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    CENTRIFUGAL COMPRESSOR AND TURBOCHARGER
    5.
    发明公开
    CENTRIFUGAL COMPRESSOR AND TURBOCHARGER 审中-公开

    公开(公告)号：EP3369939A1

    公开(公告)日：2018-09-05

    申请号：EP15911386.9

    申请日：2015-12-25

    申请人： Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.

    发明人： IWAKIRI, Kenichiro ,  TOMITA, Isao

    IPC分类号： F04D29/44

    CPC分类号： F01D9/026 ,  F04D17/10 ,  F04D29/4226 ,  F04D29/441 ,  F04D29/444 ,  F04D29/624 ,  F04D29/667 ,  F05D2220/40 ,  F05D2250/15 ,  F05D2250/25 ,  F05D2250/52

    摘要： A centrifugal compressor includes an impeller and a casing. The casing includes a scroll part forming a scroll flow passage on a radially outer side of the impeller and a diffuser part forming a diffuser flow passage for supplying the scroll flow passage with compressed air compressed by the impeller. The diffuser part includes: a first diffuser portion belonging to a first angular range including an angular position of a tongue section of the scroll part, of an angular range in a circumferential direction of the impeller; and a second diffuser portion belonging to a second angular range downstream of the first angular range in a flow direction of the scroll flow passage, of the angular range in the circumferential direction of the impeller, the second diffuser portion having an outer radius R2 which is defined along a reference circle centered at a rotational center of the impeller. An outer radius R1 of the first diffuser portion in the first angular range is smaller than the outer radius R2 of the second diffuser portion in the second angular range.

    BLOWER DEVICE AND CLEANER
    6.
    发明公开
    BLOWER DEVICE AND CLEANER 审中-公开

    公开(公告)号：EP3348843A1

    公开(公告)日：2018-07-18

    申请号：EP16844181.4

    申请日：2016-08-24

    申请人： Nidec Corporation

    发明人： HAYAMITSU, Ryosuke

    IPC分类号： F04D29/44 ,  A47L9/00

    CPC分类号： A47L9/00 ,  F04D25/06 ,  F04D25/08 ,  F04D29/281 ,  F04D29/4206 ,  F04D29/44 ,  F04D29/441

    摘要： An air blowing device includes a motor, a ring-shaped cover, an impeller, and an impeller housing. The impeller includes a base portion and moving blades. The impeller housing includes an exhaust air guide portion that extends toward an outer side in the radial direction and toward a lower side, at a side further outward from an outer edge of the impeller in the radial direction. The ring-shaped cover includes a ring-shaped cover upper face portion that faces the base portion in the axial direction, and a ring-shaped cover outer edge portion that is positioned further on the outer side from the outer edge of the impeller in the radial direction. An outer face of the ring-shaped cover outer edge portion and an inner face of the exhaust air guide portion are disposed across a gap, and the gap configures a flow path through which a fluid flowing in from the impeller is guided. The gap has a first width where a distance between the outer face of the ring-shaped cover outer edge portion and the inner face of the exhaust air guide portion is shortest, in a region further to the outer side from the radial-direction inner edge of the ring-shaped cover outer edge portion and further to the inner side from the radial-direction outer edge of the ring-shaped cover outer edge portion. The first width is smaller than a flow-in opening width where the fluid flows into the gap and a flow-out opening width where the fluid flows out from the gap, which are the gap.