JPS62173600U

JPS62173600U -

Info

Publication number: JPS62173600U
Application number: JP6249586U
Authority: JP
Priority date: 1986-04-24
Filing date: 1986-04-24
Publication date: 1987-11-04

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示すインテークユニ
ツトの概略断面図、第２図は同実施例に係るシロ
ツコフアンの全体斜視図、第３図は第２図に示す
―線に沿う断面図、第４図は従来例に係るイ
ンテークユニツトの概略断面図、第５図は従来の
シロツコフアンを示す全体斜視図である。７……ボス部、８……主板、１３……型抜き用
孔、２０……シロツコフアン、２１……羽根板、
２１ａ……反主板側端部、２２……リング体、３
０……インテークユニツト、３１……ベルマウス
、３２……補助ベルマウス、３３……凹所、３４
……循環防止突起。 Fig. 1 is a schematic sectional view of an intake unit showing an embodiment of the present invention, Fig. 2 is an overall perspective view of a Sirotskov fan according to the same embodiment, and Fig. 3 is a sectional view taken along the line shown in Fig. 2. FIG. 4 is a schematic cross-sectional view of a conventional intake unit, and FIG. 5 is an overall perspective view showing a conventional Shirotsuko fan. 7...Boss part, 8...Main plate, 13...Mold-cutting hole, 20...Syrotskov fan, 21...Blade plate,
21a... end opposite to the main plate, 22... ring body, 3
0...Intake unit, 31...Bell mouth, 32...Auxiliary bell mouth, 33...Recess, 34
...Circulation prevention protrusion.

Claims

[Scope of utility model registration request]

In an air blowing device in which a Shirotsuko fan 20 having a plurality of blade plates erected at predetermined intervals in the circumferential direction of a main plate 8 is installed in a unit 30 to which a bell mouth 31 is attached, The main plate side end portion 21a is connected by a disc-shaped ring body 22 in which a cylindrical backflow prevention protrusion 34 that projects in the axial direction is formed, and the circulation prevention protrusion 34 contacts the fan side side surface of the bell mouth 31. A blower device characterized in that a recess 33 is formed in which the air blower is accommodated.