METHOD FOR DETECTING SATELLIZATION SPEED OF CLOTHES LOAD IN A HORIZONTAL AXIS LAUNDRY TREATING APPLIANCE

• US 20150368844A1
• Filed: 08/21/2015
• Published: 12/24/2015
• Est. Priority Date: 12/20/2011
• Status: Active Grant

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: JANKE, BRIAN P., RICHMOND, PETER J., ZASOWSKI, PETER E.
• Granted Patent: US 9,587,342 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: D06F 2103/24 Spin speed; Drum movements
• CPC Class Codes: D06F 2105/46 Drum speed; Actuation of motors, e.g. starting or interrupting
• CPC Class Codes: D06F 33/48 Preventing or reducing imbalance or noise

Abstract

A laundry treating appliance may include a rotatable treating chamber for receiving a laundry load for treatment, and a motor for rotating the treating chamber, and may be operated such that during the acceleration of the laundry load toward a satellizing speed, the satellizing of the laundry load may be detected, whereby subsequent operation of the laundry treating appliance may be controlled based on the detection.

Claims

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15. A fabric treating appliance for automatically treating a laundry load according to at least one cycle of operation, comprising:

a rotatable treating chamber for receiving the laundry load for treatment;

a motor for rotating the treating chamber;

a speed sensor outputting a speed signal indicative of the rotational speed of the motor;

a torque sensor outputting a torque signal indicative of the torque of the motor; and

a controller operably coupled to the motor and receiving the speed signal and torque signal, wherein the controller provides an acceleration signal to the motor to increase the rotational speed of the motor to accelerate the rotational speed of the treating chamber from a non-satellizing speed to a satellizing speed, and determines that the treating chamber has reached the satellizing speed by determining when the shape of at least a portion of the torque signal matches a corresponding portion of a reference torque signal, which is indicative of the torque when the laundry load is satellized.

16. The fabric treating appliance of claim 15, further comprising a tub defining an interior and a rotatable drum located within the interior, with the drum defining the treating chamber.

17. The fabric treating appliance of claim 15, further comprising the controller in communication with a memory in which is stored the reference torque signal.

18. The fabric treating appliance of claim 15 wherein the controller provides the acceleration signal to the motor to increase the rotation speed of the motor at a predetermined rate.

19. The fabric treating appliance of claim 18 wherein the predetermined rate is constant.

20. The fabric treating appliance of claim 16 where the portion of the torque signal is generated during a corresponding portion of the acceleration of the motor.

21. The fabric treating appliance of claim 20 where the portion of motor acceleration is one of a predetermined window of time and a predetermined number of degrees of drum rotation.

22. The fabric treating appliance of claim 21 wherein the predetermined window of time is fixed in width and advances forward in time.

23. The fabric treating appliance of claim 15 where the controller determines a difference between the shape of the portion of the torque signal and the corresponding portion of the reference torque signal.

24. The fabric treating appliance of claim 23 where the controller determines the laundry load is satellized when the difference satisfies a reference value.

25. The fabric treating appliance of claim 24 wherein the reference value is a threshold value.

26. The fabric treating appliance of claim 23 wherein the difference comprises the difference in an amplitude of the torque signal and an amplitude of the reference torque signal.

27. The fabric treating appliance of claim 26 wherein the difference comprises the difference between a running average of the amplitude of the torque signal and a running average of the amplitude of the reference torque signal.

28. The fabric treating appliance of claim 27 wherein the running average is a moving running average.

29. The fabric treating appliance of claim 28 wherein the moving running average is determined from a window of data points of fixed length advancing in time.

30. The fabric treating appliance of claim 16 wherein the reference torque signal is selected from a set of reference torque signals differentiated by an acceleration rate and a drum speed.

31. The fabric treating appliance of claim 15 wherein a portion of the motor rotation corresponds to a portion of the treating chamber rotation.

32. The fabric treating appliance of claim 15 wherein a predetermined number of degrees of motor rotation corresponds to a predetermined number of degrees of treating chamber rotation.

33. The fabric treating appliance of claim 15 where a rotational speed of the motor corresponds to a rotational speed of the treating chamber.

34. The fabric treating appliance of claim 16 where a rotational speed of the motor corresponds to a rotational speed of the drum.