The present invention relates to a dishwasher comprising a body; a heat pump that is disposed inside the body and that has a first heat exchanger providing the heating of the water to be used in the washing step, a second heat exchanger transferring the heat received from the first heat exchanger to the wash water and a compressor fluidly connected to the first heat exchanger and the second heat exchanger, realizing the refrigerant cycle; a water collection tank that is disposed just under the first heat exchanger, wherein the water condensing on the first heat exchanger is collected, and a water softening unit that enables the water taken from the mains to be softened so as to be used in the washing step.

A dishwasher with a tub at least partially defining a treating chamber, a liquid spraying system, a liquid recirculation system defining a recirculation flow path, and a liquid filtering system. The liquid filtering system includes a rotating filter disposed in the recirculation flow path to filter the liquid.

Provided herein is an arrangement in a dishwasher for creating a wash zone with intensified washing in a washing chamber. The arrangement may include a spray arm rotatably arranged around an axis A; a water pump arranged to feed water to the spray arm; and a control unit arranged to control operation of the water pump. At least one additional nozzle may be is arranged on the spray arm. The additional nozzle may be arranged to be opened when the pressure in the water fed from the water pump to the spray arm exceeds a predetermined level. A dishwasher including the described arrangement is also provided.

Provided are a dish washing machine and a controlling method thereof. When water is sprayed from a nozzle while a vane is positioned at a reference position during a drainage operation, since a deflection angle of the vane is bent back and the water is sprayed toward a rear wall of a washing tub, the water forms a fast and strong water current over a bottom plate of the washing tub to remove garbage which remains at a filter while flowing over the bottom of the washing tub. Accumulation at a filter at a top end of a sump and that may block the filter during washing such as preliminary washing, main washing, etc., is washed, thereby eliminating the inconvenience of having to separate and wash the filter, and effectively improves performance by avoiding poor circulation of water that may occur due to a filter blockage or generation of bubbles.

A conveyor dishwasher (2) includes a final rinse zone (18) and at least one wash zone (12, 14, 16, 18) and also a conveyor apparatus for conveying washware through the treatment zones of the conveyor dishwasher (2), wherein the at least one wash zone (12, 14, 16, 18) has an associated wash tank (32, 34, 36) in which at least a portion of the wash liquid which is sprayed in the at least one wash zone (12, 14, 16, 18) is collected. The conveyor dishwasher (2) also has a wastewater pump (61) for supplying wash liquid, which is produced as wastewater during operation of the conveyor dishwasher (2), to a heat exchanger device (60) in which at least a portion of the thermal energy of the supplied wash liquid is transferred to the final rinse liquid which is to be sprayed in the final rinse zone (18).

A conveyor dishwasher (2) having a final rinse zone (18) and at least one wash zone (12, 14, 16, 18) and also a conveyor apparatus for conveying washware through the treatment zones of the conveyor dishwasher (2), wherein the wash zone (12, 14, 16, 18) has an associated wash tank (32, 34, 36) in which at least a portion of the wash liquid which is sprayed in the at least one wash zone (12, 14, 16, 18) is collected. The conveyor dishwasher (2) includes a wastewater pump (61) for supplying wash liquid, which is produced as wastewater during operation of the conveyor dishwasher (2), as required to a heat exchanger device (60) in which at least a portion of the thermal energy of the supplied wash liquid is transferred to the final rinse liquid which is to be sprayed in the final rinse zone (18).

A pump inlet assembly and method of operating a dishwasher appliance are provided. The pump inlet assembly includes an inlet conduit providing fluid communication between a sump and a pump. The inlet conduit defines an integrally formed boss which is coupled with a sensor housing using an overmolding process. A pressure sensor is positioned in the sensor housing and is protected from wash fluid by an airgap defined by the boss. The measured pressure may be used to determine the water level within the dishwasher when the pump is not operating and the suction pressure within the inlet conduit when the pump is operating. The inlet conduit, boss, pressure sensor, and pump housing may be integrally formed by injection molding and/or overmolding processes to reduce costs and the likelihood of leaks.

A dishwasher appliance and method of operation is provided. The dishwasher appliance may include a tub defining a wash chamber, a coarse filter disposed, a recirculation pump, and a drain pump. The method may include activating the recirculation pump to flow wash fluid through the coarse filter in a primary flow direction, and activating the drain pump to flow wash fluid through the coarse filter in the primary flow direction for an initial purge cycle. Further included may be flushing wash fluid through the coarse filter and into the tub in a secondary flow direction opposite from the primary flow direction. Still further included may be activating the recirculation pump to flow wash fluid through the coarse filter in the primary flow direction, and activating the drain pump to flow wash fluid through the coarse filter in the primary flow direction for an additional purge cycle.

A dishwasher is provided. The dishwasher may include a tub forming a washing space, a sump collecting washing water, a tank forming a storage space outside the tub, a motor generating a dynamic force to supply the washing water collected in the sump to the tank, and a controller incrementally increasing a water level of the tank by intermittently driving the motor.

A dishwasher includes a tub at least partially defining a treating chamber, a rotatable spray arm comprising an outlet, and a liquid supply conduit fluidly coupled to the spray arm. A pump can be fluidly coupled to the liquid supply conduit and operated to flow liquid through an aperture in the liquid supply conduit and through the outlet in the rotatable spray arm.