Method for operating a household appliance and household appliance

Abstract

The invention relates to a method for operating a domestic appliance 1 for caring for washing items 6, in which method, in particular during the washing phase 22 of the operating programme, liquid is injected into the lye container 3 of the domestic appliance 1, And during the subsequent pumping out phase 24, the liquid and / or washing lye is pumped out of the lye container 3 via the outflow line 11, wherein, for pumping out the liquid and / or washing lye, the pump 12 follows the main direction 18 runs, and during pumping out, non-return valve 16 moves from outflow line 11 relative to the closed position where lye container 3 is sealed to the open position where outflow line 11 is fluidly coupled with lye container 3, In this case, at least during a predetermined time interval 25, in particular during a washing phase 22, the pump 12 is run in a direction 20 opposite to the main direction 18, so that a pumping pressure 21 is built up at the non-return valve 16, by means of The pumping pressure presses the check valve 16 towards the closed position.

Description

technical field [0001] The invention relates to a method for operating a domestic appliance for the care of washing items, in which method, in particular during the washing phase of an operating programme, liquid, in particular water, is injected into the lye container of the domestic appliance , and during the following pump-out phase, the liquid and / or washing lye is pumped from the lye container via the outflow line, wherein, for pumping out the liquid and / or washing lye, the pump runs in the main direction, and During pumping out, the non-return valve is moved from the closed position into the open position by the pumping. In the closed position of the non-return valve, the outflow line is sealed relative to the lye container; whereas in the open position of the non-return valve, the outflow line is fluidically coupled to the lye container. Furthermore, the invention relates to a domestic appliance for caring for laundry items, which is designed to carry out such a method...

AI Technical Summary

Problems solved by technology

[0005] Although check valves have the advantage over, for example, magnetic valves that they are overall less expensive to construct and are also more cost-effective, the use of check valves is also associated with certain disadvantages: mechanical forces The operation of the washing machine acts on the bottom of the lye container and thus also on the non-return valve itself

In particular, the pressure (or pressure wave) that occurs impulsively when filling the lye container with water for the first time, and the pressure shock produced by the movement of the laundry items inside the laundry drum, can lead to: The return valve briefly moves from the closed position into the open position, causing loss of detergent through the check valve

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