Patent ID: 7392813

Claim:
A washing device comprising: a main flow conduit that is vertically disposed in an operating position of the washing device; and an apparatus for preventing foam or air bubbles from accumulating in a measuring zone of a turbidity sensor connected in a wash-water circuit of the washing device, the apparatus comprising a bypass conduit connected to the main flow conduit, the bypass conduit including: a first conduit section branching off from the main flow conduit at a branching off location; a second conduit section leading back into the main flow conduit at a junction vertically above the branching off location; and an enlarged region of reduced flow velocity connected between the first and second conduit sections and providing the measuring zone of the turbidity sensor, the enlarged region including an abrupt enlargement and an abrupt narrowing of the bypass conduit forming a curved baffle and a downward-facing bulbous protuberance opposite the baffle so as to form a backflow region, the measuring zone being disposed in the backflow region in the bulbous protuberance.