WASHER Russian patent published in 2013 - IPC D06F33/00 

FIELD: engines and pumps.

SUBSTANCE: proposed device comprises tank 2, laundry container 7, drain tube 3 communicated with tank 2, water discharge pump 6 communicated with drain tube 3, and means 4 to define cleaning fluid column free surface level. Washer comprises water discharge control means 5 connected with aforesaid means 4 that defines first state whereat water level is lower than first preset level or equals it. In, at least, part of washing cycle with operating water discharge pump 6, control means 5 switches off said pump after means 4 pinpoints origination of said first state. Means 4 comprises pressure gage 19 continuously measuring cleaning fluid column free surface level. In case second state originates, control means 5 triggers water discharge pump 6. Here, cleaning fluid column free surface level rises. In second state, cleaning fluid column free surface level exceeds that second preset level or equals it. Note here that second preset level exceeds first preset level and is lower than any other level. Fluid that fills partially laundry container 7 is should be drained.

EFFECT: reduced noise.

9 cl, 1 dwg