A modular water leakage detector includes a housing that carries a plurality of water leakage sensors, an electrical water shutoff valve, and circuitry coupled thereto. In response to sensing water leakage, the circuitry actuates the valve to shut off a water supply. Detectors can communicate alarm indicating signals directly with one another. The detectors can include a wireless transmitter and communicate with a displaced alarm monitoring system.

A detergent dosing controller that is convenient to use and has better effect is disclosed herein. One side of the main passage is a water inlet (101), another side of the main passage is outlet (102) connecting to liquid inlet of washing bucket, and valves A(2), B(3), C(4), D(5), pump (6) and nozzle (7) are equipped. The inlet of valve A connects to the bypass orifice A(a) of the main passage, inlet of valve B connects to liquid storage tank of detergent A, outlets of valve A and valve B connect to inlet of valve C, inlet of valve D connects to liquid storage tank of detergent B, outlets of valve C and valve D connect to inlet of the pump, outlet of the pump connects to bypass orifice B(b) of the main passage, and for the relative location of bypass orifices A and B of main passage, bypass orifice A is relatively close to the inlet of main passage, bypass orifice B is relatively close to the outlet of main passage, the nozzle connects to main passage by concatenation and between bypass orifices A and B. The invention is applicable to the dosing of detergent for electric washing equipments.

Methods and systems for acid regeneration of ion exchange resins are disclosed. Acid resins designed for use in a variety of cleaning application using a water source use a treated, softened, acidic water source according to the invention. Various methods of using the softened acidic water generated by acid regenerate-able ion exchange resins are disclosed to beneficially reduce spotting, filming and scale buildup on treated surfaces, reduce and/or eliminate the need for polymers, threshold reagents and/or rinse aids, and using protons generated in the acidic water effluent for triggering events useful in various cleaning applications.

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 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.

A ware-washer control assembly includes electrical control components, an inlet water plumbing assembly, and a drain mechanism. Each of the electrical control components, inlet water plumbing assembly, and drain mechanism are contained within or attached to a housing for shipment and off-site service and distribution. The housing includes at least a first connector for attaching the housing to a ware-washer cabinet. The ware-washer control assembly further includes a plurality of connectors for connecting the electrical control components and inlet water plumbing assembly to a corresponding supply source and for connecting the drain mechanism to a drain plug assembly. Each of the first connector and the plurality of connectors are connected and disconnected by a user without tools.

Disclosed is a dishwasher. The dishwasher includes a washing tub to form a dish receiving space; a sump disposed at a lower side of the washing tub; a heater which heats washing water received in the sump to generate a stream; a dish rack disposed inside the washing tub so that a plurality of dishes are inserted and stand; and a steam nozzle disposed in a direction facing edges of the plurality of dishes to flow the stream between gaps of the dishes inserted into the dish rack.

A method for filling a wash tub (12) of a dishwasher (10) with water, wherein the wash tub (12) comprises a water-collecting sump pot (16) that is fixed to an opening in its bottom and said method forms part of a program cycle for the operation of the dishwasher, said method comprising the subsequent steps of: (i) opening a water inlet (13) of the dishwasher and executing a static filling of the wash tub wherein a circulation pump of the dishwasher is kept deactivated, (ii) detecting a predetermined lower water level (22) inside the sump pot (16), and (iii) starting to measure the time for the static filling when said lower water level (22) is detected.

A dishwasher appliance is provided, and includes an external housing containing a tub for receiving dishes. The dishwasher configured to receive water from a water source of a dwelling via an external supply line, which includes a valve for directing water between the tub and a water reservoir. Water received into the reservoir will be cooler than the water utilized in the tub to wash dishes. A water pump is connected to the reservoir so that during the drying cycle, the relatively cool water of the reservoir can be pumped through one or more conduits that are in contact with various surfaces of the tub so as to cool the tub interior and cause moisture contained therein to condense and drain out of the tub thereby efficiently enhancing the drying performance of the dishwasher.

A dishwasher appliance includes a tub defining a wash chamber and a wash conduit disposed in the wash chamber on a rear wall of the tub. A third rack assembly is slidably positioned in the wash chamber above a second rack assembly with a third spray assembly positioned within the third rack assembly. The third spray assembly is configured to direct wash fluid at articles located in the third rack assembly. The third spray assembly includes an inlet nozzle at one end. The inlet nozzle is offset from the wash conduit outlet in the lateral direction. A portion of the wash conduit extends along the vertical direction between the second and third rack assemblies.