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公开(公告)号：US20200158129A1
公开(公告)日：2020-05-21
申请号：US16604727
申请日：2018-04-06
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Tooru IWATA , Hirotaka TOMIOKA
Abstract: In a blade of a propeller fan, an inclination angle (φ) is made by a straight line passing through an outer circumferential side end and an inner circumferential side end of a radial cross section of the blade with a second plane orthogonal to a center axis of a hub. In a blade end of the blade, one end in front of the other end viewed in the rotation direction of the propeller fan is a leading blade end, while the other end behind the leading blade end is a trailing blade end. The blade is shaped such that the inclination angle (φ) monotonically increases, in the direction from the intermediate position toward the trailing blade end, in an area extending from an intermediate position between the leading blade end and the trailing blade end to the trailing blade end.
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Patent Agency Ranking
公开(公告)号：US20170184125A1
公开(公告)日：2017-06-29
申请号：US15324338
申请日：2015-07-03
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Kazuyasu MATSUI , Shimei TEI , Tooru IWATA , Shigeyuki TAKAOKA
Abstract: A propeller fan includes a rotary blade hub driven in rotation about a rotation axis, and a rotary blade installed at an outer periphery of the rotary blade hub. The rotary blade includes a rotary blade body protruding from an outer peripheral surface of the rotary blade hub, and a rib formed on an outer peripheral edge portion of a pressure surface of the rotary blade body so as to extend along an outer peripheral edge of the rotary blade body.
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公开(公告)号：US20200088211A1
公开(公告)日：2020-03-19
申请号：US16620182
申请日：2018-05-28
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Tooru IWATA , Hirotaka TOMIOKA , Kaname MARUYAMA
Abstract: Blades (20a to 20c) of a propeller fan (10) have different circumferential pitches φ1, φ2, and φ3. The blades (20a to 20c) have different masses so that the center of gravity of the propeller fan (10) is positioned on a rotational center axis (11) of the propeller fan (10). Blade body portions (42c) of the blades (20a to 20c) have different thicknesses. In contrast, camber lines of the blades (20a to 20c) in blade cross section have the same shape, projections of the blades (20a to 20c) on a plane perpendicular to the rotational center axis (11) of the propeller fan (10) have the same shape, and leading edge portions (41a to 41c) of the blades (20a to 20c) have the same shape. As a result, a propeller fan (10) having reduced noise and vibrations can be achieved.
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公开(公告)号：US20150354584A1
公开(公告)日：2015-12-10
申请号：US14654391
申请日：2013-12-18
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Tooru IWATA , Kaname MARUYAMA , Shimei TEI
CPC classification number: F04D29/281 , F04D17/10 , F04D29/288 , F04D29/30 , F04D29/441
Abstract: A centrifugal fan includes a hub, a plurality of blades, and a shroud. The blades each have a curved part that is curved to incline toward a side on which air impinges when a connected end connected to an inwardly protruding portion of the shroud moves in a rotating direction of the centrifugal fan. The hub includes a hub-side diffuser ring that protrudes radially outward of the blades. The shroud includes a shroud-side diffuser ring that protrudes radially outward of the blades.
Abstract translation: 离心风扇包括轮毂，多个叶片和护罩。 当连接到护罩的向内突出部分的连接端沿离心式风扇的旋转方向移动时，叶片各自具有弯曲成朝向空气撞击的一侧倾斜的弯曲部分。 毂包括径向向外突出的叶片的毂侧扩散器环。 护罩包括沿叶片径向向外突出的护罩侧扩散器环。
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公开(公告)号：US20230228278A1
公开(公告)日：2023-07-20
申请号：US18125573
申请日：2023-03-23
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Zuozhou CHEN , Anan TAKADA , Tomohiro ISHIBASHI , Tooru IWATA , Kaname MARUYAMA
CPC classification number: F04D29/325 , F04D19/002
Abstract: A propeller fan includes a hub rotatable about an axis, and a plurality of blades extending radially outward from an outer peripheral surface of the hub. A ring surrounds the plurality of blades and is connected to each blade tip. A maximum camber location is on a camber line where a distance from a chord line to the camber line in an arc-shaped cross section of each blade about the axis is maximum. An axial height is from a trailing edge to the camber line in a direction along the axis. Each blade has a first portion provided inside in the radial direction of rotation and whose axial height at the maximum camber location is substantially constant, and a second portion provided outside in the radial direction of rotation and whose axial height at the maximum camber location increases toward the blade tip.
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公开(公告)号：US20190316599A1
公开(公告)日：2019-10-17
申请号：US16471284
申请日：2017-12-08
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Tooru IWATA , Hirotaka TOMIOKA
Abstract: In a blade of a propeller fan, a position on a chord line where the camber becomes maximum is set as a maximum camber position A, and a ratio of a distance d between a leading edge and the maximum camber position A to a chord length c is set as a maximum camber position ratio. The end portion on the hub side of the blade is set as a blade root, and the end portion on the outer circumferential side of the blade is set as a blade end. In the blade, the maximum camber position ratio monotonically increases in the direction from the reference blade cross section located between the blade root and the blade end toward the blade end and becomes maximum at the blade end. Thus, fan efficiency of the propeller fan is improved.
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