Drainage device of air conditioner

The utility model provides a drainage device of an air conditioner, which belongs to the technical field of drainage devices and comprises a first water pipe, a second water pipe is movably mounted on the outer wall of the first water pipe, and a support disc is mounted on the inner wall of the first water pipe. The empty shell is installed at the inner bottom of the second water pipe, water drainage holes are formed in the outer wall of the empty shell, and the second water pipe continuously increases in weight and moves downwards, so that the empty shell descends along with the second water pipe; the supporting assembly is arranged in the center of the supporting disc, a disc is installed on the outer wall of the supporting assembly, and the empty shell descends relative to the disc; and the limiting assembly is arranged on the empty shell, and when the water drainage hole is opened, the limiting assembly can limit the disc, so that the disc descends to block the water drainage hole, the situation that exte