ELECTRIC BLOWER

Disclosed herein is an electric blower including: an impeller; a driving module including a rotor part coupled to the impeller in order to driving the impeller and a stator part, the rotator part including a magnet and the stator part including an armature formed of a core positioned so as to face the magnet and a coil; a motor housing having the driving module mounted thereon; and a control module mounted on the motor housing and controlling the driving module.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The objects, features and advantages of the present invention will be more clearly understood from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same reference numerals are used to designate the same or similar components, and redundant descriptions thereof are omitted. Further, in the following description, the terms “first”, “second”, “one side”, “the other side” and the like are used to differentiate a certain component from other components, but the configuration of such components should not be construed to be limited by the terms. Further, in the description of the present invention, when it is determined that the detailed description of the related art would obscure the gist of the present invention, the description thereof will be omitted.

FIG. 1is a front view schematically showing an electric blower of preferred embodiment of the present invention,FIG. 2is a schematic perspective cross-sectional view of the electric blower shown inFIG. 1, andFIG. 3is a schematic cross-sectional view of the electric blower shown inFIG. 1. More specifically, the electric blower100is integrally formed with a control module.

As shown, the electric blower100includes an impeller110, a driving module120, an impeller cover130, a motor housing140, and a control module150.

More specifically, the impeller110is connected to the driving module120and is rotated by the driving module so as to make air flow.

In addition, the impeller110is covered by the impeller cover130.

Further, the driving module120is coupled to the motor housing140and the motor housing140is coupled to the impeller cover130.

In addition, the control module150is to control the driving module120and is mounted on the motor housing140.

Hereinafter, characteristics of the respective components and systematic coupling therebetween will be described in detail.

As described above, the impeller110is connected to the driving module120and is in communication with a rotation of a rotor part of the driving module so as to make the air flow. In addition, to this end, a wing111is formed so as to make the air flow.

In addition, the impeller cover130is provided with a suction hole for introducing air and is formed in a cylindrical shape.

In addition, the impeller cover130and a motor housing140may be coupled using various methods such as a bonding coupling, a press-fitting coupling, a screw coupling, or the like andFIGS. 1 to 3, which are an embodiment for each of the above-mention coupling methods show the coupling by a clamp screw160.

Next, the driving module120is formed of a stator part including an armature124and a shaft121and a rotor part including a sleeve122and a magnet123, the rotor part is connected to the impeller110, and the stator part is mounted on the motor housing140.

In addition, an outer diameter portion of the shaft121and an inner diameter portion of the sleeve122have a fine interval therebetween and the fine interval may be provided with a bearing part. Although the present invention employs an air bearing part as an example, the present invention is not limited thereto, but may be variously implemented.

In addition, facing surfaces of the sleeve and the shaft are mounted with magnets125aand125bfor magnetic bearing, respectively.

More specifically, in the rotor part, the sleeve122is rotatably supported by the shaft121and is coupled to the impeller110.

The sleeve122may have a radial dynamic generating groove (not shown) formed in the inner diameter portion thereof so that the air bearing part is formed in the fine interval between the sleeve122and the shaft121.

In addition, the sleeve122has a magnet123mounted on the outer peripheral surface thereof so as to face the armature124of the stator part.

In addition, the driving module according to the preferred embodiment of the present invention further includes a magnetic bearing part in addition to the air bearing part. To this end, the driving module has the shaft and sleeve mounted with the magnets125aand125bfor magnetic bearing, respectively.

That is, the magnet125afor magnetic bearing coupled to the sleeve is mounted so as to face the magnet125bfor magnetic bearing of the shaft121. In addition, the magnet125afor magnetic bearing may be formed in an annular ring shape.

Next, in the stator part, the shaft121rotatably supports the sleeve122, as described above. In addition, an upper end portion of the shaft121faces the impeller110and a lower end portion thereof is fixedly coupled to the motor housing140.

In addition, the shaft121is mounted with the magnet125bfor magnetic bearing so as to face the magnet125afor magnetic bearing of the sleeve.

As described above, the dynamic pressure design may be more precisely performed by the magnet125aand125bfor magnetic bearing mounted on each of the sleeve122and the shaft121in addition to the air bearing.

In addition, the shaft121may be mounted with a ball126for a point contact in order to decrease friction with the impeller110at the time of an initial driving. In addition, the shaft121is provided with a ball receiving groove for receiving the ball. In addition, the ball receiving groove may be formed at a central portion of an upper end surface of the shaft.

In addition, the impeller110may be mounted with a plate112so as to face the ball126as shown inFIGS. 2 and 3.

In addition, the shaft121may have a radial dynamic pressure groove formed on an outer peripheral surface thereof so as to form the air bearing part. As described above, the dynamic pressure groove may be selectively formed on the outer peripheral surface of the shaft facing the sleeve or the inner peripheral surface facing the shaft. In addition, the dynamic pressure generating groove has shapes and sizes variously implemented by a herringbone and the like according to the dynamic design.

Next, the armature is formed of a coil (not shown) and a core124and is fixedly coupled to the motor housing so as to face the magnet123.

In addition, the control module150is to control the driving of the driving module and includes a control substrate151and a hall sensor152connected to the control substrate151. In addition, the hall sensor152is to sense a position and displacement of the rotor part of the driving module and is positioned so as to face the rotor part, whereinFIGS. 2 and 3show an embodiment in which the hall sensor faces the magnet123. In addition, the control substrate151is mounted on the motor housing140, whereinFIGS. 2 and 3show a case in which the control substrate151and the motor housing140are coupled by the clamp screw160, as an embodiment.

As described above, according to the embodiment of the present invention, it is possible to implement the electric blower100which is miniaturized and lightened, and is driven at a high speed by the air bearing.

According to the preferred embodiment of the present invention, it is possible to obtain an electric blower capable of implementing miniaturization and lightening thereof by integrally forming a control module controlling a driving module of the electric blower with a motor housing and in which an impeller is rotated so as to minimize friction as a plate of the impeller contacts a ball of the driving module at the time of an initial driving, that is, before floating the impeller and in which the impeller is rotated in a state in which the friction is minimized according to a dynamic pressure design by an air bearing to thereby be driven at an ultra-high speed, whereby it is possible to implement an ultra-small size and ultra-small weight of the electric blower.