Filtering device for vacuum cleaner

Abstract

A filtering device for a vacuum cleaner comprises: a casing having a collecting space therein, a suction opening through which air including dust is sucked and a discharge opening through which purified air is discharged; a filter installed at the internal space of the casing, for filtering dust from air sucked through the suction opening; and a filter cleaning unit disposed to encompass an outer circumferential surface of the filter, for cleaning the filter by being rotated by a rotation force of air sucked through the suction opening. Accordingly, the filtering device can remove fine dust attached to the filter in a cleaning operation, thereby preventing a channel of the filter from being closed with the dust.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a vacuum cleaner, and more particularly, to a filtering device for a vacuum cleaner capable of removing dust attached to a filter in operation of a cleaner. [0003] 2. Description of the Background Art [0004] In general, a vacuum cleaner is an electronic device for cleaning an indoor space such as a room, an office or the inside of a car. Undesired impurities such as dust, which exists at home or in a car can be removed by using a suction force of the vacuum cleaner. [0005]FIG. 1 is a perspective view showing a structure of a general vacuum cleaner. [0006] As shown therein, a general vacuum cleaner includes a cleaner main body 1 and a suction head 2 connected to the cleaner main body 1 by a suction hose 3 and an extension pipe 4, to which dust and foreign substances are sucked from a floor. [0007] The cleaner main body 1 includes a suction force generating part (not shown) for generat...

AI Technical Summary

Benefits of technology

[0017] Therefore, an object of the present invention is to provide a filtering device for a vacuum cleaner capable of preventing a channel of a filter from being closed with dust, by self-removing fine dust attached to a filter in a cleaning operation.

Problems solved by technology

However, the above-mentioned conventional vacuum cleaner has disadvantages in that the filter has to be cleaned or replaced periodically.

This is because when the conventional vacuum cleaner is used for a certain period of time, fine dust is attached to the filter of the filtering device, thereby deteriorating a suction force.

That is, since fine dust fills up a close mesh of the filter, it is difficult to discharge air, which is sucked through the suction opening, through the filter, and finally a decrease in suction force is caused.

Accordingly, if the filter is not cleaned or replaced periodically, cleaning cannot be effectively performed due to the deterioration of the suction force.

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