A method for operating a recirculating chemical-sanitizing dishwasher includes filling a wash tank of the dishwasher with water, and performing a first cycle of washing by circulating the water through a wash chamber of the dishwasher. A partial drain is performed of a first amount of water from the wash tank, and new water (for example, rinse water) is added to the wash tank for a second amount of water approximately equal to the first amount. A second cycle of washing is performed by circulating the water through the wash chamber of the dishwasher.

A warewash machine includes a housing at least in part defining a treatment chamber having an access opening, a hood mounted for movement between a closed position for washing and an open position for inlet and outlet of wares through the access opening, at least one nozzle for emitting liquid into the treatment chamber, and a rack track positioned within the treatment chamber for having a dish rack rest thereon. A tray support is mounted for movement relative to the rack track between a lowered position and a raised position, in the lowered position the tray support is at or below a rack support plane defined by the rack track, in the raised position at least part of the tray support is located above the rack support plane. The rack track may be a wire or rod form frame configuration with the tray support mounted thereto.

A dishwashing machine is used for pre-rinse operation of soiled dishes. A cavity is configured and arranged to contain the soiled dishes. A nozzle is proximate the cavity and is in fluid communication with the cavity. An accumulator pan accumulates wash and rinse water including cleaning chemicals used in a previous cycle of the dishwashing machine. A fluid passageway interconnects the nozzle and the accumulator pan. A pump directs the accumulated wash and rinse water from the accumulator pan to the nozzle via the fluid passageway for pre-rinse operation of the soiled dishes in the cavity, and the nozzle directs the accumulated wash and rinse water into the cavity with the soiled dishes to assist in removing soil from the soiled dishes prior to a wash cycle of the dishwashing machine. The wash cycle utilizes fresh wash water.

A system for optical wash item recognition for commercial dishwashers embodied as conveyor dishwashers or as automatic programme dishwashers, in particular hood dishwashers, wherein the system includes an optical recognition system, especially a camera, for recording at least one two-dimensional image of at least some of the wash items to be treated in the dishwasher. The system also includes an analysis device for analysing at least one recorded image in such a way that individual wash items or groups of individual wash items in the recorded image are located and classified. At least one neural network is used to analyse the at least one recorded image.

A dish washing machine including a housing having an interior wash space for washing dishes. The housing has a liquid inlet for adding a liquid to the dish washing machine. At least one spray nozzle sprays the liquid onto dishes positioned within the interior wash space. The machine further includes a heating tank for heating the liquid which is supplied to the at least one spray nozzle for spraying onto the dishes in the interior wash space. At least one heat exchange system is within the housing. The at least one heat exchange system transfers heat from the liquid heated by the heating tank to the liquid added to the dish washing machine from the liquid inlet.

A dish washing machine including a housing having an interior wash space for washing dishes. The housing has a liquid inlet for adding a liquid to the dish washing machine. At least one spray nozzle sprays the liquid onto dishes positioned within the interior wash space. The machine further includes a heating tank for heating the liquid which is supplied to the at least one spray nozzle for spraying onto the dishes in the interior wash space. At least one heat exchange system is within the housing. The at least one heat exchange system transfers heat from the liquid heated by the heating tank to the liquid added to the dish washing machine from the liquid inlet.

A method for cleaning dishes in a warewasher is provided: It may include filling a sump with hot water, dispensing detergent into the sump, running a wash cycle, draining the used hot water and detergent from the sump after the wash cycle, flushing the sump, filling the sump with the aqueous ozone solution, and running a rinse cycle with the aqueous ozone solution. A warewasher is provided: It may include a timer, a wash chamber, a sump, a hot water fill solenoid configured to direct hot water into the sump, a chemical dispenser, at least one spray arm, a circulation pump, an ozone generator assembly configured to provide aqueous ozone solution to the sump, and a drain assembly. The timer may control the hot water fill solenoid, the chemical dispenser, the circulation pump, the ozone generator assembly, and the drain assembly to effectuate a cleaning sequence.

A warewash machine includes a housing, which at least in part, defines a treatment chamber having an access opening, and a door mounted for movement between a lowered and closed position for washing and a raised and open position for inlet and outlet of wares through the access opening. At least one nozzle is provided for emitting liquid into the treatment chamber. A rack track is positioned within the treatment chamber, the rack track movable between a use orientation and a cleaning orientation within the treatment chamber. A track support is mounted for movement between a use orientation and a storage orientation, wherein, when the track support is in the use orientation, the track support is engageable with a portion of the rack track to maintain the rack track in the cleaning orientation.

A warewash machine includes a chamber with a wash zone and front, left and right access openings. At least one spray arm is disposed to spray liquid toward the wash zone. A multi-sided hood assembly includes movable front, left, right and top wall sections, and is movable between a lowered and closed position for washing and a raised open position for inlet and outlet of wares. A stationary chamber rear wall includes an outlet opening fluidly connected with a vapor extraction unit at a back side of the rear wall. The vapor extraction unit includes an enclosure with a condenser therein, wherein incoming water to the machine from a cold water input passes through the condenser, wherein the enclosure includes an air outlet to surrounding ambient environment and at least one air mover.

A dishwasher (1) in the form of a commercial utensil washer or dishwasher which is designed as a batch dishwasher and is realized as a hood-type dishwasher, wherein the dishwasher (1) has a treatment chamber (2) with at least one wash system which is designed as a recirculation system, wherein the treatment chamber (2) has a first treatment zone (6) and at least one further, second treatment zone (7), wherein items of washware can be treated independently of one another and at least temporarily at the same time in the first and in the at least one second treatment zone (6, 7).