Pathogen and pest exterminating device and reaction vessel thereof

Patent metadata

Field	Value
Publication number	US-10925285-B2
Application number	US-201716328467-A
Country	US
Kind code	B2
Filing date	Aug 29, 2017
Priority date	Aug 30, 2016
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

A pathogen and pest exterminating device that can efficiently exterminate pathogens and pests in a shorter time. One electrode includes a part to be inserted into a reaction vessel, and other electrode is arranged in a position that opposes the insertion part. A water supply unit is provided to supply water to the reaction vessel through the insertion part, and a gas supply unit provided of supplying gas, which will become plasma, to the reaction vessel. A power supply unit is provided to be capable of applying voltage between the insertion part and the other electrode such that OH radicals are generated inside the reaction vessel to which the water and the gas are supplied. The insertion part is formed in a shape that restricts, between itself and the other electrode, a flow rate of water from the water supply unit such as a coil, waveform, or mesh shape.

First claim

What is claimed is:

1. A pathogen and pest exterminating device, comprising a reaction vessel, a pair of electrodes, a water supply unit, a gas supply unit, and a power supply unit, wherein
one of the electrodes comprises an insertion part to be inserted into the reaction vessel,
the other electrode is arranged at a position that opposes the insertion part,
the water supply unit is provided so as to be capable of supplying water to the reaction vessel through the insertion part,
the gas supply unit is provided so as to be capable of supplying gas, which will become plasma, to the reaction vessel,
the power supply unit is provided so as to be capable of applying voltage between the insertion part and the other electrode such that OH radicals are generated in the reaction vessel to which the water and the gas are supplied, and
the insertion part is formed in a shape that restricts, between itself and the other electrode, a flow rate of the water supplied from the water supply unit.

2. The pathogen and pest exterminating device of claim 1 , wherein the insertion part is formed in a coil, waveform, or mesh shape.

3. A pathogen and pest exterminating device, comprising a reaction vessel, a pair of electrodes, a water supply unit, a flow rate restricting unit, a gas supply unit, and a power supply unit, wherein
one of the electrodes comprises an insertion part to be inserted into the reaction vessel,
the other electrode is arranged in a position that opposes the insertion part,
the water supply unit is provided so as to be capable of supplying water to the reaction vessel through the insertion part,
the flow rate restricting unit is provided so as to be capable of restricting a flow rate of the water supplied from the water supply unit, between the insertion part and the other electrode,
the gas supply unit is provided so as to be capable of supplying gas, which will become plasma, to the reaction vessel, and
the power supply unit is provided so as to be capable of applying voltage between the insertion part and the other electrode such that OH radicals are generated in the reaction vessel to which the water and the gas are supplied.

4. The pathogen and pest exterminating device of claim 1 , wherein
the reaction vessel is formed in a tube shape, where the insertion part is inserted from an opening at one end, and the OH radicals are irradiated from an opening at the other end,
the insertion part is extended along a length direction of the reaction vessel, and
the other electrode is provided along a lateral surface of the reaction vessel, and a length of a portion that opposes the insertion part is from 80 mm to 1000 mm.

5. The pathogen and pest exterminating device of claim 1 , wherein an evaporation rate of the water supplied from the water supply unit in the reaction vessel is 90 μl/min or higher.

6. A reaction vessel of a pathogen and pest exterminating device, comprising an opening part for supplying each of water and gas, which will become plasma, to the inside, and a pair of electrodes, wherein
one of the electrodes comprises an insertion part to be inserted into the reaction vessel from the opening part,
the other electrode is arranged at a position that opposes the insertion part, and
the insertion part is formed in a shape that restricts, between itself and the other electrode, a flow rate of the water supplied from the opening part.

7. The reaction vessel of a pathogen and pest exterminating device of claim 6 , wherein the insertion part is formed in a coil, waveform, or mesh shape.

8. The pathogen and pest exterminating device of claim 2 , wherein
the reaction vessel is formed in a tube shape, where the insertion part is inserted from an opening at one end, and the OH radicals are irradiated from an opening at the other end,
the insertion part is extended along a length direction of the reaction vessel, and
the other electrode is provided along a lateral surface of the reaction vessel, and a length of a portion that opposes the insertion part is from 80 mm to 1000 mm.

9. The pathogen and pest exterminating device of claim 3 , wherein
the reaction vessel is formed in a tube shape, where the insertion part is inserted from an opening at one end, and the OH radicals are irradiated from an opening at the other end,
the insertion part is extended along a length direction of the reaction vessel, and
the other electrode is provided along a lateral surface of the reaction vessel, and a length of a portion that opposes the insertion part is from 80 mm to 1000 mm.

10. The pathogen and pest exterminating device of claim 2 , wherein an evaporation rate of the water supplied from the water supply unit in the reaction vessel is 90 μl/min or higher.

11. The pathogen and pest exterminating device of claim 3 , wherein an evaporation rate of the water supplied from the water supply unit in the reaction vessel is 90 μl/min or higher.

12. The pathogen and pest exterminating device of claim 4 , wherein an evaporation rate of the water supplied from the water supply unit in the reaction vessel is 90 μl/min or higher.

13. The pathogen and pest exterminating device of claim 8 , wherein an evaporation rate of the water supplied from the water supply unit in the reaction vessel is 90 μl/min or higher.

14. The pathogen and pest exterminating device of claim 9 , wherein an evaporation rate of the water supplied from the water supply unit in the reaction vessel is 90 μl/min or higher.

Assignees

• Univ Tohoku

Inventors

• Kaneko Toshiro
• Takashima Keisuke

Classifications

• H05H1/2406

  using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes · CPC title

• A23B2/50

  by irradiation without heating · CPC title

• H05H1/2465

  the plasma being activated by inductive coupling, e.g. using coiled electrodes · CPC title

• H05H1/245

  the plasma being activated using internal electrodes · CPC title

• H05H1/246

  the plasma being activated using external electrodes (H05H1/245 takes precedence) · CPC title