A conveyor dishwasher includes at least one wash zone and at least one final rinse zone, wherein the at least one wash zone is designed to spray wash liquid, wherein the wash liquid is, at least proportionally, liquid which has already been used for final rinsing in the at least one final rinse zone and to which a wash chemical is added in a metered manner or is fresh water to which a wash chemical is added in a metered manner, wherein the conveyor dishwasher has a metering pump for adding the wash chemical in a metered manner to the liquid to be sprayed in the at least one wash zone, and wherein a controller is associated with the conveyor dishwasher in order to actuate the metering pump and a wash pump or final rinse pump of the dishwasher.

A method for cleaning items to be cleaned is disclosed. A cleaning device is used that has at least one cleaning chamber and at least one applicator for applying at least one cleaning fluid to the items to be cleaned in the cleaning chamber. A desired hygiene value is prespecified. The method further includes time-resolved recording of at least two influencing variables which influence hygienization of the items to be cleaned. Hygiene share values are determined from the influencing variables using a prespecified relationship between each influencing variable and the respective hygiene value share of said influencing variable. An expected actual hygiene value at the end of the cleaning from the hygiene value shares is ascertained and compared with the desired hygiene value. At least one of the influencing variables is changed based on the comparison. An inventive cleaning device is also disclosed.

The present invention relates to a home appliance, in particular, a dishwasher, a washing machine or the like, and a method for controlling said home appliance. The home appliance comprises a water supply unit including a water supply port, for supplying water, like fresh water or drinking water to the home appliance, a water reservoir for storing water supplied to the home appliance by the water supply unit, a treatment space for treating objects in the home appliance, like dishes or laundry, at least one pump unit for circulating water inside the treatment space and for discharging water from the treatment space and a control unit for controlling the operation of the home appliance. In the inventive home appliance, a heat exchanger is arranged between the water supply unit and the water reservoir, for exchanging heat between the water supplied to the reservoir and the water discharged from the treatment space by the at least one pump unit.

A dishwashing appliance may include a cabinet, a tub, a sump, and a filter assembly. The tub may be positioned within the cabinet and define a wash chamber for receipt of articles for washing. The sump may be positioned at a bottom portion of the tub along a vertical direction. The sump may include an internal wall defining a collection chamber. The filter assembly may be at least partially received within the collection chamber. The filter assembly may include a top cap extending above the collection chamber. The top cap may include a fixed indicium calibrated to a predetermined fill volume of the dishwashing appliance.

A dishwasher has a treating chamber for receiving dishes for treatment according to an automatic cycle of operation and a dispensing system for storing and dispensing a treating chemistry to the treating chamber during the cycle of operation. The dishwasher may dispense a treating chemistry when a temperature of a liquid in the treating chamber satisfies a predetermined temperature threshold. The temperature of the liquid may be maintained to satisfy the predetermined temperature threshold for a predetermined period of time based on the treating chemistry.

A method for calibrating a cleaning device that has at least one sensor for detecting at least one state variable, including carrying out a calibration measurement, establishing an electronic connection between the calibration sensor and a controller of the cleaning device, and electronically transmitting the reference value to the controller; and comparing the reference value with at least one measurement value of the sensor of the cleaning device and adjusting at least one correction function in accordance with the comparison. At least one state variable is detected and at least one reference value is determined by means of at least one calibration sensor independently of the sensor of the cleaning device. Future measurement values of the sensor of the cleaning device are automatically corrected using the correction function.

The present disclosure is directed to an apparatus for rinsing and disinfecting utensils, on demand, with a controller operating the components that deliver a pro-determined volume or timed flow of water, and exposure time of sanitizer(s) to the intended objects. The spray embodiment has high performance conical spray nozzle(s) controlled by a controller that reduces water usage and that may vary depending on the viscosity of the material to be eliminated. The recirculating embodiment has a recirculating water system, with a controller operating the components that recirculate water throughout the system until the turbidity exceeds a chosen threshold, and displace with fresh water until the turbidity returns to a lower threshold. The water resumes recirculation until it again exceeds the chose turbidity threshold and the water in the system is again displaced by fresh water. Both spray and recirculating embodiments can contain multiple rinse stations.

A dishwasher appliance includes a circulation pump, a pressure sensor upstream of the circulation pump, and a diverter downstream of the circulation pump. A method of circulating fluid includes operating the circulation pump at a first speed less than a target speed for a first amount of time. The method also includes determining a first minimum pressure value based on the first speed and a position of the diverter and monitoring a pressure upstream of the circulation pump with the pressure sensor. The method further includes operating the circulation pump at a second speed greater than the first speed when the monitored pressure continuously exceeds the first minimum pressure value for a second amount of time and determining a second minimum pressure value based on the second speed and the position of the diverter after operating the circulation pump at the second speed for a third amount of time.

A dishwasher appliance that includes features for prevention and detection of flood events and leaks without sacrificing performance or efficiency of the dishwasher appliance is provided. Moreover, methods for detecting and preventing such flood events and leaks are also provided.

A dishwashing appliance, including methods of operation, is provided. The dishwashing appliance may define a vertical direction and include a tub, a base conductivity sensor mounted at a first level within the tub, and an elevated conductivity sensor mounted at a second level within the tub, the second level being higher along the vertical direction than the first level.