A dishwasher and method for operating the same utilize a check valve in a rotatable docking port to control the flow of fluid such as wash fluid or pressurized air to a rotatable conduit supported in the rack of a dishwasher.

A control apparatus for a water flow is disclosed, which comprises an inlet connected to a water supply source; a discharge unit connected to a space where water is stored; a chamber for communicating the inlet with the discharge unit through a first communication unit connected to the inlet and a second communication unit connected to the discharge unit; a valve opening or closing the second communication unit; a first body fixed to any one of the inside of the inlet and the inside of the discharge unit; a first through hole provided to pass through the first body, forming a water flow; a second body fixed to the first body and located inside the first through hole; an elastic body fixed to the second body; a first support unit protruded from the first body to the elastic body, supporting the elastic body and forming a space between the elastic body and the first body to enter water the first through hole; and a second support unit protruded from the first body to the elastic body, selectively supporting the elastic body in accordance with a water pressure.

A spray arm for a dishwasher includes an outlet nozzle which is provided on a bottom side of the spray arm for emptying washing liquor from the spray arm. The outlet nozzle is selectively closed and opened by a valve which is movable from an open position into a closed position in response to a pressure of the washing liquor. The valve is pretensioned in a direction to seek the open position so that the valve automatically opens when the pressure of the washing liquor drops below a predetermined value.

A method for controlling a dishwasher includes: supplying washing water to a sump; rotating an impeller disposed in a washing pump by a washing motor so that the washing water flows into the washing pump from the sump;

operating a heater disposed in the washing pump so as to heat the washing water existing in the washing pump and generate steam to supply to a steam nozzle; and supplying the washing water or steam in the washing pump to the steam nozzle by rotating the impeller at a second set rotational speed lower than a first set rotational speed by the washing motor. The method further includes closing a selector valve, configured to open and close a path between the washing pump and the steam nozzle, when the impeller rotates at the first set rotational speed or higher.

A retrofit auxiliary device for distributing cleaning resources to a household cleaning appliance having a treating chamber is described wherein the device can connect to various household cleaning appliances of different makes and models and can learn the flow of water and detergent during various stages of operation and then perform the dispensing itself.

An automatic dishwasher configured to implement an automatic treating cycle of operation. The automatic dishwasher having a tub and a dish rack located within the dish treating chamber. The dish rack comprising a bottom wall having a first portion defined by a substantially planar portion extending across a first portion of bottom wall and second portion defined by a depression portion extending across a second portion of bottom wall.

A dual-mode water inlet dishwasher includes a shell, an inner container, a spraying arm, a washing pump, a heating washing pump, and a respirator water tank which are provided in the shell. A water trough is provided in the inner container. A water inlet of the water trough is connected to the respirator water tank. A water outlet of the water trough is connected to the heating washing pump. The heating washing pump is connected to the spraying arm. The respirator water tank is provided with a respirator body and a water tank body. A tap water inlet, a water-tank water inlet, and a washing water port are provided on the respirator body or the water tank body. The tap water inlet is connected to tap water by means of a solenoid valve. The water-tank water inlet is connected to the water tank by means of a water pump.

A spray arm, a water pumping mechanism and a cleaning machine thereof are disclosed in the present invention. The spray arm comprises a body (1;1) and a top plate (2;2). An air collection chamber (20;20) is defined between the top plate (2;2) and the top surface (1a; 1a) of the body (1;1), a plurality of water spray holes (13) is arranged in the air collection chamber (20;20), the top plate (2;2) has a plurality of spray openings (21) each corresponding to one water spray hole (13), and a gap (100) is formed between a top end of each water spray hole (13) and a bottom end of the corresponding spray opening (21). According to the Venturi effect, the air in the air collection chamber can be sucked into the spout through the gap when the water flow passes through the water spray hole and is jetted out through the spray opening, such that bubbles are entrained in the jet flow; the bubbles are broken on surfaces of dishes or fruits and vegetables, which can improve dirt stripping force, and improve the washing effect.

A dishwasher includes a tub at least partially forming a treating chamber, a dish rack provided within the wash chamber, and a spray manifold. The spray manifold can have multiple apertures and/or sprayers for emitting wash liquid to define a spray zone.

Disclosed herein is a dishwasher including a main body provided with an open hole and a washing tub; a door configured to open or close the open hole; a door opening/closing member configured to open or close the open hole; an air curtain disposed in the main body, to operate a fan such that ambient air is sucked and the sucked air is discharged; a detector configured to detect information of the fan; and a controller configured to diagnose the failure of the fan based on the detected information of the fan, to control an operation of the door opening/closing member such that the door is opened at a predetermined open time and an open time of the door is delayed when the fan is a failure state, and to control an operation of the fan when the fan is a normal state during a drying operation.