There is provided a robot cleaner having an improved dust-collecting capability and an improved suction force and capable of being manufactured in a small size. The robot cleaner includes a main body comprising a fan motor and having a suction port provided in one side thereof; a plurality of cyclone units configured to separate foreign substances in air suctioned through the suction port; and a plurality of suction flow paths connecting the plurality of cyclone units and the suction port.

A vacuum cleaner including a cleaner body; and a dust collector provided in the cleaner body, wherein the dust collector includes an outer case forming a side appearance of the dust collector; a first cyclone provided within an outer case to filter dust and foreign matter from air introduced into the dust collector; a second cyclone accommodated within the first cyclone to separate fine dust from the air introduced into the first cyclone; and an upper cover mounted on a top of the outer case to cover the first and second cyclones and having an intake guide configured to introduce air into the outer case and an exhaust guide configured to discharge air from which fine dust is separated by the second cyclone.

A vacuum cleaner, including a cleaner body; and a dust collector provided in the cleaner body, wherein the dust collector includes a first cyclone provided within an outer case to filter foreign matter and dust from air introduced into the dust collector; a second cyclone accommodated within the first cyclone to separate fine dust from the air introduced into the first cyclone; and a rotatable shell provided at a lower side of the first cyclone so as to define a first storage section configured to collect foreign matter and dust filtered by the first cyclone between the rotatable shell and the outer case, and wherein the rotatable shell includes a skirt that extends downward and outward from an upper portion of the rotatable shell.

A vacuum cleaner including a cleaner body; and a dust collector provided in the cleaner body, wherein the dust collector includes a first cyclone provided within an outer case to filter foreign matter and dust from air introduced into the dust collector; a second cyclone accommodated within the first cyclone to separate fine dust from the air introduced into the first cyclone; and a rotatable shell provided at a lower side of and surrounding the first cyclone so as to define a first storage section configured to collect foreign matter and dust filtered by the first cyclone between the rotatable shell and the outer case, wherein the rotatable shell includes a skirt having a plurality of steps arranged along a circumference of the rotatable shell.

A vacuum cleaner, including a cleaner body; and a dust collector provided in the cleaner body, wherein the dust collector includes a first cyclone provided within an outer case to filter foreign matter and dust from air introduced into the dust collector; a second cyclone accommodated within the first cyclone to separate fine dust from the air introduced into the first cyclone; and a rotatable shell provided at a lower side of the first cyclone so as to define a first storage section configured to collect foreign matter and dust filtered by the first cyclone between the rotatable shell and the outer case, and wherein the rotatable shell includes a roller facing a lower cover that covers a lower opening of the outer case, the other configured to contact the foreign matter and dust collected in the first storage section during the rotation of the rotatable shell.

A vacuum cleaner, including a cleaner body; and a dust collector provided in the cleaner body, wherein the dust collector includes a first cyclone provided within an outer case to filter foreign matter and dust from air introduced into the dust collector; a second cyclone accommodated within the first cyclone to separate fine dust from the air introduced into the first cyclone; a screw provided at a lower side of and surrounding the first cyclone, and having at least one vane spirally extended along a flow direction of the air introduced into the outer case to induce the inflow of foreign matter and dust filtered by the first cyclone into a first storage section.

A vacuum cleaner, including a cleaner body; and a dust collector provided in the cleaner body, wherein the dust collector includes a first cyclone provided within an outer case to filter foreign matter and dust from air introduced into the dust collector; a second cyclone accommodated within the first cyclone to separate fine dust from the air introduced into the first cyclone; and a screw surrounding part of the first cyclone, and configured to be rotatable in at least one direction with respect to the first cyclone, wherein the screw includes a pillar that spans a height of the mesh filter; and a scraper provided on an inner surface of the pillar facing an outer surface of the mesh filter, and configured to sweep off dust and foreign matter accumulated on the mesh filter during the rotation of the screw.

A cleaner includes: a suction unit that guides dust and air; a main body that includes a dust separation unit for separating dust from air guided through the suction unit; a main body terminal mounted on the main body; a handle unit that is slide-coupled to the main body; and a handle terminal mounted on the handle unit and is connected to the main body terminal when the handle unit is slide-coupled to the main body.

A cleaning appliance comprises a first housing having a hollow cylinder shape; a second housing fixed to a circumferential surface of the first housing; a third housing provided on a circumferential surface of the first housing and having an exhaust hole; a first communication hole between the first and second housings; a fan for moving air from the second communication hole to the exhaust hole; a particle separator for separating particles from the air by centrifugal force; a battery housing protruded from a rear surface of the first housing, wherein the center of gravity of the fan is located between the center of gravity of the particle separator and the center of gravity of the battery, and a rotary shaft for the fan is parallel with a straight line passing through the center of gravity of the particle separator along a longitudinal direction of the first housing.

A dust collector comprises: a first container, a vacuum motor, a first-flow guiding unit, and a second flow-guiding unit; wherein the first container is set with a first tube-body, and the vacuum motor is set on a cover-body; wherein the motor is set with a filter, wherein the first flow-guiding unit and the second flow-guiding unit are respectively detachably combined with a second container and a third container; wherein the second flow-guiding unit is located in the first flow-guiding unit, and the first tube-body sucks in air, so that the dust and debris in the air enter the first container; wherein the air sequentially passes through the first flow-guiding unit and the second flow-guiding unit to form a vortex to make the fine dust fell into the second container and the third container; and the air is finally discharged by the vacuum motor after passes through the filter.