Patent ID: 7856875

Claim:
A water level sensing unit to sense a level of water of a container filled with water comprising: a sensing member having a sensor to generate a sensing signal, the sensing member being installed at a side of the container; and a pivoting member adapted to pivotally rotate about a side thereof having a fixed position on the basis of the level of water, wherein the sensor is adapted to sense positional variation of the pivoting member, to thereby sense a variation of the level of water in the container, wherein the pivoting member comprises: a hinge portion hingedly coupled to the sensing member, an extension extended from one end of the hinge portion, and a float coupled to another end of the hinge portion and adapted to float on a surface of the water, and wherein the hinge portion has a hinge and a pin hole and the sensing member has at least one coupling hole corresponding to the pin hole, whereby the hinge portion is hingedly coupled to the sensing member as the hinge pin is inserted through the pin hole and the coupling hole.