A dishwashing machine has a washing chamber, a wash tank formed at a bottom of the washing chamber to store an amount of hot wash water therein, a wash pump mounted to a bottom portion of the wash tank, and a pair of upper and lower wash arms arranged to apply jet streams of the hot wash water supplied thereto from the pump over a rack of dishes placed in the washing chamber, wherein a strainer box is mounted within an upper portion of the wash tank to receive the wash water flowing down from the rack of dishes during washing operation and associated with a side wall of the wash tank to form an opening in communication with the bottom portion of the wash tank, the strainer box having a bottom in communication with a drain pipe to permit the flow of wash water drained therethrough, and wherein a distribution plate is arranged to receive the wash water and introduce it into the strainer box when placed in a first position and to receive the wash water and introduce it into the bottom portion of the wash tank through the opening when placed in a second position.
In a machining liquid processing unit in an electric discharge machine selectively using two types of machining liquid of a first machining liquid not containing therein powder material and a second machining liquid containing conductive powder material mixed therein, a movable shooter is movably provided between a first position where a machining liquid is flown to a first storage section in a machining liquid vessel and a second position where a machining liquid is flown to a second storage section, and the machining liquid discharged from a machining liquid discharge port formed in the machining liquid vessel in an electric discharge machine is selectively flown to either of the first storage section or the second storage section by the movable shooter.
A water circulation system for a dishwasher is provided, and includes a pump housing with a cover mounted in the bottom wall of the washing chamber of the dishwasher. The cover includes a collection chamber with a strainer portion extending around the outside of the chamber, and a filter element positioned on the inside of the chamber. A first portion of the wash water passes through the strainer, which removes large food particles from the water, which is then recirculated by a pump in the pump housing back to the washing chamber. A second portion of wash water is collected in the collection chamber and passes through the filter element to remove food particles therefrom, and then into the pump housing for recirculation by the pump to the washing chamber. The collection chamber includes a drainage outlet for draining collected food particles from the chamber at the end of the wash cycle. A backwash spray of water is also provided to continuously backwash the filter element during the washing cycle so as to prevent clogging of the element.
An under counter dish washing machine has an upper spray assembly with a spray base recessed at the top of the wash compartment. An enclosed control housing is provided around the recess to house various controls in order to make use of what is otherwise wasted space. The sump of the machine is covered by a screen having an opening in which a pump filter moves up and down to open and close the drain opening. The filter has a perforated body so that all water draining to the sump must pass through either the screen openings or the perforations of the pump filter. The supply hose which delivers water to the machine is relieved from constant water pressure by a solenoid valve which closes except during a fill cycle of the machine.
