An apparatus and a method of washing (or pre-washing) silverware/flatware, or one or more other objects/parts is provided. The apparatus and method utilizes a fluid-push/pull pumping system and method in which generally an entire volume of fluid is pushed or pulled through a cavity of a housing in which the silverware/flatware or other objects/parts are located. The housing is configured to hold a mass of silverware or other item(s) within the cavity. The pumping system, which includes manifolding in fluid communication with the cavity, is configured to pump generally an entire volume of fluid out of the cavity, and to direct the pumped fluid back into the cavity to create a generally continuous flow of generally an entire volume of fluid through the cavity, thereby causing the fluid to flow through the mass of silverware or other item(s).

An auxiliary gray water supply device captures used wash water from a commercial warewashing machine for supply to a pre-rinse station without substantial modification of the commercial warewashing machine. The captured wash water and treatment agent are delivered to a pre-rinse station for pre-rinsing of dishes that will be washed within the commercial warewashing machine.

A dishwasher, in particular a household dishwasher, includes: a washing container having a washing compartment and which receives washing items to be cleaned; and a heat pump device which has an evaporator which is arranged within a tank filled with water. The tank is fluidically connected to the washing container and to a fresh water inlet device. The tank is arranged below the washing container and has a top wall facing a washing container bottom.

A dishwasher and method for operating the same utilize a diverter valve to control via rotation the flow of fluid such as wash fluid or pressurized air to a rotatable conduit supported in the rack of a dishwasher. A valve member may be disposed at a predetermined rotational position about an axis of rotation of the conduit such that a fluid inlet on a rotatable valve body may be rotated to the predetermined rotational position to restrict fluid flow to the conduit.

A conveyor type ware washing machine uses a heat pump to reduce exhaust heat and to heat incoming water. A modulating valve is used to control incoming water flow through a heat exchanger of the heat pump. Processing circuitry automatically dynamically adjusts the modulating valve between a plurality of open states based on the sensed refrigerant head pressure of the heat pump, so that the refrigerant head pressure is maintained in a predefined range. The ware washing machine is efficient, and reduces the amount of heat exhausted to ambient. Related methods are also disclosed.

An on-demand glasswasher comprises a wash tank; a fluid level sensor assembly that includes an ultrasonic sensor assembly positioned within the wash tank; at least one microprocessor connected to the ultrasonic sensor assembly; and a memory device coupled to the at least one microprocessor, the memory device storing processor-executable instructions which, when executed by the at least one microprocessor, configure the microprocessor to receive, from the ultrasonic sensor assembly, ultrasonic signals; and analyze the ultrasonic signals to determine a level of fluid in the wash tank.

A dish washer and a control method are disclosed. The dish washer includes a sump and at least one nozzle configured to inject water. The dish washer also includes a distributor configured to receive water of the sump and distribute the water to the at least one nozzle. The dish washer also includes a reservoir configured to receive and store the water of the sump. The dish washer also includes a circulation path configured to connect the sump and the distributor. The dish washer also includes an inflow path configured to branch off from the circulation path to supply the water of the sump to the reservoir. The dish washer also includes a first valve configured to open or close the inflow path and a second valve configured to open or close the outflow path, and the outflow path is configured to flow the water out of the reservoir.

A dishwashing appliance or variable spray assembly, as provided herein, may include a manifold body, a diverter valve, and a driver. The manifold body may define a fluid inlet, a first flow path, a second flow path, a first spray outlet, and a second spray outlet. The first and second flow paths may be downstream from the fluid inlet. The second flow path may be in fluid parallel to the first flow path. The second spray outlet may be spaced apart from the first spray outlet. The diverter valve may be mounted within manifold body and movable between a first zone position directing wash fluid to the first flow path and a second zone position directing wash fluid to the second flow path. The driver may be disposed outside of the manifold body to motivate the diverter valve between the first zone position and the second zone position.

A water valve bracket for a dishwasher appliance is provided. The dishwasher appliance includes a base rail having a curvilinear cross-sectional shape. The water valve bracket includes a curvilinear flange which is configured to mount on the base rail with the curvilinear flange in contact with the base rail. A curvature of the curvilinear flange of the water valve bracket conforms to the curvilinear cross-sectional shape of the base rail.

A dishwasher includes a case, injection arms, a sump including an injection flow path coupling portion, a washing pump for supplying washing water stored in the sump to the injection arms, and a switching valve including a flow path distributor for distributing washing water to injection arms. The flow path distributor defines distribution holes. When the flow path distributor is in a reference position, the distribution holes are positioned so that all of the injection arm supply holes are opened, and, when the flow path distributor is rotated by a first angle from a reference position, the distribution holes are positioned so that any one of the injection arm supply holes is opened. The injection flow path coupling portion includes a plurality of support ribs protruded toward the flow path distributor and including a support rib corresponding to at least one of the distribution holes.