Laundry dryer

A laundry dryer comprising:

• a cabinet defining an outer body of the laundry dryer;
• a drum that is rotatably disposed inside the cabinet and that is configured to receive hot air and steam;
• a steam unit that is disposed inside the cabinet and that is configured to generate the steam;
• a storage tank that is configured to detachably couple to an inside of the cabinet and that is configured to receive water to be supplied to the steam unit;
• a tank housing that is disposed inside the cabinet and that is configured to accommodate the storage tank;
• and
• a floater that is placed inside the storage tank and that is configured to move in a vertical direction according to a volume of water in the storage tank,
• wherein the floater includes a body portion having (i) a first outer surface and a second outer surface that are parallel to each other and are spaced apart at a first interval, (ii) a third outer surface and a fourth outer surface that are parallel to each other and are spaced apart at a second interval, and (iii) a fifth outer surface and a sixth outer surface that are parallel to each other and are spaced apart at a third interval,
• wherein the first outer surface defines an upper surface of the floater in the vertical direction and the second outer surface defines a lower surface of the floater in the vertical direction, and
• wherein the first interval is less than the second interval or the third interval.