JPH0268672U

JPH0268672U -

Info

Publication number: JPH0268672U
Application number: JP14544688U
Authority: JP
Priority date: 1988-11-09
Filing date: 1988-11-09
Publication date: 1990-05-24

Description

[Brief explanation of drawings]

第１図は本考案になる軸流フアンの構造を示す
部分断面を含む正面図ａと、断面図ｂ、第２図は
従来技術による軸流フアンの構造を示す部分断面
を含む正面図ａと、断面図ｂと、ｂ図の矢視部分
の断面図ｃである。符号の説明、１，１２……風洞、１―１……固
定子基部、１―１１，１―１２……取り付け足、
１―１３……通風窓、１―１４……固定子支持部
、２……回転子、２―１……羽根、２―２……回
転子ヨーク、２―３……永久磁石、３……回転軸
、４……軸受、５……固定子巻線、６……固定子
ヨーク、７……通常絶縁物の印刷配線基板、８…
…導体部、９……駆動回路、１０……磁気検出器
、１１……磁性体の小片、１３……鉄製の印刷配
線基板、１３―１，１３―２……固定子の支持足
、１３―３……通風窓、１４……固定子の絶縁支
持部材、１５……軸受ブラケツト。 Fig. 1 is a front view a including a partial cross section showing the structure of an axial flow fan according to the present invention, a cross sectional view b, and Fig. 2 is a front view a including a partial cross section showing the structure of an axial flow fan according to the prior art. , a cross-sectional view b, and a cross-sectional view c of a portion taken in the direction of arrows in figure b. Explanation of symbols, 1, 12...Wind tunnel, 1-1...Stator base, 1-11, 1-12...Mounting foot,
1-13...Ventilation window, 1-14...Stator support section, 2...Rotor, 2-1...Blade, 2-2...Rotor yoke, 2-3...Permanent magnet, 3... ... Rotating shaft, 4 ... Bearing, 5 ... Stator winding, 6 ... Stator yoke, 7 ... Printed wiring board made of normal insulator, 8 ...
...Conductor portion, 9...Drive circuit, 10...Magnetic detector, 11...Small piece of magnetic material, 13...Iron printed wiring board, 13-1, 13-2...Stator support leg, 13 -3... Ventilation window, 14... Stator insulation support member, 15... Bearing bracket.

Claims

[Claims for Utility Model Registration] (1) A wind tunnel having a hollow cylindrical cross section, a plurality of supporting legs installed radially around the inner circumference of the wind tunnel, and fixed to one end surface of the wind tunnel by the supporting legs. It has a bench lily case integrally molded with a stator base made of synthetic resin, and a cup-shaped end of the rotary shaft rotatably supported by a bearing attached to a bracket provided on the stator base. A rotor is fixed to the rotor, a plurality of blades are provided on the outer circumference of the rotor so that the outer circumference maintains an appropriate gap with the inner circumference of the wind tunnel, and a rotor yoke is fixed to the inner circumferential end surface of the rotor. an annular permanent magnet is fixed to the other surface of the rotor yoke, and a stator winding disposed through an axial gap from the permanent magnet, a stator yoke, and the stator yoke. In an axial flow fan having a stator including a printed wiring board equipped with a magnetic detector and a drive circuit whose magnetic flux receiving direction faces the permanent magnet through holes provided in the printed wiring board, An axial flow fan characterized in that a small piece of magnetic material is disposed close to a surface opposite to the magnetic flux receiving direction of a fixed magnetic detector. (2) The axial flow fan according to claim 1, wherein the small piece of magnetic material is integrally molded of resin into the stator base of the bench lily case.