Mobile Surface Cleaner and Method for Generating and Applying an Electrochemically Activated Sanitizing Liquid Having O3 Molecules

• US 20120067738A1
• Filed: 09/16/2011
• Published: 03/22/2012
• Est. Priority Date: 02/10/2006
• Status: Active Grant

• Current Assignee: Tennant Company
• Original Assignee: Tennant Company
• Inventors: Field, Bruce F.
• Granted Patent: US 8,603,320 B2
• Time in Patent Office: Days
• US Class Current: 205/746
• CPC Class Codes: C02F 1/4618 for producing "ionised" acidic or basic water
• CPC Class Codes: C02F 2001/46185 only anodic or acidic water, e.g. for oxidizing or sterilizing
• CPC Class Codes: C02F 2001/4619 only cathodic or alkaline water, e.g. for reducing
• CPC Class Codes: C02F 2001/46195 characterised by the oxidation reduction potential [ORP]
• CPC Class Codes: C02F 2201/008 Mobile apparatus and plants, e.g. mounted on a vehicle for biological treatment C02F2203/008
• CPC Class Codes: C25B 9/73 of the filter-press type
• CPC Class Codes: C25B 9/77 having diaphragms

Abstract

A method and apparatus are provided for generating and applying a sanitizing liquid. The method includes moving a mobile floor cleaning device along a floor and electrochemically activating a liquid on the mobile floor cleaning device by passing the liquid through a functional generator having first and second electrode chambers that are separated by an ion exchange membrane such that the liquid activated in the first electrode chamber comprises O₃ molecules. Substantially all of the liquid activated in the first and second electrode chambers are dispensed from the device within 5 seconds of the time at which the liquids are activated by the functional generator without an intermediate step of storing either of the liquids produced in the first or second electrode chambers. At least some of the dispensed liquid is recovered from the floor with a recovery device carried by the mobile floor cleaning device.

Claims

1. A mobile surface cleaner comprising:

a mobile body configured to travel over a surface;

a least one wheel connected to the mobile body to move the mobile body across the surface;

a source of a liquid;

a pump;

a liquid dispenser;

a functional generator, which comprises first and second electrode chambers, which are separated by an ion exchange membrane and which are configured to electrochemically activate the liquid from the liquid source that is passed through the functional generator, at least one of the electrode chambers being configured to produce an electrochemically activated sanitizing liquid comprising O₃ molecules;

a flow path, from the liquid source to the liquid dispenser, which passes through the functional generator and is configured to combine all the liquid produced in the first electrode chamber and all of the liquid produced in the second electrode chamber to form a combined liquid on the cleaner;

a control circuit coupled to the pump and the functional generator and configured to energize the pump to pump the liquid along the flow path and energize the functional generator to electrochemically activate the liquid that is passed through the functional generator and during which substantially all of the combined liquid is dispensed from the mobile floor cleaning device upon electrical activation by the functional generator; and

a fluid recovery device connected to the mobile body.

2. The mobile surface cleaner of claim 1, wherein the flow path lacks any liquid storage tanks between the functional generator and the dispenser, and the functional generator is configured to combine all of the liquid produced in the first electrode chamber and all of the liquid produced in the second electrode chamber to form the combined liquid on the cleaner without an intermediate step of storing either of the liquids produced in the first or second electrode chambers.

3. The mobile surface cleaner of claim 1, wherein the flow path comprises:

an output flow tube, which is coupled between an outlet of the functional generator and the dispenser, wherein the pump and the output flow tube are configured to dispense the combined liquid within 5 seconds of the time at which the liquids are produced in the first and second electrode chambers by the functional generator.

4. The mobile surface cleaner of claim 1 wherein at least one of the electrode chambers comprises a metallic mesh electrode.

5. The mobile surface cleaner of claim 1 wherein at least one of the electrode chambers comprises a solid plate electrode.

6. The mobile surface cleaner of claim 1, wherein at least one of the electrode chambers comprises a titanium electrode coated with a metal.

7. The mobile surface cleaner of claim 1, wherein at least one of the electrode chambers comprises a titanium electrode coated with a precious metal.

8. The mobile surface cleaner of claim 1, wherein the fluid recovery device comprises a vacuum squeegee connected to the mobile body to engage the surface.

9. The mobile surface cleaner of claim 1 wherein the cleaner further comprises:

a motorized cleaning head connected to the mobile body and comprising a cleaning tool, wherein the liquid dispenser is configured to apply the combined liquid to at least one of the elements of the group comprising the surface, the cleaning tool or both the surface and the cleaning tool.

21. The method of claim 1, and further comprising:

combining all of the liquid activated in the first electrode chamber and all of the liquid activated in the second electrode chamber to form a combined liquid on the device, which is dispensed according to step c).

10. A mobile surface cleaner comprising:

a mobile body configured to travel over a surface;

a least one wheel connected to the mobile body to move the mobile body across the surface;

a source of a liquid;

a pump;

a liquid dispenser;

a functional generator, which comprises an anode chamber comprising an anode and a cathode chamber comprising a cathode, which are separated by an ion exchange membrane and which are configured to electrochemically activate the liquid from the liquid source that is passed through the functional generator into a sanitizing anolyte liquid comprising O₃ molecules in the anode chamber and a catholyte liquid in the cathode chamber;

a flow path, from the liquid source to the liquid dispenser, which passes through the functional generator and lacks any liquid storage tanks between the functional generator and the dispenser, wherein the flow path is configured to dispense substantially all of the anolyte and catholyte liquids from the mobile surface cleaner upon electrical activation by the functional generator without an intermediate step of storing either of the anolyte or catholyte liquids;

a control circuit coupled to the pump and the functional generator and configured to energize the pump to pump the liquid along the flow path and energize the functional generator to electrochemically activate the liquid that is passed through the functional generator and during; and

a fluid recovery device connected to the mobile body.

11. The mobile surface cleaner of claim 10, wherein the flow path is configured to combine all of the anolyte liquid produced in the anode chamber and all of the catholyte liquid produced in the cathode chamber to form a combined anolyte and catholyte liquid on the cleaner.

12. The mobile surface cleaner of claim 10, wherein the flow path comprises:

at least one output flow tube, which is coupled between an outlet of the functional generator and the dispenser, wherein the pump and the output flow tube are configured to dispense the anolyte and catholyte liquids within 5 seconds of the time at which the anolyte and catholyte liquids are produced by the functional generator.

13. The mobile surface cleaner of claim 10 wherein at least one of the anode or cathode comprises a metallic mesh.

14. The mobile surface cleaner of claim 10 wherein at least one of the anode or cathode comprises a solid plate.

15. The mobile surface cleaner of claim 10, wherein at least one of the anode or cathode comprises titanium coated with a metal.

16. The mobile surface cleaner of claim 10, wherein at least one of the anode or cathode comprises titanium coated with a precious metal.

17. The mobile surface cleaner of claim 10, wherein the fluid recovery device comprises a vacuum squeegee connected to the mobile body to engage the surface.

18. The mobile surface cleaner of claim 10 wherein the cleaner further comprises:

a motorized cleaning head connected to the mobile body and comprising a cleaning tool, wherein the liquid dispenser is configured to apply the combined anolyte and catholyte liquid to at least one of the elements of the group comprising the surface, the cleaning tool or both the surface and the cleaning tool.

19. A method for generating and applying a sanitizing liquid, the method comprising:

a) moving a mobile floor cleaning device along a floor;

b) electrochemically activating a liquid on the mobile floor cleaning device by passing the liquid through a functional generator comprising first and second electrode chambers that are separated by an ion exchange membrane such that the liquid activated in the first electrode chamber comprises O₃ molecules;

c) combining all of the liquid activated in the first and second electrode chambers to form a combined electrochemically activated liquid on the device without an intermediate step of storing either of the liquids produced in the first or second electrode chambers;

d) dispensing substantially all of the combined electrochemically activated liquid from the mobile floor cleaning device upon electrical activation in step b), while moving the mobile floor cleaning device in step a); and

e) recovering at least some of the dispensed liquid from the floor with a recovery device carried by the mobile floor cleaning device.

20. A method for generating and applying a sanitizing liquid, the method comprising:

a) moving a mobile floor cleaning device along a floor;

b) electrochemically activating a liquid on the mobile floor cleaning device by passing the liquid through a functional generator comprising first and second electrode chambers that are separated by an ion exchange membrane such that the liquid activated in the first electrode chamber comprises O₃ molecules;

c) dispensing substantially all of the liquid activated in the first and second electrode chambers from the mobile floor cleaning device within 5 seconds of the time at which the liquids are activated by the functional generator in step b) without an intermediate step of storing either of the liquids produced in the first or second electrode chambers, while moving the mobile floor cleaning device in step a); and

d) recovering at least some of the dispensed liquid from the floor with a recovery device carried by the mobile floor cleaning device.