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公开(公告)号：US20200325909A1
公开(公告)日：2020-10-15
申请号：US16496544
申请日：2017-05-25
摘要： A propeller fan includes a rotary shaft portion that rotates around an axial center and a plurality of blades disposed around an outer circumferential portion of the rotary shaft portion. Each of the plurality of blades has at least one recessed portion that opens at a trailing edge of the blade. The at least one recessed portion has a first side that is close to an inner circumference of the blade. The first side stretches from the trailing edge toward a leading edge of the blade, and is bent toward an outer circumference of the blade.
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公开(公告)号：US20200269885A1
公开(公告)日：2020-08-27
申请号：US16494956
申请日：2018-05-21
发明人： Hiroaki MURAKAMI , Wahei SHINGU , Seiji NAKASHIMA
摘要： A boss fitted to a rotation shaft of a motor is placed on a bearing surface. An airflow producing unit includes blades protruding from the boss in a radial direction of the shaft and rotating with the boss. The boss includes a first end surface to contact the bearing surface when fitted to the shaft with a first end of the boss in a thickness direction facing the bearing surface, and a second end surface to contact the bearing surface when fitted to the shaft with a second end of the boss in the thickness direction facing the bearing surface. A degree of symmetry defined by A/B falls within a range of 1.0 to 1.3, where A is a height of the airflow producing unit from the first end surface, B is a height of the airflow producing unit from the second end surface, and A B.
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公开(公告)号：US20170275997A1
公开(公告)日：2017-09-28
申请号：US15507013
申请日：2014-10-30
发明人： Seiji NAKASHIMA , Yoshiki SATO , Keisuke OISHI
CPC分类号： F01D5/145 , F01D5/04 , F04D29/281 , F04D29/30 , F04D29/666 , F05D2240/303 , F05D2250/183
摘要： A turbofan includes a boss rotatable about an axis, a main plate connected to the boss, a shroud having an intake hole, and a plurality of blades arranged between the main plate and the shroud. An undulating protrusion portion is arranged at a front edge portion of each blade. The undulating protrusion portion includes a plurality of protrusions. The pitches of the plurality of protrusions are formed so as to become smaller as approaching to the main plate side.
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公开(公告)号：US20190277308A1
公开(公告)日：2019-09-12
申请号：US16329369
申请日：2016-11-18
发明人： Seiji NAKASHIMA , Yasuaki KATO , Wahei SHINGU , Hiroaki MURAKAMI
摘要： A propeller fan includes a boss and a blade. The boss rotates about an axis. The blade is provided at an outer periphery of the boss. The blade has a first region in a radial direction. In the first region, a blade chord center line shifts downstream toward an outer peripheral side. In a cylindrical cross section about an axis, a cross-sectional shape of the blade at least in the first region is an airfoil shape. When a cross section taken along the blade chord center line and projected onto a plane including the axis is viewed, the blade chord center line is a curve having a convex on a downstream side in an entire region in the radial direction.
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公开(公告)号：US20190010960A1
公开(公告)日：2019-01-10
申请号：US16069957
申请日：2016-02-26
CPC分类号： F04D29/665 , F04D25/0613 , F04D29/547 , F05B2260/96 , F24F1/38
摘要： A blower apparatus includes a propeller fan configured to rotate about a rotational axis, and a bell mouth annularly disposed to surround the propeller fan as seen in a direction of the rotational axis of the propeller fan. The bell mouth includes a flare portion located downstream of the propeller fan The flare portion has at least one first part and at least one second part. The first part has a first inner circumferential surface region. The second part as a second inner circumferential surface region. A first length of the first part inner circumferential surface region in the direction of the rotational axis is greater than a second length of the second part inner circumferential surface region in the direction of the rotational axis.
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公开(公告)号：US20180224135A1
公开(公告)日：2018-08-09
申请号：US15749826
申请日：2015-11-02
IPC分类号： F24F1/38
摘要： A casing has a wall portion surrounding an impeller, as seen in an axial direction of a rotating shaft. The wall portion of the casing has a portion, and a portion located further away from a center of rotation of the rotating shaft than the portion, as seen in the axial direction. A curved portion has a curved surface portion located on a line connecting the center of rotation and the portion, and a curved surface portion located on a line connecting the center of rotation and the portion, as seen in the axial direction. A radius of curvature of the curved surface portion is greater than a radius of curvature of the curved surface portion.
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公开(公告)号：US20190137120A1
公开(公告)日：2019-05-09
申请号：US16097852
申请日：2016-07-19
发明人： Katsuyuki YAMAMOTO , Seiji NAKASHIMA , Yohei KATO , Tsubasa TANDA
IPC分类号： F24F1/38
摘要： A bellmouth of a heat source unit includes: a straight tubular portion having a cylindrical shape; an air inlet portion which is radially expanded toward the upstream side, the air inlet portion has at least one angle-reduced portion that satisfies θ0>θi>0, where, an angle formed by a line L1 and a line L2 is taken as θ0, and an angle formed by a straight line L3 and the line L2 is taken as θi, the line L1 is a line passing through a portion of an outer peripheral end portion of the air inlet portion, the line L2 is a line passing through a connecting portion between the air inlet portion and the straight tubular portion, and the straight line L3 is a line connecting an intersection P of the line L1 and the line L2 and a portion of the outer peripheral end portion of the air inlet portion.
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公开(公告)号：US20150044058A1
公开(公告)日：2015-02-12
申请号：US14447977
申请日：2014-07-31
发明人： Shingo HAMADA , Seiji NAKASHIMA , Takashi IKEDA , Takahide TADOKORO , Takuya KODAMA , Takashi KOBAYASHI , Hiroshi YOSHIKAWA , Hiroaki MAKINO
CPC分类号： F04D29/384 , F04D19/002 , F04D29/386 , F05D2240/303 , F05D2240/304 , F05D2240/307 , F24F1/06 , F24F1/38
摘要： A leading edge of a blade has a first curved portion provided with a leading-edge rearmost point, and a trailing edge of the blade has a second curved portion located on the inner circumferential side of the trailing edge and a third curved portion located on the outer circumferential side of the blade on the trailing edge. The third curved portion has a trailing-edge foremost point, and the second curved portion has a trailing-edge rearmost point. The trailing edge and a first concentric circle, which is one of concentric circles having as their center an axis of rotation and passes through the leading-edge rearmost point, intersect each other at a first intersection. The first intersection is located between the trailing-edge rearmost point and the trailing-edge foremost point.
摘要翻译： 叶片的前缘具有设置有前缘最后点的第一弯曲部分，并且叶片的后缘具有位于后缘的内周侧上的第二弯曲部分和位于后缘的第三弯曲部分 叶片在后缘的外周侧。 第三弯曲部具有后缘最前端，第二弯曲部具有后缘最后点。 后缘和第一同心圆是以其中心为旋转中心并通过前缘最后点的同心圆之一，在第一交点相交。 第一个交叉点位于后缘最后点和后缘最前端之间。
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公开(公告)号：US20190040873A1
公开(公告)日：2019-02-07
申请号：US16072977
申请日：2016-02-24
摘要： Provided is an air-sending device in which, in blades, an upstream end of a blade outer periphery is more on an upstream side than an upstream end of a blade inner periphery as seen along a rotation axis, and a downstream end of a blade outer periphery is more on a downstream side than a downstream end of the blade inner periphery, and in which, in the blades, when an angle formed by a line segment, which connects a point internally dividing a line segment connecting the downstream end and the upstream end of an outer periphery of the blades along the rotation axis and a point internally dividing a line segment connecting the downstream end and the upstream end of an inner periphery of the blades along the rotation axis at the same ratio to each other, and a reference line is defined as θ, and a direction inclined toward the downstream side is defined as positive, the angle θ is changed from negative to positive at a duct portion.
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公开(公告)号：US20180238344A1
公开(公告)日：2018-08-23
申请号：US15756085
申请日：2015-11-02
摘要： An axial flow fan according to the present invention includes a plurality of blades, each of the blades including: a leading edge formed in front in a direction of rotation of the axial flow fan; an inner circumferential edge formed at an inner circumference of the blades; and an outer circumferential edge formed at an outer circumference of the blades, the outer circumferential edge configured to be at downstream of a fluid, forced to move by the axial flow fan, than the inner circumferential edge, the blade being reflexed toward upstream of the fluid at a portion adjacent to the outer circumferential edge, and having a local angle-decrease section having a blade inlet angle α at the leading edge decreasing from neighborhood, the local angle-decrease section being formed at a side of the leading edge and being located closer to the outer circumferential edge than to the inner circumferential edge.
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