Electrolyzed water generator and electrolyzed water generation system

Patent metadata

Field	Value
Publication number	US-11795072-B2
Application number	US-201917047869-A
Country	US
Kind code	B2
Filing date	May 15, 2019
Priority date	May 25, 2018
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

An electrolyzed water generator includes anode, cathode, and cation exchange membrane provided between anode and cathode so as to be in contact with at least one of anode and cathode. Gaps in which a flow of water occurs are present between cation exchange membrane and at least one of anode and cathode.

First claim

The invention claimed is:

1. An electrolyzed water generation system comprising:
an electrolyzed water generator comprising:
an anode;
a cathode; and
a cation exchange membrane provided between the anode and the cathode and being in contact with at least one of the anode and the cathode, wherein a gap in which a flow of water occurs is present between the cation exchange membrane and the at least one of the anode and the cathode;

a controller that controls the electrolyzed water generator;
a flow path that supplies the water to the electrolyzed water generator;
a pump that supplies the water to the flow path; and
a flow path change mechanism that is switched to intermittently supply the water from the flow path to the electrolyzed water generator, wherein:
the controller intermittently applies a voltage between the anode and the cathode, and
during a period where the voltage is not applied, the controller causes the pump and the flow path change mechanism to supply the water from the flow path to the electrolyzed water generator.

2. An electrolyzed water generation system comprising:
a trunk flow path supplied with water;
a first branch flow path branched from the trunk flow path;
a first electrolyzed water generator that includes a first anode, a first cathode, and a first cation exchange membrane provided between the first anode and the first cathode, the first electrolyzed water generator being connected to the first branch flow path, and switched between a generation state where electrolyzed water is generated from the water flowing through the first branch flow path and a non-generation state where the electrolyzed water is not generated;
a second branch flow path that is branched from the trunk flow path and supplies the water, flowing through the trunk flow path, to a downstream of the trunk flow path;
a flow path change mechanism that is switched between a first state where the water is supplied from the trunk flow path to the first branch flow path and a second state where the water is supplied from the trunk flow path to the second branch flow path; and
a controller that intermittently applies a voltage between the anode and the cathode, wherein:
the flow path change mechanism is configured to intermittently supply the water from the trunk flow path to the first electrolyzed water generator, and
during a period where the voltage is not applied, the controller causes the flow path change mechanism to supply the water from the trunk flow path to the first electrolyzed water generator.

3. The electrolyzed water generation system according to claim 2 , further comprising a second electrolyzed water generator including a second anode, a second cathode, and a second cation exchange membrane provided between the second anode and the second cathode, the second electrolyzed water generator being connected to the second branch flow path, and switched between a generation state where second electrolyzed water is generated from the water flowing through the second branch flow path and a non-generation state where the second electrolyzed water is not generated.

4. The electrolyzed water generation system according to claim 3 ,
wherein when the controller performs control to switch the flow path change mechanism from the second state to the first state, the controller performs control to switch the first electrolyzed water generator from the non-generation state to the generation state during a period where the second electrolyzed water generator is controlled to be switched from the generation state to the non-generation state and the flow path change mechanism is controlled to be switched from the second state to the first state, and
when the controller performs control to switch the flow path change mechanism from the first state to the second state, the controller performs control to switch the second electrolyzed water generator from the non-generation state to the generation state during a period where the first electrolyzed water generator is controlled to be switched from the generation state to the non-generation state and the flow path change mechanism is controlled to be switched from the first state to the second state.

5. The electrolyzed water generation system according to claim 2 , further comprising a purification device that is connected to the second branch flow path, generates purified water from the water flowing through the second branch flow path, and supplies the generated purified water to a downstream of the second branch flow path.

6. The electrolyzed water generation system according to claim 2 , further comprising a purification device that is connected to the trunk flow path, generates purified water from the water flowing through the trunk flow path, and supplies the generated purified water to the downstream of the trunk flow path, wherein the first electrolyzed water generator uses the purified water as the water and generates the electrolyzed water from the purified water.

7. The electrolyzed water generation system according to claim 2 , wherein
the flow path change mechanism has a first valve connected to the first branch flow path and a second valve connected to the second branch flow path,
in the first state, the first valve is opened, and the second valve is closed, and
in the second state, the first valve is closed, and the second valve is opened.

8. An electrolyzed water generation system, comprising:
an electrolyzed water generator including: an anode; a cathode; and a cation exchange membrane provided between the anode and the cathode, being in contact with at least one of the anode and the cathode, and
a controller that controls the electrolyzed water generator,
wherein the controller intermittently applies a voltage between the anode and the cathode while water continuously flows the electrolyzed water generator.

9. An electrolyzed water generator comprising:
an anode;
a cathode; and
a cation exchange membrane provided between the anode and the cathode, having a first surface facing the cathode and a second surface facing the anode, and being in contact with at least one of the anode and the cathode, wherein:
the cation exchange membrane comprises:
a gap in which a flow of water occurs is present between the cation exchange membrane and the at least one of the anode and the cathode which is in contact with the cation exchange membrane; and
a plurality of membrane holes penetrating the cation exchange membrane to expose an upper surface of the anode facing the cation exchange membrane, each of the plurality of membrane holes being surrounded by a cation exchange membrane material constituting the cation exchange membrane,

the gap communicates with the plurality of membrane holes, and
the gap is formed in at least one of the first surface of the cation exchange membrane, which is contact with the cathode, and the second surface of the cation exchange membrane, which is contact with the anode.

10. The electrolyzed water generator according to claim 9 , wherein the gap is a groove or a cutout.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Inagaki Kenichiro
• Mori Shunsuke
• Nagata Minoru
• Kuroda Mami
• Maekawa Tetsuya

Classifications

• C02F1/46109 Primary

  Electrodes · CPC title

• C02F1/4672

  by electrooxydation · CPC title

• C02F1/46104 Primary

  Devices therefor; Their operating or servicing · CPC title

• C02F2001/46133

  characterised by the material · CPC title

• C02F2201/4611

  Fluid flow · CPC title