A silverware pre-washing and washing system made up of a unitary basin with one to five, and preferably three, vertically movable porous baskets arranged radially around a central vertical lifting and lowering mechanism. The base with unitary basin contains a quantity of washing fluid(s) into which each of the vertically movable porous baskets may be repeatedly immersed. The base cover defines cylindrical ports through which the baskets are raised and lowered. The porous baskets include perforation arrays to allow washing fluid to flow in non-linear paths through the silverware contained in the basket, thereby washing all sides of the silverware and beneficially re-arranging the silverware in the basket as the washing process proceeds.

A dishwasher having a structure so that a height of a rack assembly may be adjusted includes: a main body; a tub provided inside the main body and having an opening; a door provided to open or close the opening of the tub; and a rack assembly disposed inside the tub to accommodate tableware, wherein the rack assembly includes: a frame including a loading portion on which the tableware is placed, the loading portion including a fixing plate and a lifting plate provided to be movable up and down; an operating member provided to be capable of adjusting a height of the lifting plate; and a lifting induction member provided to connect the operating member and the lifting plate, and wherein the lifting plate moves in conjunction with the lifting induction member by the operation of the operating member.

A dishwasher having a structure so that a height of a rack assembly may be adjusted includes: a main body; a tub provided inside the main body and having an opening; a door provided to open or close the opening of the tub; and a rack assembly disposed inside the tub to accommodate tableware, wherein the rack assembly includes: a frame including a loading portion on which the tableware is placed, the loading portion including a fixing plate and a lifting plate provided to be movable up and down; an operating member provided to be capable of adjusting a height of the lifting plate; and a lifting induction member provided to connect the operating member and the lifting plate, and wherein the lifting plate moves in conjunction with the lifting induction member by the operation of the operating member.

Systems and methods for washing and thawing objects, such as vegetables and fruits, where large amounts of lifting of heavy items is minimized, complex and expensive pumping and manifold systems and structures are not required; and system cost and daily maintenance is reduced. The system includes a structure for holding a volume of fluid, a vertical motion structure driven by an electric motor or the like that raises and lowers a basket carrier between an elevated position and a lowered position. In the lowered position, one or more baskets are positioned on a basket carrier and are repeatedly lowered into and raised from the volume of fluid.

A dishwasher having a structure so that a height of a rack assembly may be adjusted includes: a main body; a tub provided inside the main body and having an opening; a door provided to open or close the opening of the tub; and a rack assembly disposed inside the tub to accommodate tableware, wherein the rack assembly includes: a frame including a loading portion on which the tableware is placed, the loading portion including a fixing plate and a lifting plate provided to be movable up and down; an operating member provided to be capable of adjusting a height of the lifting plate; and a lifting induction member provided to connect the operating member and the lifting plate, and wherein the lifting plate moves in conjunction with the lifting induction member by the operation of the operating member.

A dishwasher having a structure so that a height of a rack assembly may be adjusted includes: a main body; a tub provided inside the main body and having an opening; a door provided to open or close the opening of the tub; and a rack assembly disposed inside the tub to accommodate tableware, wherein the rack assembly includes: a frame including a loading portion on which the tableware is placed, the loading portion including a fixing plate and a lifting plate provided to be movable up and down; an operating member provided to be capable of adjusting a height of the lifting plate; and a lifting induction member provided to connect the operating member and the lifting plate, and wherein the lifting plate moves in conjunction with the lifting induction member by the operation of the operating member.

A lifting device for a dishwashing machine includes an electrical drive mechanism constructed to move a dishware receptacle of the dishwashing machine between a start position and an end position. A detection unit detects a current draw of the electrical drive mechanism over a travel distance of the dishware receptacle in the dishwashing machine, and an identification unit identifies a status of the lifting device on the basis of the current draw of the electrical drive mechanism detected over the travel distance.

A lifting device for a dishwashing machine includes an electrical drive mechanism constructed to move a dishware receptacle of the dishwashing machine between a start position and an end position. A detection unit detects a current draw of the electrical drive mechanism over a travel distance of the dishware receptacle in the dishwashing machine, and an identification unit identifies a status of the lifting device on the basis of the current draw of the electrical drive mechanism detected over the travel distance.

A warewash machine carries out at least one of (i) delivering both compressed air and rinse liquid to a plurality of wash spray nozzles of the warewash machine for spraying onto the wares during at least part of a washing operation of a ware cleaning cycle, wherein the wash liquid is recirculated from a wash tank below the spray zone; or (ii) lowering wares from the spray zone into a wash tank below the spray zone to submerge the wares within wash liquid of the wash tank and delivering compressed air into the wash tank during at least part of a washing operation of a ware cleaning cycle; or (iii) delivering both compressed air and rinse liquid to a plurality of rinse spray nozzles of the warewash machine for spraying onto the wares during at least part of a rinsing operation of a ware cleaning cycle.

A warewash machine carries out at least one of (i) delivering both compressed air and rinse liquid to a plurality of wash spray nozzles of the warewash machine for spraying onto the wares during at least part of a washing operation of a ware cleaning cycle, wherein the wash liquid is recirculated from a wash tank below the spray zone; or (ii) lowering wares from the spray zone into a wash tank below the spray zone to submerge the wares within wash liquid of the wash tank and delivering compressed air into the wash tank during at least part of a washing operation of a ware cleaning cycle; or (iii) delivering both compressed air and rinse liquid to a plurality of rinse spray nozzles of the warewash machine for spraying onto the wares during at least part of a rinsing operation of a ware cleaning cycle.