Dishwashing machine comprising: a controller; a spray arm assembly comprising a spray arm having one or more spray holes for spraying a washing load with water, and a pipe for delivering water to the spray arm; a pump for pumping water through the pipe and to the spray arm; the pipe being constructed and arranged to at least partially restrict flow of water from the pump to at least a part of the spray arm dependent on spray arm orientation relative to the pipe, a power consumption of the pump thereby being dependent at least in part on the spray arm orientation relative to the pipe; and the controller being configured to monitor the power consumption of the pump in order to determine rotational information of the spray arm.

A dishwasher uses washing water containing microbubbles. The dishwasher includes a flow path forming rib that defines a washing water flow path inside an upper body and a lower body of a spray arm. The dishwasher further includes a fusion rib for fusion coupling the upper body and the lower body to effectively secure a flow path structure and simplify a fastening structure.

A dishwasher that includes: a tub configured to accommodate an object; a main arm that is configured to (i) rotate about a first axis inside the tub, (ii) guide first water of the incoming water through a first flow path and second water of the incoming water through a second flow path, and (iii) spray the first water to the object; an auxiliary arm that is configured to (i) rotate about a second axis inside the tub and (ii) spray the second water to the object; and an auxiliary arm connector that couples the main arm to the auxiliary arm and that is rotatable with the auxiliary arm, the auxiliary arm connector including: an auxiliary flow path guide that is configured to (i) guide the second water from the main arm to the auxiliary arm and (ii) control water pressure of the second water is disclosed.

A dishwasher that includes: a washing tub that includes an interior space to accommodate objects; a main arm that is configured to rotate in the interior space and spray water to the objects; an auxiliary arm that is configured to rotate in the interior space and spray water to the objects; a stationary gear unit that is configured to rotate with the main arm, and that includes a plurality of gear teeth; an eccentric gear unit that is configured to rotate based on rotation of the main arm, the eccentric gear unit being in engagement with one or more teeth of the plurality of gear teeth; and a link member that is configured to (i) generate elastic force based on rotation of the eccentric gear unit and (ii) rotate the auxiliary arm based on elastic force is disclosed.

A dishwasher and method utilize a cam-based position sensor that is configured to sense multiple rotational positions for a discretely directable tubular spray element driven by a tubular spray element drive.

An example soaker sink may include a sink basin that receives wash items therein and defines an inlet opening. The soaker sink may further include a manifold that defines an inlet opening, an interior that receives a fluid flow input via the inlet opening, and a plurality of outlets. The outlets may permit discharge of fluid from the interior of the manifold to the sink basin and may include at least a first outlet and may further include a common outlet dimension. The soaker sink may further include a pump fluidically coupled with the inlet opening of the sink basin and the inlet opening of the manifold to recirculate fluid from the sink basin to the manifold. A flow restrictor may be removably coupled with the first outlet and may be configured to modify a flow rate of the fluid discharged via the first outlet.

A dishwasher and method utilize an imaging system to perform various diagnostic operations within the dishwasher, including one or more of level sensing, filter cleaning, wash tub rinse down, foam detection, imaging system cleaning, and remote viewing. A controller may clean a filter by controllably-redirecting a controllably-movable sprayer to spray fluid onto the filter.

A dishwasher may include a sump configured to store water, a main arm disposed at the sump and configured to supply water from the sump, an auxiliary arm rotatably disposed at the main arm and configured to spray water, and an auxiliary arm connection member disposed at the main arm and configured to rotatably support the auxiliary arm, where the auxiliary arm may include an auxiliary flow passage configured to allow water flow through the auxiliary arm, where the main arm may include a transfer flow passage in fluid communication with the auxiliary flow passage, where the auxiliary arm connection member may include a flow tube disposed at the main arm in fluid communication with the transfer flow passage and the auxiliary flow passage.

A spray device assembly for a dishwasher appliance is provided including an outer tube and an inner tube. The outer tube extends along an axial direction and defines an outer tube orifice extending along a length of the outer tube. The inner tube also extends along the axial direction and is rotatably positioned at least partially within an opening of the outer tube. Moreover, the inner tube defines an inner tube orifice extending along a length of the inner tube. The outer tube orifice and inner tube orifice together define a nozzle where the outer tube orifice and the inner tube orifice overlap, the nozzle configured to move along the outer tube orifice as the inner tube and the outer tube are rotated relative to one another.

A dishwasher, dishwasher sprayer, and method of spraying utilize a tubular spray element with multiple selectable spray patterns that can be used during a wash cycle. In some instances, multiple selectable spray patterns may be supported through the use of a multi-walled tubular spray element having concentric wall sections that are movable relative to one another to selectively activate one or more apertures and thereby modify a spray pattern emitted by the tubular spray element. In other instances, multiple selectable spray patterns may be supported through the use of a multi-chamber tubular spray element in which different sets of apertures are in fluid communication with different chambers in the tubular spray element and flow is selectively controlled to one or more of the chambers.