Automatic washing machine incorporating a suds detection and control system

• US 5,890,247 A
• Filed: 12/22/1997
• Issued: 04/06/1999
• Est. Priority Date: 12/22/1997
• Status: Expired due to Fees

• Current Assignee: Maytag Corporation (Whirlpool Corporation)
• Original Assignee: Maytag Corporation (Whirlpool Corporation)
• Inventors: Petersen, Gary N., Erickson, Donald E., Jackson, Charles L., Fey, Margaret H., Ochsner, Douglas A.
• Primary Examiner(s): Coe, Philip R.
• Application Number:
  US08/995,920
• Time in Patent Office: 470 Days
• Field of Search: 8/158, 8/159, 68/12.02, 68/12.12, 68/12.14, 68/12.19
• US Class Current: 8/158
• CPC Class Codes: D06F 39/06 Arrangements for preventing or destroying scum

Abstract

A washing machine for automatically laundering articles of clothing by imparting mechanical actions upon the articles of clothing within a basket of the machine during a washing operation that includes a wash cycle and a preset number of rinse cycles incorporates a control system that functions to alter the mechanical actions imparted upon the articles of clothing during at least the wash cycle, and preferably both the wash cycle and at least one of the rinse cycles, and/or adds a supplemental rinse cycle to the overall washing operation in response to an indication of a high suds level condition in the machine. The control system receives signals indicative of an operating parameter of the washing machine, such as the input torque or operating speed of a motor of the machine, from a detection unit and utilizes these signals to determine the presence of high levels of suds and the need to transfer to a suds reduction mode of operation. In at least a preferred embodiment of the invention, provisions are made to recover from the suds reduction mode by returning to the normal washing operation and/or simply cancel the supplemental rinse cycle.

Claims

1. A washing machine for automatically laundering articles of clothing by imparting mechanical actions upon the articles of clothing within a basket of the machine throughout a washing operation that includes a wash cycle and a preset number of rinse cycles comprising:

a detection unit adapted to sense and indicate high suds level conditions that develop during washing operations; and

a control system for altering the mechanical actions imparted upon the articles of clothing during both the wash cycle and at least one of the rinse cycles in response to an indication of a high suds level condition from said detection unit.

2. The washing machine according to claim 1, further comprising:

a mechanism for developing the mechanical actions imparted on the articles of clothing, wherein said detection unit senses an operating parameter of the mechanism which is indicative of a high suds level condition.

3. The washing machine according to claim 1, wherein the washing machine incorporates an agitator movably mounted within the basket and said control system alters the mechanical actions imparted upon the articles of clothing during the wash cycle by reducing mechanical actions of the agitator.

4. The washing machine according to claim 1, wherein said basket is forced to tumble during the wash cycle and said control system alters the mechanical actions imparted upon the articles of clothing during the wash cycle by initiating a lower duty tumble pattern for the basket.

5. The washing machine according to claim 1, wherein each of the wash cycle and the preset number of rinse cycles incorporates a spin mode and wherein said control system alters the mechanical actions imparted upon the articles of clothing during both the wash cycle and the at least one of the rinse cycles by increasing a rotational speed of the basket from a preset spin rate in response to an indication of a high suds level condition from said detection unit.

6. The washing machine according to claim 1, wherein said control system, in addition to altering the mechanical actions imparted upon the articles of clothing, further establishes a supplemental rinse cycle, beyond said preset number of rinse cycles, for the washing operation in response to an indication of a high suds level condition from said detection unit.

7. The washing machine according to claim 6, wherein said control system is further responsive to said detection unit for canceling the supplemental rinse cycle.

8. The washing machine according to claim 1, wherein said control system is further responsive to said detection unit for re-altering the mechanical actions imparted upon the articles of clothing based on an indication that the high suds level condition no longer exists.

9. The washing machine according to claim 1, wherein said control system further functions to shut down a current operating mode of the washing machine in response to an indication that an exceedingly high suds level condition exists.

10. A washing machine for automatically laundering articles of clothing by imparting mechanical actions upon the articles of clothing within a basket of the machine throughout a washing operation that includes a wash cycle and a preset number of rinse cycles comprising:

a detection unit adapted to sense and indicate high suds level conditions that develop during washing operations; and

a control system for altering the mechanical actions imparted upon the articles of clothing during the wash cycle, without interrupting the wash cycle, in response to an indication of a high suds level condition from said detection unit.

11. The washing machine according to claim 10, wherein the control system alters the mechanical actions imparted upon the articles of clothing during both the wash cycle and at least one of the rinse cycles.

12. The washing machine according to claim 10, wherein said control system, in addition to altering the mechanical actions imparted upon the articles of clothing, further establishes a supplemental rinse cycle, beyond said preset number of rinse cycles, for the washing operation in response to an indication of a high suds level condition from said detection unit.

13. The washing machine according to claim 12, wherein said control system is further responsive to said detection unit for canceling the supplemental rinse cycle.

14. The washing machine according to claim 10, wherein said control system is further responsive to said detection unit for re-altering the mechanical actions imparted upon the articles of clothing based on an indication that the high suds level condition no longer exists.

15. The washing machine according to claim 10, wherein said control system further functions to shut down a current operating mode of the washing machine in response to an indication that an exceedingly high suds level condition exists.

16. An automatic washing machine for laundering articles of clothing through a washing operation including a wash cycle and a predetermined number of rinse cycles comprising:

a housing;

a basket mounted for rotation within said housing, said basket being adapted to receive a supply of water and articles of clothing to be laundered;

a detection unit adapted to sense and indicate high suds level conditions that develop within the washing machine during washing operations; and

a control system, responsive to an indication of a high suds level condition from said detection unit, for altering the washing operation to incorporate a supplemental rinse cycle subsequent to completion of the wash cycle.

17. The washing machine according to claim 16, wherein said control system is further responsive to said detection unit for canceling the supplemental rinse cycle based on an indication that the high suds level condition no longer exists.

18. The washing machine according to claim 16, wherein said control system is further responsive to said detection unit for altering mechanical actions imparted upon the articles of clothing during at least the wash cycle based on an indication that a high suds level condition exists.

19. The washing machine according to claim 18, wherein said basket is forced to tumble during the wash cycle and said control system alters the mechanical actions imparted upon the articles of clothing during the wash cycle by initiating a lower duty tumble pattern for the basket.

20. The washing machine according to claim 18, wherein the control system alters the mechanical actions imparted upon the articles of clothing during the wash cycle without interrupting the wash cycle.

21. The washing machine according to claim 18, wherein the washing machine incorporates an agitator movably mounted within the basket and said control system alters the mechanical actions imparted upon the articles of clothing during the wash cycle by reducing mechanical actions of the agitator.

22. The washing machine according to claim 18, wherein said control system further alters the mechanical actions imparted upon the articles of clothing during both the wash cycle and at least one of the predetermined number of rinse cycles in response to an indication of a high suds level condition from said detection unit.

23. The washing machine according to claim 22, further comprising:

a mechanism for developing the mechanical actions imparted on the articles of clothing, wherein said detection unit senses an operating parameter of the mechanism which is indicative of a high suds level condition.

24. The washing machine according to claim 22, wherein each of the wash cycle and the predetermined number of rinse cycles incorporates a spin mode and wherein said control system alters the mechanical actions imparted upon the articles of clothing during both the wash cycle and the at least one of the predetermined number of rinse cycles by increasing a rotational speed of the basket from a preset spin rate in response to an indication of a high suds level condition from said detection unit.

25. The washing machine according to claim 16, wherein said control system further functions to shut down a current operating mode of the washing machine in response to an indication that an exceedingly high suds level condition exists.

26. In an automatic washing machine for laundering articles of clothing by imparting mechanical actions upon the articles of clothing within a basket of the machine throughout a washing operation that includes a wash cycle and a preset number of rinse cycles, a method of detecting and counteracting a high suds level condition developed during the washing operation comprising:

detecting an operating condition of the washing machine during the washing operation that is responsive to a high suds level condition;

evaluating the operating condition of the washing machine to verify the presence of a high suds level condition; and

issuing a control signal to alter the washing operation by establishing a supplemental rinse cycle, beyond the preset number of rinse cycles and after full completion of the wash cycle, when the high suds level condition is verified.

27. The method according to claim 26, further comprising:

continuing to evaluate the operating condition of the washing machine; and

canceling the supplemental rinse cycle if the high suds level condition is no longer present.

28. The method according to claim 27, further comprising:

returning to a normal washing operation mode upon canceling of the supplemental rinse cycle.

29. The method according to claim 26, further comprising:

altering the mechanical actions imparted upon the articles of clothing in the basket of the washing machine during the washing operation when the high suds level condition is verified.

30. The method according to claim 29, further comprising:

altering the mechanical actions imparted upon the articles of clothing during the wash cycle without interrupting the wash cycle.

31. The method according to claim 29, further comprising:

altering the mechanical actions imparted upon the articles of clothing in the basket during both the wash cycle and at least one of the preset number of rinse cycles.

32. The method according to claim 29, further comprising:

tumbling the basket during the washing operation; and

altering the mechanical actions imparted upon the articles of clothing by commanding a lower duty tumble pattern for the basket.

33. The method according to claim 26, further comprising:

detecting when an exceedingly high suds level condition exists; and

shutting down a current operating mode of the washing machine.

34. In an automatic washing machine for laundering articles of clothing by imparting mechanical actions upon the articles of clothing within a basket of the machine throughout a washing operation that includes a wash cycle and a preset number of rinse cycles, a method of detecting and counteracting a high suds level condition developed during the washing operation comprising:

detecting an operating condition of the washing machine during the washing operation that is responsive to a high suds level condition;

evaluating the operating condition of the washing machine to verify the presence of a high suds level condition; and

issuing a control signal to reduce the mechanical actions imparted upon the articles of clothing during the wash cycle without interrupting the wash cycle.

35. The method according to claim 34, further comprising:

altering the mechanical actions imparted upon the articles of clothing in the basket during both the wash cycle and at least one of the preset number of rinse cycles.

36. The method according to claim 34, further comprising:

detecting when an exceedingly high suds level condition exists; and

shutting down a current operating mode of the washing machine.

37. The method according to claim 34, further comprising:

issuing a control signal to incorporate a supplemental rinse cycle, subsequent to completion of the wash cycle, when the high suds level condition is verified.

38. In an automatic washing machine for laundering articles of clothing by imparting mechanical actions upon the articles of clothing within a basket of the machine throughout a washing operation that includes a wash cycle and a preset number of rinse cycles, a method of detecting and counteracting a high suds level condition developed during the washing operation comprising:

detecting an operating condition of the washing machine during the washing operation that is responsive to a high suds level condition;

evaluating the operating condition of the washing machine to verify the presence of a high suds level condition; and

issuing a control signal to alter the mechanical actions imparted upon the articles of clothing during both the wash cycle and at least one of the preset number of rinse cycles.

39. The method according to claim 38, further comprising:

issuing a control signal to incorporate a supplemental rinse cycle, subsequent to completion of the wash cycle, when the high suds level condition is verified.