A portable handheld submersible ultrasonic cleaning device has a generally elongate body defining proximal and distal ends, a power supply and an ultrasonic transducer powered thereby, wherein the distal end exposes the ultrasonic transducer to agitate surrounding water when the base is submerged in the water use. A propeller device comprising a propeller may force the water across the ultrasonic transducer. When cleaning, the device may be held with the distal end thereof submerged for enhanced cleaning and removing surface contaminants such as dust, dirt, oil, pigments, bacteria and the like. The device may be stood upright upon the base on the floor of a container for hands-free application of ultrasound whilst cleaning.

A household dishwasher includes a washing tub, a main body, a door portion configured to open and close an upper surface of the washing tub, a first washing water spray nozzle configured to spray washing water supplied from a door portion water supply pipe to an inside of the washing tub, a second washing water spray nozzle configured to spray the washing water to the inside of the washing tub, a steam generator configured to supply steam to the inside of the washing tub, an ultrasonic vibration part configured to apply ultrasonic vibration to the washing water inside the washing tub such that an ultrasonic washing is performed, and a controller configured to receive a washing command signal of a user and control internal components of the household dishwasher.

A nozzle cleaning device and a method of using the same are disclosed. The nozzle cleaning device has a cavity and a sealed chamber formed therein. The sealed chamber is provided with a cleaning tank, motors, driving bearings connected to the motors, rotation shafts connected to the driving bearings, a cleaning block fitted on the rotation shafts disposed above carrier portions, a heating means, and an ultrasonic wave device, so as to thoroughly clean nozzle portions which the mechanical procedure cannot clean, achieving a better cleaning effect, and being easier to use.

An apparatus for cleaning a surface includes a body defining a cavity and terminating in a distal end that is adapted, in use, to be in the vicinity of a surface to be cleaned such that the surface forms an end wall of a chamber including the cavity; at least one cleaning liquid inlet for flow of a cleaning liquid into the chamber; a divider located in or at the end of the cavity that divides the chamber into first and second portions, the second portion, in use, being in fluid communication with the surface to be cleaned; and an acoustic transducer associated with the first portion to introduce acoustic energy into the chamber; wherein the divider is adapted to permit the passage of acoustic energy therethrough from the first portion to the second portion of the chamber to thereby allow pressure fluctuations to be generated at the surface.

In embodiments, the invention includes a system, an apparatus, and a method for cleaning reusable straws. The system includes a chamber configured to contain a liquid, a siphon to drain the chamber, a transducer to deliver sonic energy to the chamber, and a plurality of straws disposed in the chamber. Each straw includes a tubular wall defining a lumen. The lumen has a length and a cross-sectional area, and the cross-sectional area is substantially constant over the length.

The invention relates to a method of automatic dishwashing in a dishwasher having a wash tank, comprising: in a first step, delivering a first composition to dishware in the tank in the form of a mist; and afterwards, in a second step, delivering a second composition to the dishware in the tank in the form of a jet; wherein the first and second compositions are different, the first composition comprises a bleach, and the second composition is alkaline and comprises a builder. The invention also provides a dishwasher adapted to carry out the inventive method.

An ultrasonic cleaning apparatus with a cleaning reservoir having a plurality of chambers, which are selectably fillable with cleaning fluid. The chambers of the multi-chamber reservoir are fluidly interconnectable, the apparatus further comprising a fluid distribution pump and a controller for sequentially controlling a fluid flow between the chambers during an ultrasonic cleaning cycle. Such a multi-chamber reservoir has the advantage of reducing the total volume of fluid required to clean vessels in the reservoir, since the cleaning process can be performed in a staged or sequential procedure, and the cleaning and/or rinsing fluid reused in each chamber, allowing the apparatus to be more compact.

A method of cleaning a vessel including the steps of: a) providing a cleaning reservoir having a plurality of chambers each for holding a cleaning fluid; b) filling a first chamber of the cleaning reservoir with a cleaning fluid; c) ultrasonically cleaning one or more vessels in the first chamber using the cleaning fluid; d) transferring the cleaning fluid from the first chamber to a second chamber of the cleaning reservoir; and e) ultrasonically cleaning one or more vessels in the second chamber by reusing the cleaning fluid transferred from the first chamber and used to clean the one or more vessels in the first chamber.

Proposed is ultrasonic spoon washing apparatus and method, which use ultrasonic waves generated by one or more ultrasonic oscillators provided on a vertical side wall of polygonal surfaces of a wash tub, so that spoons contained in a spoon support part rotating forward/in reverse may very efficiently and conveniently be washed while the number of revolutions changes for each washing stage, the apparatus including: a frame body; the wash tub mounted inside the frame body; one or more ultrasonic oscillators provided on an outer side of the vertical side wall; a forward/reverse rotation support part including a support shaft and a rotation support pipe; a spoon support part including a holder and a spoon accommodation container; a rinsing water supply part configured to spray the rinsing water together with a rinsing aid; and a wastewater and foreign material discharge part configured to discharge, to the outside, wastewater and foreign materials.

In embodiments, the invention includes a system, an apparatus, and a method for cleaning reusable straws. The system includes a chamber configured to contain a liquid, a siphon to drain the chamber, a transducer to deliver sonic energy to the chamber, and a plurality of straws disposed in the chamber. Each straw includes a tubular wall defining a lumen. The lumen has a length and a cross-sectional area, and the cross-sectional area is substantially constant over the length.