に寸法を小さくした場合でもケーシング２の圧力回復率を向上させるために、ケーシング２の底面をスクロールの基点からケーシング２の吹き出し口２ｆにかけて回転電機側に傾斜させて、ケーシングの径小化によって流路の半径方向幅が狭くなったかわりに、軸方向に寸法を広げて流路断面積を確保し、かつ流路断面積の拡大率を最適な形態としている。 The bottom surface of the casing 2 has a central portion protruding toward the multi-blade fan 1, and the rotary electric machine 3 is disposed here, so that the axial dimension as the physique of the centrifugal blower is reduced to reduce the size. Further, in order to improve the pressure recovery rate of the casing 2 even when the dimension is reduced in the axial direction, the bottom surface of the casing 2 is inclined toward the rotating electrical machine from the base point of the scroll to the outlet 2f of the casing 2 to reduce the casing diameter. Instead of narrowing the radial direction width of the flow path by increasing the size, the dimension is expanded in the axial direction to secure the flow path cross-sectional area, and the expansion ratio of the flow path cross-sectional area is set to the optimum form.
遠心送風機の小型化を図ると、遠心送風機の出力密度が高くなると騒音も増加する傾向にある。そこで、出力密度が高くても低騒音化を実現するためにケーシングの主舌部２１ａは図４に示すように多翼ファン１の側板側から主板側へ反回転方向に傾斜させている。つまり、主舌部２１ａの周囲端部はケーシング２の内壁面に接する構成を有して、ケーシング２の吹き出し口２ｆの多翼ファン１側の吸気口１ａの天面側を頂部２１ｂとしてケーシング２の底部の、吹き出し口の開口端部側及び前記吹き出し口の奥側の両側に向かって徐々に張り出す傾斜面２１ｃを有する構成である。 If the centrifugal blower is downsized, the noise tends to increase as the output density of the centrifugal blower increases. Therefore, in order to realize noise reduction even when the power density is high, the main tongue portion 21a of the casing is inclined in the counter-rotating direction from the side plate side of the multiblade fan 1 to the main plate side as shown in FIG. That is, the peripheral end portion of the main tongue portion 21a is in contact with the inner wall surface of the casing 2, and the top surface side of the air inlet 1a on the multi-blade fan 1 side of the air outlet 2f of the casing 2 is the top portion 21b. It has the structure which has the inclined surface 21c which protrudes gradually toward the both sides of the opening edge part side of a blowing outlet, and the back | inner side of the said blowing outlet.
そして、副舌部２２ａの周囲端部はケーシング２の内壁面に接する構成を有して、ケーシング２の底部の、前記吹き出し口の奥側に向かって徐々に張り出す傾斜面２２ｃを有し、少なくとも主舌部２１ａの傾斜面２１ｃの一辺と副舌部２２ａの傾斜面２２ｃの一辺の一部とが稜線部２２ｄを成して接する構成を具備し、かつ副舌部２２ａの傾斜面２２ｃと導風路２ｅの基点とが接する箇所はケーシング２の略径方向に稜線部２２ｅを成す構成を具備する。空気の流れと循環流れとにスムーズに分離することができ、かつ循環流れも減少させることも可能である。この様態を図６（ｂ）、（ｄ）、（ｅ）に示す。なお、稜線部２２ｄ及び稜線部２２ｅの稜線の頂部形状は、鋭角の凸形状、Ｒ形の凸形状など、気流の乱れを生じさせずかつ作成加工な容易な形状から適宜選択する。 And the peripheral edge part of the auxiliary tongue part 22a has the structure which contact | connects the inner wall face of the casing 2, and has the inclined surface 22c which protrudes gradually toward the back | inner side of the said blowing outlet of the bottom part of the casing 2, At least one side of the inclined surface 21c of the main tongue portion 21a and a part of one side of the inclined surface 22c of the auxiliary tongue portion 22a are in contact with each other by forming a ridge line portion 22d, and the inclined surface 22c of the auxiliary tongue portion 22a A location where the base point of the air guide path 2e is in contact has a configuration in which a ridge line portion 22e is formed in a substantially radial direction of the casing 2. It is possible to smoothly separate the air flow and the circulation flow and reduce the circulation flow. This mode is shown in FIGS. 6B, 6D, and 6E. Note that the top shapes of the ridge lines of the ridge line portion 22d and the ridge line portion 22e are appropriately selected from shapes that do not cause turbulence of the airflow and that are easy to create and process, such as an acute convex shape or an R-shaped convex shape.
このようにして、騒音の原因となる羽根の後縁１ｅが舌部を通過するときの急激な圧力変動が軸方向に分散され、羽根の回転により生じるＮｚ音（多翼ファンの回転数の羽根枚数倍周期の音）が低減される。なお、図４では傾斜が軸方向にほぼ一定の形状を示しているが、傾斜角度は一定ではなく除々に増減、又は階段状に形成してもよい。 In this way, sudden pressure fluctuations when the trailing edge 1e of the blade causing noise passes through the tongue are dispersed in the axial direction, and the Nz sound generated by the rotation of the blade (the blade having the rotational speed of the multiblade fan). (Sounds with a period of a number of sheets) is reduced. 4 shows a shape in which the inclination is substantially constant in the axial direction, the inclination angle is not constant, but may be gradually increased or decreased or may be formed in a staircase shape.
なお、従来の遠心送風機では、ケーシングの底面に図８に示す無効壁６ａとこの無効壁６ａに接して窪み形状６を有する構成が広く採用されている。また、この無効壁６ａの端部は主舌部６１ａの端部の一部と接する構成である。図６（ａ）、（ｃ）に示すようにこの窪み形状６に空気の流れが吸引され、空気の流れに渦を生じるとともに循環流れを誘導し、空気の流れに損失を生じさせていた。 In addition, in the conventional centrifugal blower, the structure which has the hollow shape 6 in contact with the invalid wall 6a shown in FIG. 8 and this invalid wall 6a in the bottom face of a casing is employ | adopted widely. Further, the end of the invalid wall 6a is in contact with a part of the end of the main tongue 61a. As shown in FIGS. 6 (a) and 6 (c), an air flow is sucked into the hollow shape 6 to generate a vortex in the air flow and induce a circulation flow, thereby causing a loss in the air flow.
一方、本発明は、上述した従来例である図６（ａ）、（ｃ）に示す無効壁６ａ及び窪み形状６に相当する構造を有さない構成であり、主舌部２１ａ及び副舌部２２ａを有する新規な構成である。 On the other hand, this invention is a structure which does not have the structure equivalent to the ineffective wall 6a and the hollow shape 6 shown to Fig.6 (a), (c) which are the prior art examples mentioned above, and the main tongue part 21a and the sublingual part 22a is a novel configuration.
本発明の遠心送風機と従来例の窪み形状６を有する遠心送風機とについて、静圧と効率を流体解析によって求めた結果を図７に示す。本発明の遠心送風機では静圧、効率ともに改善することができた。また、主舌部及び副舌部付近の圧力変動も従来例と比較して２８％低減することが確認されている。これにより、主舌部及び副舌部付近の損失の低減と、乱流による騒音の抑制により遠心送風機の高効率、低騒音を実現することができる。 FIG. 7 shows the result of the static pressure and the efficiency obtained by the fluid analysis for the centrifugal blower of the present invention and the centrifugal blower having the hollow shape 6 of the conventional example. The centrifugal blower of the present invention was able to improve both static pressure and efficiency. In addition, it has been confirmed that the pressure fluctuation in the vicinity of the main tongue and the auxiliary tongue is reduced by 28% compared to the conventional example. Thereby, high efficiency and low noise of the centrifugal blower can be realized by reducing the loss near the main tongue and the sub tongue and suppressing the noise due to the turbulent flow.
さらに、本発明の遠心送風機を洗濯乾燥機に搭載することにより、乾燥を確保しつつ小型・軽量化することができ、操作性を向上することができる。なお、本発明の実施例における多翼ファンの羽根の曲率や羽根枚数などは、設計的仕様に基づき任意に選択可能であり、特定の条件に限られるものではない。 Furthermore, by mounting the centrifugal blower of the present invention on a washing / drying machine, it is possible to reduce the size and weight while ensuring drying, and to improve operability. In addition, the curvature of the blades and the number of blades of the multiblade fan in the embodiment of the present invention can be arbitrarily selected based on design specifications, and are not limited to specific conditions.
本発明の遠心送風機は、小型化、高出力化、低騒音化に最適であり、家庭用衣類乾燥機用途などに有用である。 The centrifugal blower of the present invention is optimal for downsizing, high output, and low noise, and is useful for household clothes dryer applications.
１ 多翼ファン
１ａ 吸気口
１ｂ 側板
１ｃ 主板
１ｄ 羽根
１ｅ 後縁
２ ケーシング
２１ａ 主舌部
２１ｂ 頂部
２１ｃ 傾斜面
２２ａ 副舌部
２２ｃ 傾斜面
２２ｄ 稜線部
２２ｅ 稜線部
２ｂ 側壁
２ｃ 吸入面
２ｄ 底面
２ｅ 導風路
２ｆ 吹き出し口
３ 回転電機
３ａ 出力軸
４ 隙間
５ 循環流れ
６ 窪み形状
６ａ 無効壁
６１ａ 主舌部
７ 遠心送風機
DESCRIPTION OF SYMBOLS 1 Multiblade fan 1a Intake port 1b Side plate 1c Main plate 1d Blade 1e Trailing edge 2 Casing 21a Main tongue part 21b Top part 21c Inclined surface 22a Secondary tongue part 22c Inclined surface 22d Ridge part 22e Ridge part 2b Side wall 2c Inhalation surface 2d Bottom surface 2e Bottom surface 2e Road 2f Outlet 3 Rotating electrical machine 3a Output shaft 4 Clearance 5 Circulating flow 6 Recessed shape 6a Invalid wall 61a Main tongue 7 Centrifugal blower
Claims (3)
前記ケーシングにおける前記多翼ファンの収容部の底部中央部は前記吸気口側へ突出する突出底を有し、さらに前記導風路は前記基点から前記吹き出し口へと渦巻き状の形態を成す構成を有し、
さらに前記主舌部の周囲端部は前記ケーシングの内壁面に接する構成を有して、前記ケーシングの吹き出し口の多翼ファン側の吸気口の天面側を頂部として前記ケーシングの底部の、吹き出し口の開口端部側及び前記吹き出し口の奥側の両側に向かって徐々に張り出す傾斜面を有し、
そしてさらに前記副舌部の周囲端部は前記ケーシングの内壁面に接する構成を有して、前記ケーシングの底部の、前記吹き出し口の奥側に向かって徐々に張り出す傾斜面を有し、少なくとも前記主舌部の傾斜面の一辺と前記副舌部の傾斜面の一辺の一部とが稜線部を成して接する構成を具備する遠心送風機。 A rotary electric machine, a multi-blade fan mounted on the output shaft of the rotary electric machine, and the multi-blade fan that receives the multi-blade fan and is rotationally driven by the output shaft to be sucked in from the axial direction of the output shaft The air outlet includes an air inlet that is an air inlet, and a spiral air guide path that forms a passage for output air output from the outer diameter side of the multi-blade fan, and an air outlet from which the intake air is discharged. A centrifugal blower comprising a casing having a main tongue projecting in the vicinity of the inside of the mouth and a sub tongue disposed in the vicinity of a base point of the air guide path;
Configuration bottom center portion of the accommodating portion of the multiblade fan in the casing has a projecting bottom which projects into the intake port side, further wherein the air guide path forming the vortex winding form of into the balloon neck from the base point Have
Further, the peripheral end portion of the main tongue portion is configured to be in contact with the inner wall surface of the casing, and the blowout of the bottom portion of the casing with the top surface side of the intake port on the multi-blade fan side of the blowout port of the casing as a top portion. Having an inclined surface gradually projecting toward both sides of the opening end side of the mouth and the back side of the outlet,
Further, the peripheral end of the auxiliary tongue has a configuration in contact with the inner wall surface of the casing, and has an inclined surface that gradually protrudes toward the back side of the outlet at the bottom of the casing, A centrifugal blower having a configuration in which one side of the inclined surface of the main tongue portion and a part of one side of the inclined surface of the auxiliary tongue portion form a ridge line portion.
前記ケーシングにおける前記多翼ファンの収容部の底部中央部は前記吸気口側へ突出する突出底を有し、さらに前記導風路は前記基点から前記吹き出し口へと渦巻き状の形態を成す構成を有し、
さらに前記主舌部の周囲端部は前記ケーシングの内壁面に接する構成を有して、前記ケーシングの吹き出し口の多翼ファン側の吸気口の天面側を頂部として前記ケーシングの底部
の、吹き出し口の開口端部側及び前記吹き出し口の奥側の両側に向かって徐々に張り出す傾斜面を有し、
そしてさらに前記副舌部の周囲端部は前記ケーシングの内壁面に接する構成を有して、前記ケーシングの底部の、前記吹き出し口の奥側に向かって徐々に張り出す傾斜面を有し、少なくとも前記主舌部の傾斜面の一辺と前記副舌部の傾斜面の一辺の一部とが稜線部を成して接する構成を具備し、かつ前記副舌部の傾斜面と前記導風路の基点とが接する箇所は前記ケーシングの略径方向に稜線部を成す構成を具備する遠心送風機。 A rotary electric machine, a multi-blade fan mounted on the output shaft of the rotary electric machine, and the multi-blade fan that receives the multi-blade fan and is rotationally driven by the output shaft to be sucked in from the axial direction of the output shaft The air outlet includes an air inlet that is an air inlet, and a spiral air guide path that forms a passage for output air output from the outer diameter side of the multi-blade fan, and an air outlet from which the intake air is discharged. A centrifugal blower comprising a casing having a main tongue projecting in the vicinity of the inside of the mouth and a sub tongue disposed in the vicinity of a base point of the air guide path;
Configuration bottom center portion of the accommodating portion of the multiblade fan in the casing has a projecting bottom which projects into the intake port side, further wherein the air guide path forming the vortex winding form of into the balloon neck from the base point Have
Further, the peripheral end portion of the main tongue portion is configured to be in contact with the inner wall surface of the casing, and the blowout of the bottom portion of the casing with the top surface side of the intake port on the multi-blade fan side of the blowout port of the casing as a top portion. Having an inclined surface gradually projecting toward both sides of the opening end side of the mouth and the back side of the outlet,
Further, the peripheral end of the auxiliary tongue has a configuration in contact with the inner wall surface of the casing, and has an inclined surface that gradually protrudes toward the back side of the outlet at the bottom of the casing, A side of the inclined surface of the main tongue portion and a part of one side of the inclined surface of the auxiliary tongue portion form a ridge line portion, and the inclined surface of the auxiliary tongue portion and the air guide path A centrifugal blower having a configuration in which a portion in contact with a base point forms a ridge line portion in a substantially radial direction of the casing.
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| US9568017B2 (en) * | 2014-04-30 | 2017-02-14 | Denso International America, Inc. | Quieter centrifugal blower with suppressed BPF tone |
| WO2016147437A1 (en) * | 2015-03-19 | 2016-09-22 | サンデンホールディングス株式会社 | Blower |
| CN111980941A (en) * | 2019-05-23 | 2020-11-24 | 青岛海尔滚筒洗衣机有限公司 | Centrifugal fan and clothes dryer |
| JP2021080832A (en) * | 2019-11-14 | 2021-05-27 | 日立グローバルライフソリューションズ株式会社 | Blower and washing machine including the same |
| CN111022374B (en) * | 2019-11-19 | 2024-05-28 | 浙江理工大学 | Centrifugal pump volute casing with adjustable partition tongue shape |
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| JP4952006B2 (en) * | 2006-03-07 | 2012-06-13 | 株式会社デンソー | Centrifugal blower |
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