A vortex flow inducer has inducer body with an interior end, an outer end and a length extending there between, and a longitudinal axis extending between the interior and the outer ends. A flow passage extends between the interior and outer ends of the inducer body. The flow passage has an inlet at the outer end and an exit at the interior end. The flow passage is swept laterally toward a side of the inducer body in a direction from the outer end toward the interior end such that the exit is laterally offset from the longitudinal axis. The interior end of the inducer body has a concave curvature. The swept flow passage and the curved interior end induce a vortex flow in a fluid flowing through the flow passage as it exits the flow passage and into a flow passage of a conduit the that extends at an angle relative to the longitudinal axis of the inducer body.

Provided is a method of producing an ultrafine bubble-containing liquid containing ultrafine bubbles generated by causing film boiling in a liquid with a heat generation member, including: detaching a solid present at a liquid contact surface of the heat generation member in a form of a microscopic substance by using the film boiling; and generating ultrafine bubbles with the detached microscopic substance as a core.

Provided are: a method of producing heated ozone water, the method capable of producing heated ozone water having an extremely high ozone concentration by suppressing a reduction in the ozone concentration in high-concentration heated ozone water; heated ozone water; and a semiconductor wafer-cleaning liquid using the heated ozone water. A method of producing heated ozone water obtained by dissolving ozone in pure water, the method being characterized by including: adjusting a pH of the pure water to 3 or less by adding acid to the pure water; to obtain an acid water, dissolving an ozone gas in the acid water; and heating the pure water, the acid water or the ozone water, to 60° C. or more.

An ozone injector device comprising a housing having a water passageway through the housing, a corona tube disposed within the housing, an ozone inlet fitting coupled to the water passageway, the ozone inlet being in fluid communication with the corona tube via a corona discharge tube, and a clearing piston positioned to move into and out of the water passageway directly opposite the ozone inlet. The clearing piston is biased upwards, towards to the ozone inlet, and configured to prevent flow of ozone into the water passageway.

A system for generating aqueous ozone solution (AOS) is disclosed. The system includes a system enclosure and a cradle mounted within the system enclosure. The cradle has a wall that defines separate compartments within the system enclosure, including a first compartment for electronic components and a second compartment for a fluid path extending from a water inlet to an AOS outlet. The first compartment contains an ozone generator and a relay mounted to the cradle. The fluid path within the second compartment includes a fluid mixer that is coupled to the ozone generator via one or more tubes extending across (e.g., over or through) the cradle wall that separates the first and second compartments. The fluid mixer is configured to inject ozone generated by the ozone generator into water received from a water source via the water inlet to produce AOS that is output via the AOS outlet.

A transportable system for generating aqueous ozone solution includes a hand truck carrying one or more auxiliary compartments containing respective mixing assemblies that are fluidically coupled to an ozone supply unit. At least one mixing assembly 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. 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 transportable system for generating aqueous ozone solution includes a hand truck carrying one or more auxiliary compartments containing respective mixing assemblies that are fluidically coupled to a variably controlled ozone generator. At least one mixing assembly 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 the variably controlled ozone generator. 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.

An ozone injector device comprising a housing having a water passageway through the housing, a corona tube disposed within the housing, an ozone inlet fitting removably coupled to the water passageway, the ozone inlet being in fluid communication with the corona tube via a corona discharge tube, and a clearing piston positioned to move into and out of the water passageway directly opposite the ozone inlet. The clearing piston is biased upwards, towards to the ozone inlet, and configured to prevent flow of ozone into the water passageway.

Provided are a method for producing an ultra-fine bubble-containing liquid, an ultra-fine bubble-containing liquid, and a method for utilizing and a device for utilizing ultra-fine bubbles that allow highly concentrated UFBs to be maintained for a long period of time and that are capable of effectively utilizing the UFBs. To this end, the method for producing an ultra-fine bubble-containing liquid includes an ultra-fine bubble generating step and a dispersing step to disperse the ultra-fine bubbles. In the ultra-fine bubble generating step, the ultra-fine bubbles are generated in a liquid by heating a heating element and making film boiling on an interface between the liquid and the heating element. In the dispersing step, a floc, which includes two or more ultra-fine bubbles, is dispersed into multiple ultra-fine bubbles by applying vibration to the liquid in which the floc floats.

A water circulation system that includes a pipe assembly for in-line mixing of water and ozone for a recreational or decorative water feature is disclosed. The pipe assembly includes a first flow path for water to flow through. The first flow path includes one or more ozone intake ports that are fluidically coupled to one or more ozone output ports of an ozone supply unit. The pipe assembly further includes a second flow path fluidically coupled in parallel with the first flow path. 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 through the one or more ozone intake ports and mixed into the water flowing through the first flow path.