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公开(公告)号：US12038017B2
公开(公告)日：2024-07-16
申请号：US17255826
申请日：2018-08-31
发明人： Hiroyasu Hayashi , Takuya Teramoto , Kazuya Michikami , Ryo Horie , Takahiro Yamatani , Hiroshi Tsutsumi
CPC分类号： F04D29/4206 , F04D29/281 , F25D17/067
摘要： In a centrifugal air-sending device, a first area portion has a first vertex that is an intersection point of a curve line formed by a tongue portion and a bisector of a first connection straight line connecting a winding start portion and an end of a discharge portion. A second area portion has a second vertex that is an intersection point of the curve line formed by the tongue portion and a bisector of a second connection straight line connecting the winding start portion and the end of the discharge portion. When a virtual straight line connecting a rotational axis and the first vertex is defined as a first straight line, and a virtual straight line connecting the rotational axis and the second vertex is defined as a second straight line, the second straight line is longer than the first straight line.
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公开(公告)号：US12000602B2
公开(公告)日：2024-06-04
申请号：US18248475
申请日：2020-11-27
IPC分类号： F04D29/30 , F04D29/42 , F24F1/0022
CPC分类号： F24F1/0022 , F04D29/30 , F04D29/422 , F04D29/4226
摘要： An air-conditioning apparatus includes: a centrifugal air-sending device including a fan and a scroll casing having a tongue portion and a discharge portion, and a housing having a housing suction port and a discharge portion. A trailing edge of a blade located closest to a wall portion of the housing is a first trailing edge portion, and a leading edge of a blade located closest to the tongue portion is a first leading edge portion. In a first region, a boundary portion located closest to the tongue portion is located between first and second straight lines. The first straight line passes through a rotation axis of the fan and the first trailing edge portion, the second straight line is parallel to the first straight line and passes through the first leading edge portion, and the first region forms part of the housing suction port close to the tongue portion.
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3.发明授权公开(公告)号：US11994148B2
公开(公告)日：2024-05-28
申请号：US17287826
申请日：2018-12-19
发明人： Hiroyasu Hayashi , Takuya Teramoto , Kazuya Michikami , Ryo Horie , Takahiro Yamatani , Hiroshi Tsutsumi
CPC分类号： F04D29/4226 , F24F7/007
摘要： A centrifugal fan includes a fan configured to be driven to rotate, and a scroll casing housing the fan. The scroll casing includes a peripheral wall having a volute shape having an inner end of a spiral thereof at a boundary with a tongue portion of the scroll casing. When a portion at the peripheral wall at which a distance between the peripheral wall and a rotation shaft of the fan is minimum is defined as a closest portion, the peripheral wall includes a narrowed portion at which the distance between the peripheral wall and the rotation shaft is reduced from the inner end toward the closest portion in a rotation direction of the fan, and an expanded portion that is formed between the narrowed portion and the closest portion and at which the distance between the peripheral wall and the rotation shaft is increased.
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公开(公告)号：US11976824B2
公开(公告)日：2024-05-07
申请号：US17603724
申请日：2019-06-13
CPC分类号： F24F1/0022 , F04D29/4226 , F04D29/44
摘要： A centrifugal fan includes: an impeller having a back plate; and a scroll casing including a peripheral wall having a volute shape, a first side wall facing a virtual extension of the back plate and an inner end portion of the volute shape of the scroll casing, an expanded portion, and a first edge end portion being an end of a first edge defining the discharge port, of the first side wall, are arranged in a named order in the rotation direction, the first edge end portion being farther from the rotation shaft than an other end of the first edge and distance L1≥distance LM>distance LS is satisfied where LS is a distance between the first side wall at the inner end portion of the volute shape and the virtual extension of the back plate, LM is a distance between the first side wall at the expanded portion and the virtual extension of the back plate, the expanded portion being a portion at which the distance between the first side wall and the virtual extension of the back plate is larger than LS, and L1 is a distance between the first side wall at the first edge end portion and the virtual extension of the back plate.
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公开(公告)号：US11885339B2
公开(公告)日：2024-01-30
申请号：US17288319
申请日：2018-10-30
发明人： Takuya Teramoto , Hiroyasu Hayashi , Atsushi Kono , Ryo Horie , Kazuya Michikami , Takahiro Yamatani , Hiroshi Tsutsumi
CPC分类号： F04D17/10 , F04D17/162 , F04D29/281 , F04D29/424 , F04D29/5826 , F24F1/0022 , F05D2250/52
摘要： A turbo fan includes a main plate and a plurality of blade portions. The plurality of blade portions include a plurality of first blade portions and a plurality of second blade portions. In a case where, in each of the plurality of first blade portions, a length of a virtual straight line connecting a first inner peripheral end part and a first outer peripheral end part is defined as a first chord length, and in each of the plurality of second blade portions, a length of a virtual straight line connecting a second inner peripheral end part and a second outer peripheral end part is defined as a second chord length, the first chord length and the second chord length are not equal to each other at positions separated by a same distance from the main plate in the axial direction of the rotary shaft.
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公开(公告)号：USD944966S1
公开(公告)日：2022-03-01
申请号：US29694038
申请日：2019-06-06
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公开(公告)号：US11808270B2
公开(公告)日：2023-11-07
申请号：US17438553
申请日：2019-04-25
发明人： Takuya Teramoto , Hiroyasu Hayashi , Ryo Horie , Kazuya Michikami , Takahiro Yamatani , Hiroshi Tsutsumi
CPC分类号： F04D17/162 , F04D29/282 , F04D29/30 , F04D29/424 , F04D29/44 , F04D29/60 , F04D29/68
摘要： An impeller includes a backing plate, a rim disposed so as to face the backing plate, and a plurality of blades arranged in a circumferential direction around a virtual rotation axis of the backing plate. Each of the plurality of blades has an inner circumferential end, an outer circumferential end a sirocco blade portion being forward-swept and including the outer circumferential end and having a blade outlet angle of larger than 90 degrees, and a turbo blade portion being swept-back and including the inner circumferential end, a first region located closer to the backing plate than a middle point in an axial direction of the rotation axis, and a second region located closer to the rim than the first region. Each of the plurality of blades is formed such that a blade length in the first region is longer than a blade length in the second region. In the first region and the second region, a ratio of the turbo blade portion in the radial direction is larger than a ratio of the sirocco blade portion in the radial direction.
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8.发明授权公开(公告)号：US11274678B2
公开(公告)日：2022-03-15
申请号：US17042620
申请日：2018-05-21
发明人： Takuya Teramoto , Ryo Horie , Takahiro Yamatani , Kazuya Michikami , Hiroshi Tsutsumi , Hiroyasu Hayashi
IPC分类号： F04D29/42 , F04D29/44 , F04D29/66 , F24F1/0022
摘要： A centrifugal blower includes a fan including a main plate having a disk-shape, and a plurality of blades, and a scroll casing configured to accommodate the fan. The scroll casing includes a discharge portion and a scroll portion including a side wall, a circumferential wall, and a tongue portion. The circumferential wall includes a curved circumferential wall and a flat circumferential wall. In comparison with a centrifugal blower including a standard circumferential wall having a logarithmic spiral shape in cross-section perpendicular to a rotational shaft of the fan, in the curved circumferential wall, at a first end being a boundary between the circumferential wall and the tongue portion and at a second end being a boundary between the circumferential wall and the discharge portion, a distance L1 between an axis of the rotational shaft and the circumferential wall is equal to a distance L2 between the axis of the rotational shaft and the standard circumferential wall.
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公开(公告)号：USD938571S1
公开(公告)日：2021-12-14
申请号：US29694037
申请日：2019-06-06
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公开(公告)号：USD938570S1
公开(公告)日：2021-12-14
申请号：US29694036
申请日：2019-06-06
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