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公开(公告)号：US20100098535A1
公开(公告)日：2010-04-22
申请号：US12653665
申请日：2009-12-16
IPC分类号： F04D29/44
CPC分类号： F04D29/30 , F04D29/4233
摘要： A centrifugal multi-blade fan has multiple blades about a rotational shaft and draws in air along the rotational shaft and then blows the air approximately perpendicular to the rotational shaft to reduce wind noise. A scroll casing encloses the multi-blade fan and defines a scroll-shaped airflow passage for directing the air blown from the multi-blade fan. The scroll casing has an intake opening and an outlet opening at a scroll end, in a downstream scroll casing portion. The scroll casing expands such that a flow passage cross-sectional area on the airflow downstream side is larger than that on an airflow upstream side. A ratio of a blade length to a diameter of the multi-blade fan is greater than or equal to 0.12, and an outer scroll casing radius, relative to the rotational axis, increases as a logarithmic spiral, its expansion angle being from 3.3° to 4.8°.
摘要翻译： 离心式多叶片风扇具有围绕旋转轴的多个叶片，并沿着旋转轴吸入空气，然后大致垂直于旋转轴吹送空气以减少风噪声。 涡旋壳体包围多叶片风扇并且限定用于引导从多叶片风扇吹出的空气的涡旋状气流通道。 涡旋壳体在下游涡旋壳体部分中具有在涡旋端处的进气开口和出口。 涡旋壳体膨胀，使得气流下游侧的流路横截面积大于气流上游侧的流路截面积。 叶片长度与多叶片风扇的直径的比率大于或等于0.12，并且相对于旋转轴线的外涡旋壳体半径随着对数螺旋而增加，其膨胀角为3.3°至 4.8°。
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公开(公告)号：US06769876B2
公开(公告)日：2004-08-03
申请号：US10245142
申请日：2002-09-16
IPC分类号： F04D2930
CPC分类号： F04D29/282 , F01D1/02 , F04D29/30 , F05D2260/96 , Y10S416/02
摘要： A centrifugal ventilator fan, which has improved fan performance and lower noise. A first outlet angle, on an upstream end of the fan, is less than a second outlet angle. Additionally, the first outlet angle is equal to zero degrees or greater and five degrees or less, while the second outlet angle is equal to thirty degrees or greater and forty five degrees or less. Furthermore, a first inlet angle, on an upstream end, is greater than a second inlet angle, on the opposite end. The first inlet angle is equal to sixty-five degrees or greater and ninety degrees or less, and the second inlet angle is equal to fifty-five degrees or more and seventy-five degrees or less.
摘要翻译： 离心通风机风扇，具有改善的风扇性能和较低的噪音。 在风扇的上游端上的第一出口角度小于第二出口角度。 此外，第一出口角度等于零度以上且五度以下，而第二出口角度等于三十度以上且四十五度以下。 此外，在上游端的第一入口角大于第二入口角，在另一端。 第一入口角度等于六十五度以上且九十度以下，第二入口角度等于五十五度以上且七十五度以下。
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公开(公告)号：US20070274833A1
公开(公告)日：2007-11-29
申请号：US11888080
申请日：2007-07-31
IPC分类号： F01D1/02
CPC分类号： F04D29/30 , F04D29/4233
摘要： A centrifugal multi-blade fan has multiple blades about a rotational shaft and draws in air along the rotational shaft and then blows the air approximately perpendicular to the rotational shaft to reduce wind noise. A scroll casing encloses the multi-blade fan and defines a scroll-shaped airflow passage for directing the air blown from the multi-blade fan. The scroll casing has an intake opening and an outlet opening at a scroll end, in a downstream scroll casing portion. The scroll casing expands such that a flow passage cross-sectional area on the airflow downstream side is larger than that on an airflow upstream side. A ratio of a blade length to a diameter of the multi-blade fan is greater than or equal to 0.12, and an outer scroll casing radius, relative to the rotational axis, increases as a logarithmic spiral, its expansion angle being from 3.3° to 4.8°.
摘要翻译： 离心式多叶片风扇具有围绕旋转轴的多个叶片，并沿着旋转轴吸入空气，然后大致垂直于旋转轴吹送空气以减少风噪声。 涡旋壳体包围多叶片风扇并且限定用于引导从多叶片风扇吹出的空气的涡旋状气流通道。 涡旋壳体在下游涡旋壳体部分中具有在涡旋端处的进气开口和出口。 涡旋壳体膨胀，使得气流下游侧的流路横截面积大于气流上游侧的流路截面积。 叶片长度与多叶片风扇的直径的比率大于或等于0.12，并且相对于旋转轴线的外涡旋壳体半径随着对数螺旋而增加，其膨胀角为3.3°至 4.8°。
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公开(公告)号：US06299409B1
公开(公告)日：2001-10-09
申请号：US09286002
申请日：1999-04-05
申请人： Kouji Matsunaga , Teruhiko Kameoka , Koji Ito , Tohru Tanaka , Yasushi Mitsuishi
发明人： Kouji Matsunaga , Teruhiko Kameoka , Koji Ito , Tohru Tanaka , Yasushi Mitsuishi
IPC分类号： F04D1708
CPC分类号： F04D29/661 , F04D29/162 , F04D29/703
摘要： In a centrifugal type blower unit, a diameter of an air suction port is set to be larger than a minimum inner diameter of a centrifugal fan, and a slanting portion is formed in each blade of the centrifugal fan at a side of the air suction port so that an inner radius dimension of the centrifugal fan is increased toward the air suction port. Therefore, it can prevent sub-flow air which is sucked into the centrifugal fan from an end side of the blades in an axial direction from interfering with main-flow air which is sucked into the centrifugal fan from an inner radius side of the blades. Thus, the blower unit can reduce second noise generated therefrom without greatly reducing air-blowing capacity.
摘要翻译： 在离心式鼓风机单元中，空气吸入口的直径设定为大于离心式风扇的最小内径，并且在空气吸入口侧的离心式风扇的每个叶片中形成有倾斜部 使得离心风扇的内径尺寸朝向空气吸入口增加。 因此，可以防止从叶片的端部侧沿轴向吸入离心风扇的副流动空气与从叶片的内径侧吸入离心式风扇的主流空气相干扰。 因此，鼓风机单元可以减少由此而产生的第二噪音，而不会大大降低送风能力。
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公开(公告)号：US20110229327A1
公开(公告)日：2011-09-22
申请号：US13065124
申请日：2011-03-15
IPC分类号： F01D5/22
CPC分类号： F04D29/281 , F04D29/30
摘要： A centrifugal multiblade fan includes a rotatable shaft, blades, a side shroud, and a main shroud. A front edge has a shape inclined radially outward in a direction from the main shroud toward the side shroud. When viewed from an axial direction, a corner part on a positive pressure surface-side is located on a tangential line of a positive pressure surface reference curve at a positive pressure surface side reference corner part, and when viewed from the axial direction, a curvature radius of a negative pressure surface becomes larger in a direction from the side shroud toward the main shroud.
摘要翻译： 离心多叶片风扇包括可旋转的轴，叶片，侧护罩和主护罩。 前缘具有从主护罩朝向侧护罩的方向径向向外倾斜的形状。 从轴向观察，正压面侧的角部位于正压面侧基准角部的正压面基准曲线的切线上，从轴向观察时的曲率 负压面的半径在从侧护罩朝向主护罩的方向上变大。
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公开(公告)号：US20070212218A1
公开(公告)日：2007-09-13
申请号：US11714521
申请日：2007-03-06
IPC分类号： F03B3/16
CPC分类号： F04D29/4226
摘要： A centrifugal blower having a fan including a blade. A scroll casing houses the fan and has a first axial wall portion, a second axial wall portion, and a side wall extending between the first and second axial wall portions. The scroll casing includes a suction port in the first axial wall portion. The scroll casing also defines a scroll start portion and a scroll finish portion. The scroll casing has a scroll radius measured transverse to the rotation axis that changes from the scroll start portion to the scroll finish portion. Also, a maximum radius of the scroll radius is closer to the second axial wall portion than the first axial wall portion.
摘要翻译： 一种具有包括叶片的风扇的离心式鼓风机。 涡旋壳体容纳风扇，并具有第一轴向壁部分，第二轴向壁部分和在第一和第二轴向壁部分之间延伸的侧壁。 涡旋壳体包括在第一轴向壁部分中的吸入口。 涡旋壳体还限定滚动开始部分和滚动整理部分。 涡旋壳体具有横向于从涡旋起始部分到滚动终点部分的旋转轴线测量的涡旋半径。 此外，涡旋半径的最大半径比第一轴向壁部更靠近第二轴向壁部。
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公开(公告)号：US09206817B2
公开(公告)日：2015-12-08
申请号：US13199400
申请日：2011-08-29
CPC分类号： F04D29/4233 , F04D17/10 , F04D17/16 , F04D17/162 , F04D29/4213 , F04D29/4226
摘要： A centrifugal blower provided with a spiral shaped scroll chamber where a bottom part of the scroll chamber gradually expands downward in the axial direction of the fan well along with expansion of the spiral and where a flow area gradually expands toward an air outlet from a spiral start part of the casing, the centrifugal blower having an initial slant angle θ0 at the spiral start part of the bottom part of the scroll chamber of a range of angle of 5.2° to 27.5° or setting a backflow prevention rib at the fan outlet.
摘要翻译： 一种设置有螺旋形涡旋室的离心式鼓风机，其中涡旋室的底部随着螺旋的膨胀在风扇的轴向方向上逐渐向下膨胀，并且流动面积从螺旋起始向空气出口逐渐膨胀 壳体的一部分，具有初始倾斜角度的离心式鼓风机;在涡旋室底部的螺旋起始部分处的角度为5.2°至27.5°的角度的0或在风扇出口处设置防回流肋 。
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公开(公告)号：US07281897B2
公开(公告)日：2007-10-16
申请号：US11313173
申请日：2005-12-20
IPC分类号： F04D29/30
CPC分类号： F04D29/282 , F04D29/30
摘要： Each of blades of a multi-blade centrifugal blower is provided with a taper portion, which is arranged at an inside periphery at least at the side of one rotation-shaft-direction end of the blade and tapers from the side of other rotation-shaft-direction end of the blade toward the side of the one rotation-shaft-direction end. The taper portion is positioned at a rotation-direction front side with respect to a back portion disposed at the side of the other rotation-shaft-direction end of the blade. Each of inlet angles throughout the taper portion is set in a range from 55° to 74°. Therefore, air flowing speed at an outlet of an impeller wheel is uniformed throughout the blade width. Work capacity and efficiency of the impeller wheel are increased, while noise is reduced.
摘要翻译： 多叶片离心式鼓风机的叶片中的每一个叶片均设置有锥形部，该锥形部至少在叶片的一个旋转轴方向端部的内侧配置，并且从其他旋转轴的一侧逐渐变细 叶片朝向一个旋转轴方向端侧的方向端。 锥形部分相对于设置在叶片的另一旋转轴方向端侧的后部位于旋转方向前侧。 整个锥形部分中的每个入口角度设定在55°至74°的范围内。 因此，在叶片宽度的叶轮的出口处的空气流动速度是均匀的。 增加叶轮的工作能力和效率，降低噪音。
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公开(公告)号：US08870541B2
公开(公告)日：2014-10-28
申请号：US13065124
申请日：2011-03-15
CPC分类号： F04D29/281 , F04D29/30
摘要： A centrifugal multiblade fan includes a rotatable shaft, blades, a side shroud, and a main shroud. A front edge has a shape inclined radially outward in a direction from the main shroud toward the side shroud. When viewed from an axial direction, a corner part on a positive pressure surface-side is located on a tangential line of a positive pressure surface reference curve at a positive pressure surface side reference corner part, and when viewed from the axial direction, a curvature radius of a negative pressure surface becomes larger in a direction from the side shroud toward the main shroud.
摘要翻译： 离心多叶片风扇包括可旋转的轴，叶片，侧护罩和主护罩。 前缘具有从主护罩朝向侧护罩的方向径向向外倾斜的形状。 从轴向观察，正压面侧的角部位于正压面侧基准角部的正压面基准曲线的切线上，从轴向观察时的曲率 负压面的半径在从侧护罩朝向主护罩的方向上变大。
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公开(公告)号：US20120057971A1
公开(公告)日：2012-03-08
申请号：US13199400
申请日：2011-08-29
IPC分类号： F01D25/24
CPC分类号： F04D29/4233 , F04D17/10 , F04D17/16 , F04D17/162 , F04D29/4213 , F04D29/4226
摘要： A centrifugal blower provided with a spiral shaped scroll chamber where a bottom part of the scroll chamber gradually expands downward in the axial direction of the fan well along with expansion of the spiral and where a flow area gradually expands toward an air outlet from a spiral start part of the casing, the centrifugal blower having an initial slant angle θ0 at the spiral start part of the bottom part of the scroll chamber of a range of angle of 5.2° to 27.5° or setting a backflow prevention rib at the fan outlet.
摘要翻译： 一种设置有螺旋形涡旋室的离心式鼓风机，其中涡旋室的底部随着螺旋的膨胀在风扇的轴向方向上逐渐向下膨胀，并且流动面积从螺旋起始向空气出口逐渐膨胀 壳体的一部分，具有初始倾斜角度的离心式鼓风机;在涡旋室底部的螺旋起始部分处的角度为5.2°至27.5°的角度的0或在风扇出口处设置防回流肋 。
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