A system for generating aqueous ozone solution includes a plurality of auxiliary compartments fluidically coupled to an ozone supply unit enclosure, wherein each of the auxiliary compartments includes a mixing assembly. At least one of the mixing assemblies includes a first flow path for water to flow through and a second flow path in parallel with the first flow path. The first flow path includes one or more ozone intake ports that are fluidically coupled to one or more ozone output ports of the ozone supply unit enclosure. The second flow path includes a control valve that selectively permits a portion of the water to flow through the second flow path to produce a negative pressure in the first flow path so that ozone is drawn into the first flow path and mixed into the water flowing through the first flow path to produce an aqueous ozone solution.

A method for controlling ozonation in a water supply system including an ozonator, a controller functionally connected to the ozonator, a flow meter configured for detecting a flowrate through the water supply system, a valve configured for turning on or off of the water supply system, the method including using the controller for; determining at least one event from flowrate data of the flow meter over a time period of a plurality of days, the at least one event including a time span of a day in which the flowrate remains below or at a threshold value over the time span of a day within each day of the plurality of days; determining overlaps of the at least one event of all days within the time period; determining a frequency of the overlaps of the at least one event over the time period and determining a requirement for ozone.

An illustrative control system for use with an aqueous ozone sanitizing device, for example, for sanitizing objects, including hands, hands and forearms, feet, other tissue, instruments, or other object sanitizing, including rinsing and clinical treatment. One embodiment of the control system includes a proximity sensor for detecting a user proximity to the sanitizing device, sensors for detecting a body part or object placement within a application zone, control of the delivery of desired aqueous ozone concentration and duration to the application zone, control of ozone off-gas mitigation, cycle error detection, and usage data logging, including personnel sanitizing practice compliance.

An illustrative aqueous ozone sanitizing system for body part, tissue, and instrument sanitizing, including hand rinsing and sanitizing includes a sanitizing chamber, spray devices configured to simultaneously irrigate the entire left and right hand of a user, at least two aqueous ozone generators each fluidly coupled to a subset of the spray devices, and a housing for the sanitizing chamber having an opening for guiding the user's hand orientation and position into the sanitizing chamber.

An illustrative aqueous ozone delivery device for use with an aqueous ozone generator cartridge can be used for body part, tissue, and instrument sanitizing, including hand rinsing, hand sanitizing, and clinical treatment. One embodiment includes a hooded sanitizing chamber and spray devices directed to each hand of a user, a docketing station for pluggably receiving a replaceable ozone generator and sensor cartridge, and a controller for sensing hand position and orientation, delivering a desired ozone concentration and duration.

An illustrative control system for use with a replaceable ozone generator cartridge for use with an aqueous ozone delivery device, for example, for sanitizing objects, including hands, hands and forearms, feet, other tissue, instruments, or other object sanitizing. One embodiment of the control system calculates and transmits usage data to a memory device of the ozone generator cartridge, and also includes various sensors and drivers for controlling an aqueous ozone concentration. The control system also provides other data logging, error detection, and identity verification of the replaceable ozone generator cartridge.

An illustrative expendable or reconstructable ozone generator cartridge for an aqueous ozone delivery device, for example, for antimicrobial sanitizing and/or medical treatment, includes a housing for a water ozonating manifold, at least one ozone generating cell coupled to the manifold, and optionally a data logging and authentication feature. Advantageously, a water inlet and aqueous ozone outlet of the ozone generator cartridge is pluggable into and unpluggable from a docking station of the aqueous ozone delivery device, for example, a hand or implement washing and sanitizing device or a medical treatment device.

Disclosed is a system and method for cleaning an ice machine, a cleaning apparatus comprising an ozone generator, at least one fluid line connecting an output from the ozone generator to at least one of a water inlet, a water recirculatory line, and a water reservoir, wherein the cleaning apparatus is configured for use with an ice machine. In some embodiments, one or more sensors are provided and may be configured to detect a call for new ice formation. The one or more sensors may comprise (i) a flow valve sensor, (ii) a sensor configured to detect if water is flowing through a water inlet, (iii) a sensor configured to detect a beginning of new ice formation, and/or (iv) a sensor configured to detect an end of new ice formation.

A novel cell for generating ozonated water, the cell comprises a nafion membrane separating a diamond coated anode, and a gold surfaced cathode enclosed within a cell housing with the catalyst side of the nafion membrane facing the cathode. The cell housing has a cathode housing portion and an anode housing portion separated by the membrane, each housing portion having ridges to enhance substantially even flow of fluid over the cathode and anode. The housing portions contain O-rings in grooves to prevent leaks, and alignment features to keep the electrodes aligned. The cathode and anode have an array of holes allowing fluid to penetrate to the surface of the niobium membrane. Input ports allow fluid to flow into the housing and over the anode and cathode and then out of the housing through outlet ports. The housing may also incorporate an integrated spectral photometer including a bubble trap.

A method of operating an electrochemical cell including introducing an aqueous solution into the electrochemical cell, applying a current across an anode and a cathode to produce a product, monitoring the voltage, dissolved hydrogen, or a condition of the aqueous solution, and applying the current in a pulsed waveform responsive to one of the measured parameters is disclosed. An electrochemical system including an electrochemical cell including an anode and a cathode, a source of an aqueous solution having an outlet fluidly connectable to the electrochemical cell, a sensor for measuring a parameter, and a controller configured to cause the anode and the cathode to apply the current in a pulsed waveform responsive to the parameter measurement is disclosed. Methods of suppressing accumulation of hydrogen gas within the electrochemical cell are also disclosed. Methods of facilitating operation of an electrochemical cell are also disclosed.