Idec Corporation

Masakazu Kashiwa

Hideaki Kobayashi

Shigeo Maeda

Katsuhisa Ida

A fine bubble-containing liquid generating apparatus includes a generator including a mixing nozzle for leading in gas and pressurized liquid and a fine-bubble generating nozzle for discharging liquid that contains fine bubbles of the led-in gas, a circulation passage for returning liquid discharged from the fine-bubble generating nozzle to the mixing nozzle in a state in which the liquid is isolated from outside air, an extraction part for extracting, as a fine-bubble containing liquid, part of liquid circulating through the generator and the circulation passage, and a replenisher for replenishing the circulation passage with liquid to maintain the amount of liquid circulating through the generator and the circulation passage. With this configuration, it is possible to continuously generate a fine-bubble containing liquid that contains a high density of fine bubbles.

Fine bubble-containing liquid generating apparatus

Initial liquid containing fine bubbles is produced by mixing water and air (step S). Fine bubbles have diameters of less than 1 &#x3bc;m. The density of bubbles in the initial liquid is measured (step S), and when the measured density is less than a target density (step S), the initial liquid is heated and reduced in pressure so that the liquid is vaporized (step S). As a volume of the liquid decreases, the density of fine bubbles increases, and high-density fine bubble-containing liquid is easily obtained. Alternatively, by increasing the density of fine bubbles in the initial liquid with using a filter that does not pass all fine bubbles, high-density fine bubble-containing liquid is easily acquired (step S). When the density of bubbles in the initial liquid is greater than the target density, the initial liquid is diluted (step S).

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Osaka, Japan

Masakazu Kashiwa