Fan Motor and Electronic Device Comprising the Same

Abstract

A fan motor and an electric device having the same are disposed. The fan motor and the electronic device having the same are provided with: a stator part including a coil and a stator yoke provided at a lower part of the coil; a rotor part including a magnet spaced apart from an upper surface of a stator yoke and a back yoke tightly provided on the upper surface of the magnet; a fan member including a rotating shaft which rotates to become a rotation center of the rotor part, and a plurality of impellers to which the magnet is fixedly coupled on inner circumferential surfaces of the impellers; a body part accommodating the stator part; and a cover part having an intake hole and an exhaust hole, and provided at an upper end part of the body part to accommodate the plurality of impellers.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]The present application claims priority to Korean Patent Application No. 10-2019-0005000, filed Jan. 15, 2019, the entire contents of which is incorporated herein for all purposes by this reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to a fan motor that is applied to a kind of sensor module that detects temperature, humidity, and a dust turbidity state of indoor air of a vehicle, and further controls the operation of an air cleaner of the vehicle. More particularly, the present invention relates to a fan motor and an electronic device having the same, the fan motor including: a stator part including a coil and a stator yoke provided at a lower part of the coil; a rotor part including a magnet spaced apart from an upper surface of the stator yoke and a back yoke tightly provided on the upper surface of the magnet; a fan member including a rotating shaft which rotates to become a rotation cent...

AI Technical Summary

Benefits of technology

The present invention is a fan motor that solves problems of the related art, such as axial deviation of the sleeve bearing and impact-loaded friction joint between the sleeve bearing and the rotating shaft. The fan motor includes a stator part, a rotor part, a fan member, a body part, and a cover part. The stator yoke is seated in a groove part provided in the bottom surface of the body part as a plate-shaped member, and the bearing housing is provided by protruding integrally with the body part in the central part where the groove part is provided. The fan motor also reduces the lengths of the rotating shaft and of the sleeve bearing to match the center of gravity with the fan member, and changes a production method of the bearing support part from the press to the injection molding. The stator yoke is in a polygon shape so that each vertex of the polygon of the stator yoke is coincident with the center point of each of the N pole and the S pole of the magnetized magnet, which determines the starting position of the rotor part, and eliminates the need for a magnet for sensing.

Problems solved by technology

However, the fan motor using such a sleeve bearing has the problems in that the sleeve bearing may be separated or an intermetallic friction joint may occur between the sleeve bearing and the rotating shaft when the motor is driven.

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