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 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 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 assembly for a dishwasher appliance is provided. The spray assembly is pivotally mounted over a wash rack and includes one or more spinning nozzles for directing a flow of wash fluid onto articles placed within the wash rack. The spinning nozzles are rotatably mounted to the spray assembly and include one or more vanes that harness the flow of wash fluid to rotate the spinning nozzle. The spinning nozzle has one or more discharge orifices that direct the flow of wash fluid onto articles in the wash chamber in a circular pattern as the spinning nozzle rotates, resulting in better spray coverage with fewer nozzles.

A spray assembly for a dishwasher appliance is provided. The spray assembly is pivotally mounted over a wash rack and includes one or more spinning nozzles for directing a flow of wash fluid onto articles placed within the wash rack. The spinning nozzles are rotatably mounted to the spray assembly and include one or more vanes that harness the flow of wash fluid to rotate the spinning nozzle. The spinning nozzle has one or more discharge orifices that direct the flow of wash fluid onto articles in the wash chamber in a circular pattern as the spinning nozzle rotates, resulting in better spray coverage with fewer nozzles.

A dishwasher is disclosed. The dishwasher includes a tub, a main arm and an auxiliary arm for spraying water to an object to be washed, a fixed gear unit for rotatably supporting the main arm, a rotating gear unit configured to be rotated in engagement with the fixed gear part, a link unit for allowing the auxiliary arm to perform a reciprocating rolling movement, and an auxiliary arm connection unit. The auxiliary arm connection unit includes an extension pipe, a shaft extending from the extension pipe in order to support an interior of the auxiliary arm, and a sealing member protruding from an outer circumferential surface of the extension pipe. The sealing member includes a support member provided on at least one of an upper portion of the sealing member and a lower portion of the sealing member in order to support the interior of the auxiliary arm.

A dishwasher is disclosed. The dishwasher includes a tub, a main arm and an auxiliary arm for spraying water to an object to be washed, a fixed gear unit for rotatably supporting the main arm, a rotating gear unit configured to be rotated in engagement with the fixed gear part, a link unit for allowing the auxiliary arm to perform a reciprocating rolling movement, and an auxiliary arm connection unit. The auxiliary arm connection unit includes an extension pipe, a shaft extending from the extension pipe in order to support an interior of the auxiliary arm, and a sealing member protruding from an outer circumferential surface of the extension pipe. The sealing member includes a support member provided on at least one of an upper portion of the sealing member and a lower portion of the sealing member in order to support the interior of the auxiliary arm.

A dishwasher includes a tub. The dishwasher further includes a spray arm that includes a main arm and an auxiliary arm. The dishwasher further includes a fixed gear part that is connected to the tub, that is configured to rotatably support the main arm, and that includes teeth along an outer circumferential surface of the fixed gear part. The dishwasher further includes a rotating gear part that is connected to the main arm and that is configured to rotate and engage the teeth of the fixed gear part based on rotation of the main arm. The dishwasher further includes a link unit that is connected to the rotating gear part, the main arm, and the auxiliary arm, that is configured to move based on rotation of the rotating gear part, and that is configured to guide reciprocation of the auxiliary arm through the predetermined arc.

A dishwasher includes a tub. The dishwasher further includes a spray arm that includes a main arm and an auxiliary arm. The dishwasher further includes a fixed gear part that is connected to the tub, that is configured to rotatably support the main arm, and that includes teeth along an outer circumferential surface of the fixed gear part. The dishwasher further includes a rotating gear part that is connected to the main arm and that is configured to rotate and engage the teeth of the fixed gear part based on rotation of the main arm. The dishwasher further includes a link unit that is connected to the rotating gear part, the main arm, and the auxiliary arm, that is configured to move based on rotation of the rotating gear part, and that is configured to guide reciprocation of the auxiliary arm through the predetermined arc.

A dishwasher includes a tub. The dishwasher further includes a spray arm that includes a main arm and an auxiliary arm. The dishwasher further includes a fixed gear part that is connected to the tub, that is configured to rotatably support the main arm, and that includes teeth along an outer circumferential surface of the fixed gear part. The dishwasher further includes a rotating gear part that is connected to the main arm and that is configured to rotate and engage the teeth of the fixed gear part based on rotation of the main arm. The dishwasher further includes a link unit that is connected to the rotating gear part, the main arm, and the auxiliary arm, that is configured to move based on rotation of the rotating gear part, and that is configured to guide reciprocation of the auxiliary arm through the predetermined arc.