EP 0842632 A2 19980520 - Automatic purge filtration system for a dishwasher
Title (en)
Automatic purge filtration system for a dishwasher
Title (de)
Filtereinrichtung mit automatischer Reinigungsvorrichtung für Geschirrspülmaschine
Title (fr)
Système de filtration à purge automatique pour machine à laver la vaisselle
Publication
Application
Priority
US 3118296 P 19961119
Abstract (en)
A dishwasher pump and automatic purge system which includes a wash impeller supported for rotation within a pump chamber wherein the pump chamber has a main outlet and a sample outlet port. Wash liquid pumped out through the main outlet is recirculated throughout the dishwasher interior wash chamber. A soil collector receives wash liquid through the sample outlet port. The soil collector includes a filter screen for returning filtered wash liquid back into the sump such that soils are retained in the soil collector. Pressure within the soil collector is sensed by a pressure sensor. The soil collector is purged by a drain pump when the pressure within the soil accumulator exceeds a predetermined limit level such that soils are cleared from the collector and the filter screen. When the pressure within the soil accumulator is reduced to below the predetermined limit level, the drain pump is deenergized. A control valve is provided for preventing fluid flow from the dishwasher sump to the drain pump during the purge operation while the wash pump is operating. The control valve is operated in response to fluid pressure created by the wash impeller. <IMAGE>
IPC 1-7
IPC 8 full level
A47L 15/42 (2006.01)
CPC (source: EP)
A47L 15/4204 (2013.01); A47L 15/4225 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0842632 A2 19980520; EP 0842632 A3 19990203; EP 0842632 B1 20060208; DE 69735228 D1 20060420; DE 69735228 T2 20061026
DOCDB simple family (application)
EP 97309235 A 19971117; DE 69735228 T 19971117