A dishwasher appliance includes a sump, a water supply valve for providing a flow of water into the sump, and a circulation pump that circulates water that is collected in the sump to one or more spray arm assemblies. A pressure sensor is operably coupled to the sump for monitoring sump pressure and wash fluid level. A controller regulates the water supply valve to provide the flow of water into the sump and monitors the sump pressure during the fill process. The controller further determines that the circulation pump is primed when the rate of increase of the sump pressure exceeds the predetermined threshold rate and stops further filling of the sump.

A dishwasher appliance includes a sump that defines a transition fill level where the cross sectional area of the sump increases. A pressure sensor is operably coupled to the sump for monitoring sump pressure and wash fluid level. A controller calibrates the pressure sensor by monitoring a sump pressure and determining when the wash fluid has reached the transition fill level. A measured transition pressure is taken at this point and compared to a target transition pressure that is known based on the sump geometry. A slope correction factor is calculated based on the measured transition pressure and the target transition pressure to obtain improved pressure readings and wash fluid level measurements.

A system for ascertaining fresh water consumption by an, in particular, commercial dishwasher (1) or a component thereof. The system includes a container (12, 22) for temporarily storing liquids, wherein the container (12, 22) has a liquid inlet (25), which can be flow-connected to a fresh water source if required, and a liquid outlet (23), which can be flow-connected to a freshwater consuming means, in particular a freshwater consuming means of the dishwasher (1), if required. The system further includes at least one pressure sensor (B3, B4) for detecting an, in particular, hydrostatic pressure in the container (12, 22), and an evaluation device which is designed to ascertain a fresh water volume flow into the container (12, 22) depending on at least one output value of the at least one pressure sensor (B3, B4).

A box-type dishwasher (1), wherein the dishwasher (1) has a fresh-water connection (20) with a feed valve (21), wherein a water-treatment system with a reverse-osmosis device (22) is provided downstream of the feed valve (21) in order to treat, in particular as required, as least some of the fresh water fed to the dishwasher (1) via the fresh-water connection (20), wherein a backflow preventer (6) is provided between the feed valve (21) and the reverse-osmosis device (22) in order to prevent water from flowing back from the dishwasher (1) into a fresh-water-supply installation (100) which is, or can be, flow-connected to the fresh-water connection (20).

A device for customizing a washing program for removing soiling from items being washed in a water-conducting household appliance includes a sensor configured to acquire spectral measurement values of organic compounds in washing water in the water-conducting household appliance. A determination unit determines functional groups of the organic compounds based on the acquired spectral measurement values of the organic compounds, and a customization unit customizes washing parameters of a current washing program based on the determined functional groups.

A water dispensing device for a washing appliance has a body and a lid defining an internal cavity and, within the internal cavity, a flow conduit for water from an inlet to an outlet. On the flow conduit an air-break is provided. One or more non-return valves are arranged on the flow conduit within the internal cavity and upstream of the air-break.

Systems and methods are described, which relate to the control of additive dispensers to provide defined amounts of one or more additive compounds to water to produce customized water. A given additive dispenser may include multiple inputs and/or outputs. Predefined water profiles may be stored in memory. A given water profile may define the amounts of additives to be delivered by the additive dispensers to achieve desired water characteristics. A controller may determine actual water characteristics of input water based on corresponding sensor data, and may compare the actual water characteristics to desired water characteristics in order to determine the amount of additive or additives that should be delivered to the input water to achieve the desired water characteristics. The additive dispensers may be network-enabled and may include transceivers configured to receive instructions related to production of customized water from a user device.

A dishwasher may include a washing chamber including a sump. The dishwasher may further include a water inlet tank configured to accommodate water for use in a wash cycle in the washing chamber, a water inlet conduit configured to supply water to the water inlet tank, and a drain pump including an inlet and an outlet, wherein the inlet is fluidly connected to the sump. The dishwasher may include a drain conduit fluidly connected to the outlet of the drain pump and a heat exchanger configured to exchange heat between the drain conduit and the water inlet conduit.

Provided are systems, methods, and apparatus for spraying water in a dishwasher. A dishwasher may include a wash chamber and at least one dish rack. The dishwasher may include a water inlet selectively connected to a dish spray device, which may connect a dish spray conduit with the wash chamber. The dish spray device may be oriented towards the at least one dish rack, such that the spray device may be configured to direct water onto the dishes for washing. The water inlet may be selectively connected to a fill device, which may connect the fill conduit with the wash chamber. The fill device may be configured to provide water to the circulation assembly without impinging the at least one dish rack. The one or more valves may selectively direct water from the water inlet to one or both of the dish spray device and the fill device.

A dishwasher includes a dishwasher interior for washing items to be washed with washing liquor. Arranged at a lower end of the dishwasher interior is a pump sump for collecting the washing liquor, and a sensor is arranged in the pump sump for outputting a sensor signal as a function of a presence of washing liquor at the sensor. A control apparatus configured to carry out a washing program selected from a number of washing programs is designed to determine a malfunction of a component of a hydraulic assembly as a function of the sensor signal and of a current operating state of the dishwasher.