ACTIVE SPECIES RADIATION DEVICE AND ACTIVE SPECIES RADIATION METHOD

• US 20150010430A1
• Filed: 01/11/2013
• Published: 01/08/2015
• Est. Priority Date: 01/13/2012
• Status: Abandoned Application

• Current Assignee: Osaka University
• Original Assignee: Osaka University
• Inventors: Kitano, Katsuhisa, Tani, Atsushi
• Application Number:
  US14/371,893
• Publication Number:
  US 20150010430A1
• Time in Patent Office: Days
• US Class Current: 422/22
• CPC Class Codes: A61L 2/0011 using physical methods
• CPC Class Codes: A61L 2/03 Electric current
• CPC Class Codes: A61L 2/14 Plasma, i.e. ionised gases
• CPC Class Codes: B01J 19/087 employing electric or magnetic energy
• CPC Class Codes: B01J 2219/0809 employing two or more electrodes
• CPC Class Codes: B01J 2219/0815 involving stationary electrodes
• CPC Class Codes: C02F 1/30 by irradiation
• CPC Class Codes: H05H 1/2406 using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
• CPC Class Codes: H05H 1/2465 the plasma being activated by inductive coupling, e.g. using coiled electrodes
• CPC Class Codes: H05H 1/46 using applied electromagnetic fields, e.g. high frequency or microwave energy H05H1/26 takes precedence

Abstract

An active species radiation device is for efficiently radiating active species (active oxygen or nitrogen) by using a plasma source not in contact with an irradiated object. An active species radiation device (100) includes: a chamber (110) in which flows of plasma generation gas and active species generation gas enter and which has an active species radiation port (110c) through which active species are radiated; an upstream electrode (120) positioned in a part of the chamber (110) corresponding to an upstream portion of the flow of the plasma generation gas; and a downstream electrode (130) positioned in a part of the chamber (110) corresponding to a more downstream portion of the flow of the plasma generation gas than the upstream electrode (120). The chamber (110) is configured so that the active species generation gas flows into a position between the upstream electrode (120) and the active species radiation port (110c).

Claims

1-15. -15. (canceled)

16. An active species radiation device comprising:

a chamber in which flows of plasma generation gas and active species generation gas enter and which has an active species radiation port through which active species are radiated;

an upstream electrode that is positioned in a part of the chamber corresponding to an upstream portion of the flow of the plasma generation gas; and

a downstream electrode that is positioned in a part of the chamber corresponding to a more downstream portion of the flow of the plasma generation gas than where the upstream electrode is positioned, the downstream electrode being configured to cause plasma to be generated from the plasma generation gas in a position between the upstream electrode and the downstream electrode, wherein

the chamber includes;

a first pipe part in which the upstream electrode is positioned and having an inflow port for the plasma generation gas;

a second pipe part having an inflow port for the active species generation gas; and

a third pipe part in which the downstream electrode is positioned and having the active species radiation port, and

the first pipe part, the second pipe part, and the third pipe part are joined together in one location so as to form a non-coaxial multi-way tube.

17. The active species radiation device of claim 16, wherein

a multi-phase flow of the plasma generation gas and the active species generation gas is generated in at least a portion between the active species radiation port and a joint portion where the second pipe part and the third pipe part are joined.

18. The active species radiation device of claim 16, wherein

the chamber is composed of a glass tube, and

the upstream electrode is provided on an outer circumference of the first pipe part.

19. The active species radiation device of claim 16, wherein

the upstream electrode positioned in the first pipe part is distant from a joint portion where the first pipe part and the second pipe part are joined.

20. The active species radiation device of claim 16, wherein

the chamber includes a plasma generation region where the plasma is generated, and

the chamber is configured so that the active species generation gas flows into the plasma generation region.

21. The active species radiation device of claim 16, wherein

the chamber is configured so as to have the inflow port for the plasma generation gas and the inflow port for the active species generation gas.

22. The active species radiation device of claim 16, further comprising:

a needle member that is connectable to the active species radiation port, wherein

the active species are radiated from a tip end of the needle member.

23. The active species radiation device of claim 16, wherein

the active species are of at least one selected from among the following:

a hydroxy radical;

a superoxide anion radical;

a hydroperoxyl radical;

singlet oxygen;

an oxygen atom; and

peroxynitrite (ONOO⁻

/ONOOH).

24. The active species radiation device of claim 16, wherein

a voltage applied to the upstream electrode is higher than a voltage applied to the downstream electrode.

25. The active species radiation device of claim 16, wherein

the chamber is configured so that the active species generation gas flows into a position between the upstream electrode and the downstream electrode.

26. An active species radiation method for radiating active species by employing an active species radiation device that includes:

a chamber in which flows of plasma generation gas and active species generation gas enter and which has an active species radiation port through which active species are radiated;

an upstream electrode that is positioned in a part of the chamber corresponding to an upstream portion of the flow of the plasma generation gas; and

a downstream electrode that is positioned in a part of the chamber corresponding to a more downstream portion of the flow of the plasma generation gas than where the upstream electrode is positioned, the downstream electrode being configured to cause plasma to be generated from the plasma generation gas in a position between the upstream electrode and the downstream electrode,

the chamber including;

a first pipe part in which the upstream electrode is positioned and having an inflow port for the plasma generation gas;

a second pipe part having an inflow port for the active species generation gas; and

a third pipe part in which the downstream electrode is positioned and having the active species radiation port,

the first pipe part, the second pipe part, and the third pipe part being joined together in one location so as to form a non-coaxial multi-way tube,

the active species radiation method comprising;

generating plasma by causing the flow of the plasma generation gas to enter;

generating the active species by causing the active species generation gas to flow into the plasma generation gas from which the plasma is being generated; and

radiating the active species through the active species radiation port.

27. The active species radiation method of claim 26, wherein

in the generating the active species, a multi-phase flow of the plasma generation gas and the active species generation gas is generated in at least a portion between the active species radiation port and a joint portion where the second pipe part and the third pipe part are joined.

28. The active species radiation method of claim 26, wherein

the chamber is composed of a glass tube, and

the upstream electrode is provided on an outer circumference of the first pipe part.

29. The active species radiation method of claim 26, wherein

the upstream electrode positioned in the first pipe part is distant from a joint portion where the first pipe part and the second pipe part are joined.

30. The active species radiation method of claim 26, wherein

the chamber includes a plasma generation region where the plasma is generated, and

the chamber is configured so that the active species generation gas flows into the plasma generation region.