Filter cleaning device for an air conditioner and air conditioner having such filter cleaning device

A filter cleaning device for an air conditioner, comprising:

• a casing;
• a filter that is disposed in the casing and through which air flow passes, the filter having a filter surface;
• a cleaning brush that is contactable with the filter surface and removes particulate matter from the filter surface;
• a dust box that:
• is movable along the filter surface,
• receives the particulate matter,
• accommodates the cleaning brush, and
• has a first opening and a second opening, wherein the first opening is configured to allow the cleaning brush to protrude to contact the filter surface;
• a suction tool that comprises an outlet that communicates with the dust box, wherein the suction tool applies a suction force through the second opening to the dust box to remove the particulate matter from the dust box;
• and
• a lid that is fixed to the casing and movable between a first position and a second position, and that closes the first opening in the second position when the suction force is applied.