Patent ID: 7819986

Claim:
A dish washing machine, comprising: a tub to wash dishes therein; a sump installed in a lower side of the tub to separate dirt from the dishes; a water supplying unit to supply water to the tub; and a level detecting unit fluidly connected with the sump to detect a level of water in the tub, to prevent the water from being supplied to the tub over a predetermined level, wherein the water supplying unit comprises: an introducing hole to introduce the water into the water supplying unit, a discharging hole to supply the water to the tub, a first guide passage to guide the water to the discharging hole such that a portion of the water introduced to the water supplying unit is supplied to the discharging hole through the first guide passage, a second guide passage to guide the water to the level detecting unit such that a portion of the water introduced to the water supplying unit is supplied to the level detecting unit through the second guide passage, a buffering space disposed between the second guide passage and the level detecting unit to allow the water to flow without sudden change of a flow rate and a pressure to the level detecting unit, and a connecting hole of a predetermined size through which water from the buffering space is discharged at a predetermined flow rate to the level detecting unit, wherein the buffering space of the water supplying unit is positioned over the level detecting unit such that the water supplied to the buffering space flows through the connecting hole to the level detecting unit by gravity.