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    IMPELLER, CENTRIFUGAL FAN, AND AIR-CONDITIONING APPARATUS
    1.
    发明申请
    IMPELLER, CENTRIFUGAL FAN, AND AIR-CONDITIONING APPARATUS 有权

    公开(公告)号：US20230130474A1

    公开(公告)日：2023-04-27

    申请号：US17915389

    申请日：2020-10-22

    Applicant: Mitsubishi Electric Corporation

    Inventor： Takuya TERAMOTO ,  Hiroyasu HAYASHI ,  Ryo HORIE ,  Takashi YAMAGUCHI ,  Tomohiro NAGANO ,  Kazuya MICHIKAMI ,  Takahiro YAMATANI

    IPC: F04D29/28 ,  F24F1/0022 ,  F04D17/16 ,  F04D25/06

    Abstract: An impeller includes: a main plate to be rotated; an annular side plate having a suction port for air; and blades in a circumferential direction. Each of the blades has: an inner peripheral end; an outer peripheral end; a sirocco blade portion that includes the outer peripheral end, and forms a forward-swept blade; and a turbo blade portion that includes the inner peripheral end and forms a swept-back blade. The blade has an end portion facing the suction port and a base portion connected to the main plate, and the end portion has a smaller thickness than that of the base portion in the sirocco blade portion. The end portion of the blade has a blade shape, and in the end portion having the blade shape, a first blade thickness of an inner circumferential side of the impeller is greater than a second blade thickness of the outer circumferential side.

    MULTI-BLADE CENTRIFUGAL AIR-SENDING DEVICE
    2.
    发明公开
    MULTI-BLADE CENTRIFUGAL AIR-SENDING DEVICE 审中-公开

    公开(公告)号：US20240026899A1

    公开(公告)日：2024-01-25

    申请号：US18043917

    申请日：2020-10-23

    Applicant: Mitsubishi Electric Corporation

    Inventor： Hiroyasu HAYASHI ,  Takuya TERAMOTO ,  Katsuhiro FUJIKI ,  Wahei SHINGU

    IPC: F04D29/42 ,  F04D29/28 ,  F04D17/08

    CPC classification number: F04D29/4226 ,  F04D29/281 ,  F04D17/08

    Abstract: A multi-blade centrifugal air-sending device includes an impeller including a back plate having a disk shape, a plurality of blades arranged at a peripheral portion of the back plate in a circumferential direction, and a rim having an annular shape and disposed to face the back plate, the rim fixing the plurality of blades; and a scroll casing having a spiral shape and housing the impeller, the scroll casing being configured such that air is introduced from the side of the rim and blown out to the outer peripheral side. The impeller is constituted by a metal. Each of the blades has a wall thickness constant from the side of the back plate to the side of the rim and extends toward the inner side further than an inner peripheral end of the rim.

    CENTRIFUGAL FAN, AIR CONDITIONING APPARATUS, AND REFRIGERATION CYCLE APPARATUS
    3.
    发明申请
    CENTRIFUGAL FAN, AIR CONDITIONING APPARATUS, AND REFRIGERATION CYCLE APPARATUS 有权

    公开(公告)号：US20220196254A1

    公开(公告)日：2022-06-23

    申请号：US17603724

    申请日：2019-06-13

    Applicant: Mitsubishi Electric Corporation

    Inventor： Hiroyasu HAYASHI ,  Takuya TERAMOTO ,  Ryo HORIE ,  Takahiro YAMATANI ,  Hiroshi TSUTSUMI

    IPC: F24F1/0022 ,  F04D29/42

    Abstract: A centrifugal fan includes: an impeller having a back plate; and a scroll casing including a peripheral wall 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.

    IMPELLER, MULTI-BLADE AIR-SENDING DEVICE, AND AIR-CONDITIONING APPARATUS
    4.
    发明申请
    IMPELLER, MULTI-BLADE AIR-SENDING DEVICE, AND AIR-CONDITIONING APPARATUS 有权

    公开(公告)号：US20220145893A1

    公开(公告)日：2022-05-12

    申请号：US17438553

    申请日：2019-04-25

    Applicant: Mitsubishi Electric Corporation

    Inventor： Takuya TERAMOTO ,  Hiroyasu HAYASHI ,  Ryo HORIE ,  Kazuya MICHIKAMI ,  Takahiro YAMATANI ,  Hiroshi TSUTSUMI

    IPC: F04D17/16 ,  F04D29/28 ,  F04D29/30 ,  F04D29/42 ,  F04D29/44 ,  F04D29/60 ,  F04D29/68

    Abstract: 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.

    OUTDOOR UNIT OF REFRIGERATION CYCLE APPARATUS
    5.
    发明申请
    OUTDOOR UNIT OF REFRIGERATION CYCLE APPARATUS 有权

    公开(公告)号：US20240392979A1

    公开(公告)日：2024-11-28

    申请号：US18684031

    申请日：2021-10-25

    Applicant: Mitsubishi Electric Corporation

    Inventor： Takuya TERAMOTO ,  Hiroyasu HAYASHI ,  Ryoji ABE ,  Kohei KASAI ,  Koji YAMAGUCHI ,  Kazuya OKADA

    IPC: F24F1/38 ,  F24F1/40 ,  F24F13/30

    Abstract: There is provided an outdoor unit of refrigeration cycle apparatus that can obtain a large airflow volume even when an external static pressure is high, while preventing an increase in size of the outdoor unit. For this object, the outdoor unit includes a housing in which a machine chamber and a blower chamber are formed, the blower chamber housing a heat exchanger and a blower inside. The blower is a double inlet centrifugal blower including: an impeller; and a scroll casing having suction ports and a discharge port, the scroll casing housing the impeller inside. A plurality of discharge ports are located on an outlet placement surface of the housing. A total width of the plurality of discharge ports in a direction horizontal with the housing placed and parallel to the outlet placement surface is more than a width of the blower chamber in said direction.

    CENTRIFUGAL BLOWER, AIR-SENDING DEVICE, AIR-CONDITIONING DEVICE, AND REFRIGERATION CYCLE DEVICE
    9.
    发明申请
    CENTRIFUGAL BLOWER, AIR-SENDING DEVICE, AIR-CONDITIONING DEVICE, AND REFRIGERATION CYCLE DEVICE 有权

    公开(公告)号：US20210140445A1

    公开(公告)日：2021-05-13

    申请号：US17042620

    申请日：2018-05-21

    Applicant: MITSUBISHI ELECTRIC CORPORATION

    Inventor： Takuya TERAMOTO ,  Ryo HORIE ,  Takahiro YAMATANI ,  Kazuya MICHIKAMI ,  Hiroshi TSUTSUMI ,  Hiroyasu HAYASHI

    IPC: F04D29/44 ,  F04D29/42

    Abstract: 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.

    CENTRIFUGAL AIR-SENDING DEVICE AND AIR-CONDITIONING APPARATUS
    10.
    发明申请
    CENTRIFUGAL AIR-SENDING DEVICE AND AIR-CONDITIONING APPARATUS 有权

    公开(公告)号：US20250012292A1

    公开(公告)日：2025-01-09

    申请号：US18709963

    申请日：2022-01-17

    Applicant: Mitsubishi Electric Corporation

    Inventor： Hiroyasu HAYASHI ,  Takuya TERAMOTO

    IPC: F04D29/42 ,  F04D17/10 ,  F24F1/0022

    Abstract: A centrifugal air-sending device includes a fan and a scroll casing. The scroll casing has a tongue portion and an extension plate. The extension plate is plate-shaped and extends from the tongue portion. The extension plate has one portion that is closer to a side plate than is another portion of the extension plate that is closer to a main plate than is the one portion. The one portion is formed longer than the other portion. The extension plate has an extreme distal end. The scroll casing has, when projected in an axial direction of a rotation axis, a tongue-portion-side end that is located in a discharge-port edge that is a portion that corresponds to a discharge port. The tongue-portion-side end is located opposite to the extreme distal end in a circumferential direction across a reference line drawn perpendicular to the discharge-port edge from the rotation axis.

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