Patent ID: 11865485
Assignee: LG ELECTRONICS INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B  A | IPC A  B

Claim 0:
1. An air cleaner, comprising:
an outer case having an air inlet through which air is suctioned and an air outlet through which air is discharged;
a fan provided inside of the outer case to suction air through the air inlet and to discharge air out of the air outlet;
a filter cartridge including a filter roller and a filter sheet having a plurality of sections wound around the filter roller, each section being configured to be unwound from the filter roller to filter contaminants in the suctioned air such that at least one of the filter sheet or the filter cartridge is replaced when all sections of the filter sheet have been unwound from the roller; and
a filter cutter configured to cut across the filter sheet to remove a corresponding section of the filter sheet,
wherein, when the corresponding section has reached a predetermined contamination level, the filter roller is unwound to expose an adjacent section to the suctioned air and the corresponding section is moved to an outside of the outer case and thereafter separated from the filter sheet,
wherein the filter cutter includes:
a blade configured to cut the filter sheet;
a blade housing coupled to the blade;
a rack extending between first side of the outer case and a second side of the outer case, the rack having a first end closer to the first side of the outer case and a second end closer to the second side of the outer case;
a gear moveable with the blade housing and configured to engage with the rack to move across the rack between the first and second ends of the rack; and
a motor configured to rotate the gear to move the blade housing across the rack, and

wherein, when motor is operated, the blade is moved across the filter sheet to cut the corresponding section from the filter sheet, and the corresponding section of the filter sheets configured to be removed without further unwinding the filter sheet.