# US 2014/0191425 A1 · System and method for generating nanobubbles

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- Number: US 2014/0191425 A1
- Document ID: US20140191425A1
- Status: Published application
- Kind: A1
- Application number: 14/240,037
- Filed: 2012-12-03
- Published: 2014-07-10
- Earliest claimed: 2011-12-16
- Assignees: Panasonic Corporation
- Applicants: Panasonic Corporation
- Inventors: Hiroshi Yano; Ayumi Sakai
- Web page: https://patentgrep.com/patent/US20140191425A1

## CPC

- B01F 23/23105: {Arrangement or manipulation of the gas bubbling devices}
- B01F 23/23123: {consisting of rigid porous or perforated material}
- B01F 23/233: using driven stirrers with completely immersed stirring elements
- B01F 23/2375: for obtaining bubbles with a size below 1 µm
- B01F 2215/0431: Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof
- B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06)

## Abstract

Provided is a nanobubble generating system and a nanobubble generating method in which nanobubbles exist stably in a liquid phase by a very simple constitution and a very simple process. A nanobubble generating system has a generation chamber for accommodating a gas phase part existing in the upper side and a liquid phase part in contact with the lower side of the gas phase part under sealed condition, a supersaturated dissolved liquid generating device for generating supersaturated dissolved liquid in which a gas is dissolved in the liquid phase part under supersaturated condition, and a nanobubble generating device for feeding a pressurized gas to said supersaturated dissolved liquid via through-holes having a nano-sized opening size to generate nanobubbles having a diameter smaller than 1 μm.

## Claims

### Claim 1

A nanobubble generating system comprising:
a generation chamber for accommodating a gas phase part existing in the upper side and a liquid phase part in contact with the lower side of the gas phase part under sealed condition,
a supersaturated dissolved liquid generating device for generating supersaturated dissolved liquid in which a gas is dissolved in the liquid phase part under supersaturated condition, and
a nanobubble generating device for feeding a pressurized gas to said supersaturated dissolved liquid via through-holes having a nano-sized opening size to generate nanobubbles having a diameter smaller than 1 μm.

### Claim 2 (depends on 1)

The nanobubble generating system according to claim 1, wherein said supersaturated dissolved liquid generating device feeds the pressurized gas to the gas phase part of said generation chamber.

### Claim 3 (depends on 1)

The nanobubble generating system according to claim 1, wherein said supersaturated dissolved liquid generating device feeds the pressurized gas to the liquid phase part of said generation chamber via through-holes.

### Claim 4 (depends on 3)

The nanobubble generating system according to claim 3, wherein said supersaturated dissolved liquid generating device functions also as said nanobubble generating device.

### Claim 5 (depends on 1)

The nanobubble generating system according to claim 1, further equipped with a stirring device for stirring the liquid phase part of said generation chamber.

### Claim 6 (depends on 1)

The nanobubble generating system according to claim 1, further equipped with a water flow generating device for promoting smooth departure of nanobubbles generated by said nanobubble generating device from said nanobubble generating device.

### Claim 7 (depends on 1)

The nanobubble generating system according to claim 1, wherein said through-holes are mutually separated by a greater distance than 3 times of the opening size.

### Claim 8 (depends on 1)

The nanobubble generating system according to claim 1, wherein said generated nanobubbles are monodispersed.

### Claim 9

A nanobubble generating method comprising:
accommodating a gas phase part existing in the upper side and a liquid phase part in contact with the lower side of the gas phase part in a generation chamber under sealed condition,
generating supersaturated dissolved liquid in which a gas is dissolved in the liquid phase part under supersaturated condition, and
feeding a pressurized gas to said supersaturated dissolved liquid via through-holes having a nano-sized opening size to generate nanobubbles having a diameter smaller than 1 μm.

### Claim 10 (depends on 9)

The nanobubble generating method according to claim 9, wherein said supersaturated dissolved liquid is generated by feeding the pressurized gas to the gas phase part of said generation chamber.

### Claim 11 (depends on 9)

The nanobubble generating method according to claim 9, wherein said supersaturated dissolved liquid is generated by feeding the pressurized gas to the liquid phase part of said generation chamber via through-holes.

### Claim 12 (depends on 11)

The nanobubble generating method according to claim 11, wherein generation of said supersaturated dissolved liquid functions also as generation of said nanobubbles.

### Claim 13 (depends on 9)

The nanobubble generating method according to claim 9, further comprising stirring the liquid phase part of said generation chamber.

### Claim 14 (depends on 9)

The nanobubble generating method according to claim 9, further comprising generating a water flow for promoting smooth departure of said generated nanobubbles.

### Claim 15 (depends on 9)

The nanobubble generating method according to claim 9, wherein said through-holes are mutually separated by a greater distance than 3 times of the opening size.

### Claim 16 (depends on 9)

The nanobubble generating method according to claim 9, wherein said generated nanobubbles are monodispersed.