JPH0325894U

JPH0325894U -

Info

Publication number: JPH0325894U
Application number: JP8583189U
Authority: JP
Priority date: 1989-07-21
Filing date: 1989-07-21
Publication date: 1991-03-18

Description

[Brief explanation of the drawing]

第１図乃至第５図は本考案による軸流送風機の
実施例で、第１図は背面図、第２図は第１図のＡ
−Ａ断面図、第３図はプリント基板の平面概要図
、第４図と第５図は別の実施例によるプリント基
板の要部平面図である。同図中、１……外枠、２……通風路、３……支
持体、４……ベース板、５……軸受部、６……固
定子、７……電機子、７ａ……電機子コイル、８
……プリント基板、８ａ……スイツチング素子、
８ｂ……回転子位置検出器、９……突設部、９ａ
……開口、１０……回転子、１１……永久磁石、
１２……ヨーク、１３……回転軸、１４……羽根
車、１４ａ……羽根、１５……温度検出手段、１
５ａ……サーミスタ、１６……電圧制御手段であ
る。 Figures 1 to 5 show examples of the axial blower according to the present invention, with Figure 1 being a rear view and Figure 2 being A of Figure 1.
-A sectional view, FIG. 3 is a schematic plan view of a printed circuit board, and FIGS. 4 and 5 are plan views of main parts of a printed circuit board according to another embodiment. In the figure, 1...outer frame, 2...ventilation path, 3...support body, 4...base plate, 5...bearing section, 6...stator, 7...armature, 7a...electric machine Child coil, 8
...Printed circuit board, 8a...Switching element,
8b...Rotor position detector, 9...Protrusion part, 9a
...Aperture, 10...Rotor, 11...Permanent magnet,
12... Yoke, 13... Rotating shaft, 14... Impeller, 14a... Blade, 15... Temperature detection means, 1
5a... thermistor, 16... voltage control means.

Claims

[Scope of Claim for Utility Model Registration] (1) A base plate is provided via a support at approximately the center of the ventilation passage formed by the outer frame, and a bearing portion is erected on the base plate, and is concentric with the bearing portion. A stator consisting of an armature having an armature coil, a drive circuit including a switching element for controlling energization of the coil, and a printed circuit board having a rotor position detector is attached to the yoke, and a yoke is equipped with a permanent magnet. In an axial flow blower, an impeller is integrally attached to a rotor with a rotating shaft set upright, the rotating shaft is inserted into a bearing part, and a permanent magnet is opposed to an armature. In addition to being equipped with a detection means and a voltage control means, a part of the printed circuit board is provided with a protrusion extending into the ventilation passage, and a temperature sensing element of the temperature detection means is attached to the protrusion. Axial flow blower. (2) The axial blower according to claim (1), wherein the temperature sensing element is disposed outward from the periphery of the protrusion. (3) The axial flow blower according to claim (1), wherein the temperature sensing element is disposed facing an opening provided in the protrusion. (4) The axial flow blower according to any one of claims (1) to (3), wherein the temperature sensing element is a thermistor. (5) Claims (1) to (4) characterized in that the voltage control means supplies two or more different voltages to the drive circuit in response to two or more different signals from the temperature detection means. Axial blower as described.