Patent ID: 7726324

Claim:
A dishwasher comprising: a sump housing for holding washing water; a washing water pumping unit for pumping the washing water; a drain chamber for receiving the washing water pumped by the washing water pumping unit and for depositing particles contained in the washing water by gravity of the particles; a soil chamber, positioned above the drain chamber, for receiving the washing water after the washing water has passed through the drain chamber; a guide assembly for guiding the washing water pumped by the washing water pumping unit to be provided to the soil chamber via the drain chamber; and a sump cover covered on an upper surface of the sump housing for filtering the washing water overflowed from the soil chamber; wherein the guide assembly includes: a sampling flow passage for guiding a portion of the pumped washing water to the drain chamber, and a plurality of main flow passages for guiding the washing water not provided to the sampling flow passage to at least one spray arm.