Liquid treatment device

Patent metadata

Field	Value
Publication number	US-11618695-B2
Application number	US-202016790617-A
Country	US
Kind code	B2
Filing date	Feb 13, 2020
Priority date	Feb 20, 2019
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

A liquid treatment device includes an electron emitting element, a first power supply, and a second power supply. The electron emitting element including a first electrode which is disposed facing water. The first power supply discharges electrons from the first electrode by applying a drive voltage to the electron emitting element. The second power supply applies a collection voltage between the first electrode and the water. The liquid treatment device preferably controls a substance added to the water by controlling the drive voltage.

First claim

What is claimed is:

1. A liquid treatment device comprising:
an electron emitting element including a first electrode that is disposed facing a liquid, the first electrode being positioned in a location separated from the liquid, the first electrode being disposed above the liquid;
a first voltage applier that discharges electrons from the first electrode into a space in an air located between the first electrode and the liquid by applying a drive voltage to the electron emitting element;
a second voltage applier that moves the electrons discharged in the space in the air toward the liquid by applying a collection voltage between the first electrode and the liquid;
a current measuring device that measures a current that flows through the liquid;
a calculator that calculates an amount of collected charge based on a measurement result of the current measuring device, the amount of collected charge being an amount of charge flowing through the liquid; and
a controller that controls the amount of collected charge,
wherein a value of the drive voltage is less than or equal to 20 volts.

2. The liquid treatment device according to claim 1 , wherein a substance added to the liquid is controlled by controlling the drive voltage.

3. The liquid treatment device according to claim 1 , wherein the controller controls a concentration of a substance added to the liquid by controlling the amount of collected charge.

4. The liquid treatment device according to claim 1 , wherein the controller controls a concentration of a substance added to the liquid based on a comparison between the amount of collected charge calculated by the calculator and a target value of the amount of collected charge.

5. The liquid treatment device according to claim 1 , wherein the controller controls the amount of collected charge by controlling an application time of the drive voltage to the electron emitting element.

6. The liquid treatment device according to claim 1 , wherein the controller controls the amount of collected charge by controlling the collection voltage.

7. The liquid treatment device according to claim 1 ,
wherein the drive voltage is an AC voltage, and
wherein the controller controls the amount of collected charge by controlling a duty ratio of the drive voltage.

8. The liquid treatment device according to claim 1 , wherein
the electron emitting element further includes:
a second electrode; and
an intermediate layer disposed between the first electrode and the second electrode, the intermediate layer being formed with a silicone resin containing dispersed silver nanoparticles.

9. A liquid treatment device comprising:
an electron emitting element including a first electrode that is disposed facing a liquid, the first electrode being positioned in a location separated from the liquid, the first electrode being disposed above the liquid;
a first power supply that is respectively connected to the electron emitting element and a ground point;
a second electrode that is disposed so as to make contact with the liquid; and
a second power supply that is respectively connected to the second electrode and the ground point.

10. A liquid treatment device comprising:
an electron emitting element including:
a first electrode that is disposed facing a liquid, the first electrode being positioned in a location separated from the liquid, the first electrode being disposed above the liquid;
a second electrode;
an intermediate layer disposed between the first electrode and the second electrode, the intermediate layer having a predetermined volume resistivity from 1×10 5 Ω·m to 1×10 9 Ω·m;

a first voltage applier that discharges electrons from the first electrode into a space in an air located between the first electrode and the liquid by applying a drive voltage to the electron emitting element; and
a second voltage applier that moves the electrons discharged in the space in the air toward the liquid by applying a collection voltage between the first electrode and the liquid a current measuring device that measures a current that flows through the liquid,
wherein a value of the drive voltage is less than or equal to 20 volts.

Assignees

• Sharp Kk

Inventors

• Yamaji Hiroyuki
• Komaru Shohei
• Sugimori Fumiaki
• Hirayama Chiharu

Classifications

• C02F1/50

  by addition or application of a germicide or by oligodynamic treatment {(C02F1/4606, C02F1/467, C02F1/76 take precedence)} · CPC title

• C02F2201/4616

  Power supply · CPC title

• C02F2201/46135

  Voltage · CPC title

• C02F1/305 Primary

  with electrons · CPC title

• C02F1/4608 Primary

  using electrical discharges · CPC title