JPWO2022153522A5

JPWO2022153522A5 -

Info

Publication number: JPWO2022153522A5
Application number: JP2022575026A
Authority: JP
Filing date: 2021-01-18
Publication date: 2023-03-28
Anticipated expiration: 2041-01-18

Description

本実施の形態において、入口２３ｂの内径は開口３１ａの内径Ｄｃよりも大きく、出口２３ａの内径Ｄｉは開口３１ａの内径Ｄｃ及び入口２３ｂの内径よりも小さい。図２におけるＤｃ及びＤｉは、開口３１ａの内径Ｄｃよりも、出口２３ａの内径Ｄｉの方が小さいことを表している。なお、本実施の形態において、回転軸１１から翼２２の回転軸１１から遠い方の端までの長さは、回転軸１１から入口２３ｂの端までの長さと同じである。すなわち、羽根車２０の空気導入部２３の外径と翼２２部分の外径は同じであり、羽根車２０の外径の大きさは一定である。 In this embodiment, the inner diameter of the inlet 23b is larger than the inner diameter Dc of the opening 31a, and the inner diameter Di of the outlet 23a is smaller than the inner diameter Dc of the opening 31a and the inner diameter of the inlet 23b. Dc and Di in FIG. 2 represent that the inner diameter Di of the outlet 23a is smaller than the inner diameter Dc of the opening 31a. In this embodiment, the length from rotating shaft 11 to the end of blade 22 farther from rotating shaft 11 is the same as the length from rotating shaft 11 to the end of inlet 23b. That is, the outer diameter of the air introduction portion 23 of the impeller 20 and the outer diameter of the blade 22 portion are the same, and the size of the outer diameter of the impeller 20 is constant.

本実施の形態において空気導入部２３は、実施の形態１と同様に開口３１ａ側の入口２３ｂよりも主板２１側の出口２３ａの内径が小さいベルマウス形状をしている。そして、本実施の形態においては、入口２３ｂの外径Ｄｆが開口３１ａ内径Ｄｃよりも小さい。また、羽根車２０の外径の大きさは一定であるから、羽根車２０全体の外径も開口３１ａの内径Ｄｃよりも小さくなる。また、出口２３ａの内径Ｄｉは開口３１ａの内径Ｄｃよりも内径が小さい。図６におけるＤｃ、Ｄｉ及びＤｆは、開口３１ａの内径Ｄｃよりも出口２３ａの内径Ｄｉ及び羽根車２０の外径Ｄｆの方が小さいことを表している。 In the present embodiment, the air introduction portion 23 has a bell mouth shape in which the inner diameter of the outlet 23a on the main plate 21 side is smaller than the inner diameter of the inlet 23b on the opening 31a side, as in the first embodiment. In this embodiment, the outer diameter Df of the inlet 23b is smaller than the inner diameter Dc of the opening 31a. Further, since the outer diameter of the impeller 20 is constant, the outer diameter of the entire impeller 20 is also smaller than the inner diameter Dc of the opening 31a. Also, the inner diameter Di of the outlet 23a is smaller than the inner diameter Dc of the opening 31a. Dc, Di, and Df in FIG. 6 represent that the inner diameter Di of the outlet 23a and the outer diameter Df of the impeller 20 are smaller than the inner diameter Dc of the opening 31a.

１０駆動モータ、１１回転軸、２０，２０ａ，２０ｂ，２０ｃ羽根車、２１主板、２２翼、２３，２４，２５空気導入部、２３ａ，２４ａ，２５ａ出口、２３ｂ，２４ｂ，２５ｂ入口、２６外縁部、３０ケーシング、３１開口面、３１ａ開口、３２側面、３３底面、３４舌部、３４ａ吹出口、３５，３６，３７突出部、１００遠心送風機。 Reference Signs List 10 drive motor, 11 rotary shaft, 20, 20a, 20b , 20c impeller, 21 main plate, 22 blades, 23, 24, 25 air introduction portion, 23a, 24a, 25a outlet, 23b, 24b, 25b inlet, 26 Outer edge 30 casing 31 opening 31a opening 32 side 33 bottom 34 tongue 34a outlet 35, 36, 37 protrusion 100 centrifugal blower .

Claims

a drive motor having a rotating shaft;
a casing having an opening surface provided with an opening in the axial direction of the rotating shaft;
An inlet provided rotatably around the rotating shaft inside the casing, blowing air from the axial direction of the rotating shaft in a centrifugal direction and taking in the air to the opening side, and inner diameters of the opening and the inlet an impeller provided with an air introduction portion having an air outlet having an inner diameter smaller than the
The inner diameter of the opening is larger than the outer diameter of the impeller inside the casing,
the outer diameter of the inlet of the air introduction portion is larger than the inner diameter of the opening;
A centrifugal blower , wherein the inlet of the air introduction portion is exposed to the outside of the casing .

2. The centrifugal blower according to claim 1, wherein the air passage cross-sectional area of said opening is constant along the air passage.

3. The centrifugal blower according to claim 1 , wherein the casing has projections projecting toward the inside of the casing around the opening.

The air introduction portion has an outer edge portion at the inlet, in which a gap with the opening surface of the casing increases from the inner side to the outer side in the radial direction of the rotating shaft, and the gap decreases further toward the outer side. The centrifugal fan according to any one of claims 1 to 3, characterized in that: