JP2018100601A5

JP2018100601A5 -

Info

Publication number: JP2018100601A5
Application number: JP2016245731A
Authority: JP
Filing date: 2016-12-19
Publication date: 2019-04-25
Anticipated expiration: 2036-12-19

Description

吸入側ケース部と外側端面部との間には、吸入側ケース部と吸入側プレートとの隙間を介して径方向の外側から内側に向かう逆流の向きを軸方向に沿った向きに転向させる逆流転向流路（１２）が形成されている。 Between the suction side case portion and the outer end surface portion, the back flow is made to turn the direction of the back flow from the radially outer side to the inner side in the axial direction through the gap between the suction side case portion and the suction side plate. A diverting channel (12) is formed.

吸入口の周縁部位と内側端面部との間には、逆流を軸方向に沿って複数の羽根に流入させる逆流出口流路（１４）が形成されている。そして、吸入側ケース部と軸方向端面部との間には、逆流転向流路から逆流出口流路に向かう逆流の向きを径方向に沿った向きに転向させる逆流整流流路（１６）が形成されている。 Between the peripheral edge portion of the suction port and the inner end face portion, a backflow outlet flow path (14) is formed which allows the backflow to flow into the plurality of blades along the axial direction. And, between the suction side case portion and the axial end face portion, a reverse flow straightening flow path (16) is formed to turn the direction of the reverse flow from the reverse flow turning flow path to the reverse flow outlet flow path in the radial direction. It is done.

Claims

It is a centrifugal fan that flows air, and
A centrifugal fan (20) for blowing out air sucked from the axial direction of the rotating shaft (Ax) toward the outer side in the radial direction of the rotating shaft;
And a case (30) in which the centrifugal fan is accommodated, and an inlet (30a) for air sucked into the centrifugal fan is formed.
The centrifugal fan has a plurality of blades (22) radially disposed with respect to the axial center (SC) of the rotating shaft, and an annular suction side connecting ends of the plurality of blades on the suction port side. Comprising a plate (24),
The case is formed with the suction port and has a suction side case portion (32) facing the suction side plate with a predetermined gap.
The suction-side plate is a projecting end (28, 28A, 28B, 28C, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28D, 28C, 28D, 28C, 28D, for example) projecting to the suction side case side. 28E) is provided,
The projecting end is an inner end face (280, 280A, 280B, 280C, 280D, 280E) and an outer end face (282, 282A, 282B, 282C, 282D) facing in the radial direction with respect to the suction side case. 282E), and an axial end face (284, 284A, 284B, 284C, 284D, 284E) facing in the axial direction with respect to the suction side case part,
In the suction side case portion, the peripheral edge portion of the suction port is positioned inward of the inner end surface portion in the radial direction so that at least a part of the inner end surface portion is covered by the peripheral edge portion of the suction port. Yes,
Between the suction side case portion and the outer end surface portion, the direction of the backflow from the outer side to the inner side in the radial direction is along the axial direction via the gap between the suction side case portion and the suction side plate. A reverse flow turning channel (12) is formed to turn
Between the peripheral edge portion of the suction port and the inner end face portion, a backflow outlet flow path (14) is formed which allows the backflow to flow into the plurality of blades along the axial direction;
Between the suction side case portion and the axial end surface portion, a reverse flow straightening flow channel for turning the direction of the reverse flow from the reverse flow turning flow channel to the reverse flow outlet flow passage in the direction along the radial direction ( 16) The centrifugal fan that is formed.