Micro-bubble generating device
AssigneeNakashima Kogyo Corporation
InventorsYoji NAKASHIMA, Koji Yamada
Life of this patent
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Abstract
A micro-bubble generating device is provided which is capable of mixing or dispersing micro-bubbles into a liquid with high stability and has a simple structure that permits reduction of a cost of manufacture. A first member and a first packing are superposed on each other on one side of a gas-permeable film, while a second member and a second packing are superposed on each other on the other side of the gas-permeable film. A pressurized gas delivered via a gas inlet of the first member flows through a fluid passage of the first packing, permeates through the gas-permeable film, and is ejected as micro-bubbles into a liquid flowing through a fluid passage in the form of a narrow shallow strip-like groove provided in the second packing.
Claims14
A micro-bubble generating device comprising a first member having a gas inlet, a pair of a first packing and a second packing each having a fluid passage in the form of a strip-like groove, a gas-permeable film, and a second member having a liquid inlet and a liquid outlet, and configured such that the first packing and the second packing are disposed on respective opposite surfaces of the gas-permeable film interposed between the first and second packings and such that the first member is disposed on the side of the first packing remote from the gas-permeable film while the second member is disposed on the side of the second packing remote from the gas-permeable film, whereby a pressurized gas delivered to the gas-permeable film via the gas inlet permeates through the gas-permeable film, and is mixed as micro-bubbles into a liquid flowing through the fluid passage formed in the second packing,
- wherein the gas-permeable film has a structure which normally has a low degree of gas permeability and permits generation of the micro-bubbles in the liquid by forced permeation of the pressurized gas therethrough, and the fluid passage in the form of the strip-like groove of the second packing has a small width and permits the micro-bubbles to be ejected into the liquid flowing through the fluid passage.
A micro-bubble generating device comprising:
- a liquid flow body in the form of a cylindrical column having a flow passage formed in its outer circumferential surface so as to extend in its axial direction so that a liquid flows through the flow passage, an inlet opening which is formed in one of its opposite axial end portions and through which the liquid flows into the flow passage, and an outlet opening which is formed in the other axial end portion and through which the liquid is discharged from the flow passage, wherein the outer circumferential surface is covered by a gas-permeable film so as to close an opening of the flow passage open in the outer circumferential surface;
- and
- a casing in the form of a cylindrical sleeve which is open at its opposite ends and which has a gas inlet hole formed through its cylindrical wall and accommodates therein the liquid flow body, the casing and the outer circumferential surface of the liquid flow body define therebetween an internal space accommodating a pressurized gas introduced into the cylindrical sleeve through the gas inlet hole,
- wherein the flow passage is helically formed in the outer circumferential surface, and the gas-permeable film has a structure which normally has a low degree of gas permeability, and permits generation of micro-bubbles in the liquid by forced permeation of the pressurized gas therethrough.
A micro-bubble generating device disposed in water and configured to generate micro-bubbles and eject and disperse the micro-bubbles into the water, the micro-bubble generating device comprising:
- a micro-bubble generating sleeve wherein a cylindrical body of a gas-permeable film formed by generating crazes in a high molecular resin film is fitted on an outer circumferential surface of a cylindrical substrate having a gas flow hole formed through its cylindrical wall and open in the outer circumferential surface, and wherein a hydrophilic unwoven fabric layer is formed on an outer circumferential surface of the cylindrical body, whereby a gas fed from the gas inlet hole of the cylindrical substrate changes into the micro-bubbles during permeation of the gas through the cylindrical body and the unwoven fabric layer;
- rotary driving means for rotating the micro-bubble generating sleeve about its axis, to eject the micro-bubbles from an outer surface portion of the unwoven fabric layer into the water, during rotation of the micro-bubble generating sleeve;
- and
- a gas introducing mechanism for introducing the gas from an external source into a space within a sleeve of the cylindrical substrate, during the rotation of the micro-bubble generating device by the rotary driving means.
Dependencies are inferred from the claim text.