A dishwasher includes a tub at least partially defining a treating chamber, a rotatable spray arm comprising an outlet, and a liquid supply conduit fluidly coupled to the spray arm. A pump can be fluidly coupled to the liquid supply conduit and operated to flow liquid through an aperture in the liquid supply conduit and through the outlet in the rotatable spray arm.

Disclosed a control method of a dishwasher comprising a main-washing cycle for washing one or more washing objects which are held in a tub; a rinsing cycle for rinsing the washing objects washed in the main-washing cycle by injecting wash water; a normal drying cycle for drying the washing objects rinsed in the rinsing cycle, wherein the main-washing cycle comprises a pre-steam water supply step for supplying steam water to a sump so as to supply steam to the tub; a pre-steam supply step for generating steam by heating a heater and supplying the steam to the tub; a main-wash water supply step for supplying wash water for washing to the sump, without draining the steam water supplied to the sump; a main-washing step for washing the washing objects by circulating the supplied wash water; and a main-wash water drainage step for draining the wash water.

Disclosed a control method of a dishwasher comprising a main-washing cycle for washing one or more washing objects which are held in a tub; a rinsing cycle for rinsing the washing objects washed in the main-washing cycle by injecting wash water; a normal drying cycle for drying the washing objects rinsed in the rinsing cycle, wherein the main-washing cycle comprises a pre-steam water supply step for supplying steam water to a sump so as to supply steam to the tub; a pre-steam supply step for generating steam by heating a heater and supplying the steam to the tub; a main-wash water supply step for supplying wash water for washing to the sump, without draining the steam water supplied to the sump; a main-washing step for washing the washing objects by circulating the supplied wash water; and a main-wash water drainage step for draining the wash water.

Disclosed a controlling method of a dishwasher comprising a water supply step for supplying wash water, a preliminary washing step for injecting the wash water to one or more dishes, a main washing step for injecting the wash water mixed with washing liquid to the dishes, a rinsing step for injecting the wash water to the dishes, and a heating step for heating the wash water in one or more of the preliminary washing step, the main washing step and he rinsing step, wherein a heater sensing step for determining an operational state of a heater heating the wash water is performed in the heating step in a state where the circulation of wash water is stopped.

Disclosed a controlling method of a dishwasher comprising a washing tub defining a washing space in which one or more dishes are loaded and washed; a storage unit in which the dishes are loaded; an injection unit injecting wash water to the dishes; a sump provided in a lower portion of the washing tub; and a driving unit supplying and circulating the wash water stored in the sump to the injection unit, the controlling method for cleaning the washing space comprising: a water supply step for supplying wash water; a preliminary cleaning step for injecting the wash water to the storage unit without the dishes, the washing tub and the injection unit to clean the storage unit, the washing tub and the injection unit; a main cleaning step for injecting the wash water mixed with dishwashing detergent to the storage unit, the washing tub and the injection unit; a rinsing step for rinsing the storage unit, the washing tub and the injecting unit by injecting wash water; and a drying step for drying the storage unit, the washing tub and the injection unit.

A method for reducing energy consumption by a medium heating device, the method comprising the step: scheduling an operation (501) of the first device (111) requiring heating of a first medium; scheduling an operation (502) of the second device (112) requiring heating of a second medium; the method being characterized in that it further comprises the steps of: sending (504), from the first device (111), information regarding its operation cycles and water parameters to the second device (112); rescheduling (505) operations of the liaised devices (111, 112) so that drain heat of the first medium is reused to heat a fresh intake of the second medium by the second device by means of a heat exchanger (160); instructing (506), the reprogrammed devices (111, 112) to start their operations according to the new schedule.

A washing appliance is provided, including: a tub configured to house items to be washed; an inlet valve operable to be selectively switched between an open condition for causing washing fluid to be loaded into the tub and a closed condition for preventing washing fluid be fed to the appliance; a circulation pump configured to circulate the washing fluid in the tub during a washing cycle; a control unit configured to determine an operative state of the circulation pump between a saturation state indicative that sufficient washing fluid is present in the tub to prevent air from being drawn out by the circulation pump, and a starvation state indicative that insufficient washing fluid is present in the tub to prevent air from being drawn out by the circulation pump. The control unit is further configured to receive an indication of a target speed for the circulation pump (130) and accordingly control the circulation pump by: causing a speed of the circulation pump to increase towards the target speed with a first speed increase rate; if the following two conditions a) and b) are both true: a) a starvation state of the circulation pump is determined before the speed of the circulation pump reached the target speed, and b) the inlet valve is in the open condition, causing the speed of the circulation pump to increase towards the target speed with a second speed increase rate lower than the first speed increase rate.

A dishwasher includes an independent presoak system which may be activated by a user of the dishwasher. The dishwasher presoak system utilizes a storage tank, supply tubes, and set of nozzles which are independent from components used in a washing cycle such that a presoak detergent is applied to items placed within a washing compartment of the dishwasher without being diluted by a standard wash cycle. As part of the presoak system, the dishwasher features a detection system which allows the user to select an automatic presoak operating state whereby the dishwasher utilizes a sensor to determine if items placed into the washing compartment are sufficiently dirty to need a presoak cycle prior to a washing cycle. The dishwasher further relies on a control system to analyze samples taken of the dirtiness levels of items placed within the washing compartment and determine whether a presoak option is necessary or suggested.

A method of operating a dishwasher by controlling the use of hot liquids to dissolve fatty soils.

Systems, methods, and apparatuses for guiding a user through an interaction with a dishwasher user interface are provided. For example, in one embodiment a method for operating a dishwasher, wherein the dishwasher comprises a tub for receiving dishware, a door configured to enclose the tub, and a user interface comprising one or more control elements, is provided. The method comprises receiving, by the user interface, user selection of at least one of the control elements. In response to receiving the user selection of at least one of the one or more control elements, a controller initiates one or more close door indicators and a countdown timer. The method further comprises determining if the door is closed before a time period of the countdown timer expired. In response to determining that the door was closed before the time period of the countdown timer expired, a wash cycle is started or resumed.