Cleaning machine having a control system for cleaning a surface

• US 7,237,299 B2
• Filed: 05/08/2003
• Issued: 07/03/2007
• Est. Priority Date: 05/08/2003
• Status: Active Grant

• Current Assignee: Healthy Gain Investments Limited
• Original Assignee: Hoover Company (Whirlpool Corporation)
• Inventors: Tondra, Aaron P., Gordon, Evan A.
• Primary Examiner(s): Till; Terrence R.
• Application Number:
  US10/431,707
• Publication Number:
  US 20040221415A1
• Time in Patent Office: 1,517 Days
• Field of Search: 153/19, 153/20, 153/401, 153/402, 153/403, 153/404
• US Class Current: 15/320
• CPC Class Codes: A47L 11/34 Machines for treating carpets in position by liquid, foam, or vapour, e.g. by steam
• CPC Class Codes: A47L 11/4011 Regulation of the cleaning machine by electric means; Control systems and remote control systems therefor
• CPC Class Codes: A47L 11/4061 Steering means; Means for avoiding obstacles; Details related to the place where the driver is accommodated
• CPC Class Codes: A47L 11/4088 Supply pumps; Spraying devices; Supply conduits
• CPC Class Codes: A47L 9/2805 Parameters or conditions being sensed
• CPC Class Codes: A47L 9/2821 Pressure, vacuum level or airflow
• CPC Class Codes: A47L 9/2842 Suction motors or blowers
• CPC Class Codes: A47L 9/2857 User input or output elements for control, e.g. buttons, switches or displays
• CPC Class Codes: A47L 9/2889 Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

A cleaning apparatus for cleaning a surface in which cleaning solution is dispensed to the surface and substantially simultaneously extracted along with the dirt on the surface in a continuous operation is provided. The cleaning apparatus further includes a detecting device for detecting the speed of the cleaning apparatus as it moves along the surface and producing a speed signal representing the speed of the cleaning apparatus relative to the surface. A controller, operatively connected to the detecting device and a component on the cleaning apparatus, controls the function of the component based on the speed signal. The controller can also control the function of the component based on a signal representing other operating characteristics of the cleaning machine.

Claims

1. A cleaning apparatus for cleaning a surface in which cleaning solution is distributed to the surface and substantially simultaneously extracted along with the dirt on the surface in a continuous operation as it moves along the surface comprising:

a) a base assembly for movement along the surface, said base assembly having a front portion and a rear portion;

b) a liquid distribution system associated with said base assembly and including;

a first source providing a supply of said cleaning solution;

a distributor fluidly connected to said first source for distributing said cleaning solution to the surface;

c) a liquid recovery system associated with said base assembly and including;

a suction nozzle having an inlet located at said front portion of said base assembly;

a suction source in fluid communication with said suction nozzle for applying suction to draw the cleaning solution and dirt from the surface and through the suction nozzle;

d) a detecting device for detecting the speed of the cleaning apparatus as it moves along the surface and producing a speed signal representing the speed of the cleaning apparatus relative to the surface;

e) a controller operatively connected to said detecting device and said liquid distribution system, said controller controlling the amount of cleaning solution distributed to the surface based on said speed signal; and

f) a handle pivotally connected to said base assembly, said recovery system including a recovery tank removably mounted to one of said handle and said base assembly, said recovery tank in fluid communication with said suction nozzle for collecting the cleaning solution and dirt drawn through the suction nozzle.

2. The cleaning apparatus of claim 1 wherein said liquid distribution system includes a pump fluidly connected between said first source and said distributor to draw under pressure a predetermined amount of said cleaning solution from said first source to said distributor based on the speed of the pump, said controller coupled to said pump to control the speed of the pump based on said speed signal.

3. The cleaning apparatus of claim 2 including a user interface system operatively connected to said pump, said user interface system including a selector for selecting at least one of a first constant speed of the pump irrespective of the speed signal, a second constant speed of the pump irrespective of the speed signal, and a third speed of the pump based on said speed signal.

4. The cleaning apparatus of claim 1 including at least two wheels rotatably mounted to said base assembly for supporting said base assembly, said detector being operatively connected to at least one of said wheels such that said detector detects the rotational speed of the at least one wheel as the cleaning apparatus moves along the surface.

5. The cleaning apparatus of claim 4 wherein said detector includes a first member mounted to said at least one wheel for rotation therewith, said detector including a second member mounted to said base assembly and operatively associated with said first member to produce said speed signal.

6. The cleaning apparatus of claim 5 wherein said first member comprises a magnetic disk, said second member comprising a hall sensor.

7. The cleaning apparatus of claim 6 including an output device mounted on the cleaning apparatus and operatively connected to the detector for indicating the speed of the cleaning apparatus relative to the surface.

8. The cleaning apparatus of claim 6 wherein said magnetic disk includes alternating opposite polarity magnetic portions.

9. The cleaning apparatus of claim 1 including an agitator operatively connected to said base assembly, wherein said controller is operatively connected to said agitator for controlling the speed of said agitator agitating the surface relative to the base assembly based on said speed signal.

10. A cleaning apparatus for cleaning a surface in which cleaning solution is distributed to the surface and substantially simultaneously extracted along with the dirt on the surface in a continuous operation as it moves along the surface comprising:

a) a base assembly for movement along the surface, said base assembly having a front portion and a rear portion;

b) a liquid distribution system associated with said base assembly and including;

a first source providing a supply of said cleaning solution;

a distributor fluidly connected to said first source for distributing said cleaning solution to the surface;

c) a liquid recovery system associated with said base assembly and including;

a suction nozzle having an inlet located at said front portion of said base assembly;

a suction source in fluid communication with said suction nozzle for applying suction to draw the cleaning solution and dirt from the surface and through the suction nozzle;

d) a detecting device for detecting the speed of the cleaning apparatus as it moves along the surface and producing a speed signal representing the speed of the cleaning apparatus relative to the surface;

e) a controller operatively connected to said detecting device and said liquid distribution system, said controller controlling the amount of cleaning solution distributed to the surface based on said speed signal; and

f) wherein said first source provides a supply of a first liquid, said liquid distribution system further including a second source providing a supply of a second liquid, said cleaning solution being comprised of said first liquid mixed with said second liquid, a mixing control system for adjusting the mix ratio of the first liquid with the second liquid, a controller operatively connected to said detecting device and said mixing control system, said controller controlling the mix ratio of the first liquid with the second liquid in said cleaning solution based on said speed signal.

11. A cleaning apparatus for cleaning a surface in which cleaning solution is distributed to the surface and substantially simultaneously extracted along with the dirt on the surface in a continuous operation as it moves along the surface comprising:

a) a base assembly for movement along the surface;

b) a liquid distribution system associated with said base assembly and including;

a source providing a supply of said cleaning solution;

a distributor fluidly connected to said source for distributing said cleaning solution to the surface;

an agitator operatively connected to said base assembly;

c) a liquid recovery system associated with said base assembly and including;

a suction nozzle;

a suction source in fluid communication with said suction nozzle for applying suction to draw the cleaning solution and dirt from the surface and through the suction nozzle;

d) a detecting device for detecting the speed of the cleaning apparatus as it moves along the surface and producing a speed signal representing the speed of the cleaning apparatus relative to the surface;

e) a controller operatively connected to said detecting device and said agitator, said controller controlling the speed of said agitator agitating the surface relative to the base assembly based on said speed; and

f) a handle pivotally connected to said base assembly, said recovery system including a recovery tank removably mounted to one of said handle and said base assembly, said recovery tank in fluid communication with said suction nozzle for collecting the cleaning solution and dirt drawn through the suction nozzle.

12. The cleaning apparatus of claim 11 including a user interface system operatively connected to said agitator, said user interface system including a selector for selecting at least one of a first constant agitating speed of said agitator irrespective of the speed signal, a second constant agitating speed of the agitator irrespective of the speed signal, and a third agitating speed of the agitator based on said speed signal.

13. The cleaning apparatus of claim 11 including at least two wheels rotatably mounted to said base assembly for supporting said base assembly, said detector being operatively connected to at least one of said wheels such that said detector detects the rotational speed of the at least one wheel as the cleaning apparatus moves along the surface.

14. The cleaning apparatus of claim 13 wherein said detector includes a first member mounted to said at least one wheel for rotation therewith, said detector including a second member mounted to said base assembly and operatively associated with said first member to produce said speed signal.

15. The cleaning apparatus of claim 14 wherein said first member comprises a magnetic disk, said second member comprising a hall sensor.

16. The cleaning apparatus of claim 15 including an output device mounted on the cleaning apparatus and operatively connected to the detector for indicating the speed of the cleaning apparatus relative to the surface.

17. The cleaning apparatus of claim 15 wherein said magnetic disk includes alternating opposite polarity magnetic portions.

18. A method of cleaning a surface with a carpet extractor comprising the steps of:

a) moving the carpet extractor along a surface;

b) detecting a speed of the carpet extractor;

c) mixing a first liquid and a second liquid in the carpet extractor to form a cleaning solution;

d) controlling a mix ratio of said first liquid and said second liquid based on the speed of the carpet extractor; and

e) distributing said cleaning solution from the carpet extractor onto the surface.

19. The method of claim 18 wherein said carpet extractor includes a handle pivotally connected thereto, wherein said handle is pivoted in an incline position while moving the carpet extractor along the surface.

20. The method of claim 18 wherein the operating characteristic is the speed of the carpet extractor moving along the surface.

21. The method of claim 20 including the step of agitating the surface wherein the speed of agitation is controlled based on the speed of the carpet extractor moving along the surface.

22. The method of claim 20 wherein the detecting step includes detecting the rotational speed of one of said wheels using a hall sensor.