Patent ID: 9587387
Date: 2017-03-07
CPC Classifications: E03D

Claim:
1. Dual-drainage switching mechanism of water tank, comprising: a water tank, a water container arranged in the water tank, the water container having an inner cavity with a bottom opening, an air vent communicating with the inner cavity arranged on a sealed top of the water container, a valve unit used for controlling opening and closing of the air vent, and a drain valve controller comprising a partial flush button and a full flush button, wherein: water flows into the water container and is discharged from the water container via a drain valve base under action of an atmosphere and a weight of the water, the air vent is opened through linking and coupling of the full flush button and the valve unit to communicate between the inner cavity of the water container and the atmosphere, when fully flushing the water tank, and the air vent is closed through linking and coupling of the partial flush button and the valve unit to keep the inner cavity of the water container sealed from the atmosphere to prevent water from flowing out of the inner cavity, when partially flushing the water tank.