Systems and methods for controlling operation of a washing machine

• US 8,713,976 B2
• Filed: 12/29/2006
• Issued: 05/06/2014
• Est. Priority Date: 12/29/2006
• Status: Active Grant

• Current Assignee: Haier US Appliance Solutions, Inc. DBA GE Appliances (Haier Group Company)
• Original Assignee: General Electric Company
• Inventors: Hoppe, Christopher G., Hu, Ziqiang
• Primary Examiner(s): Kornakov, Michael
• Assistant Examiner(s): WHATLEY, KATELYN B
• Application Number:
  US11/647,831
• Publication Number:
  US 20080155761A1
• Time in Patent Office: 2,685 Days
• Field of Search: 815/9, 68/120.4, 68/120.6, 68/122.7, 68/231
• US Class Current: 68/23.1
• CPC Class Codes: D06F 2103/04 Quantity, e.g. weight or variation of weight
• CPC Class Codes: D06F 2103/26 Imbalance; Noise level
• CPC Class Codes: D06F 2105/52 Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
• CPC Class Codes: D06F 33/48 Preventing or reducing imbalance or noise
• CPC Class Codes: D06F 34/16 Imbalance

Abstract

A control system is provided for a washing machine including a cabinet, a wash tub positioned within the cabinet and a wash basket rotatably mounted within the wash tub. The control system includes a plurality of supports including two diagonally arranged supports. The plurality of supports are configured to support the washing machine on a surface. At least one load sensor is positioned with respect to each support of the two diagonally arranged supports. The at least one load sensor is configured to detect at least one force component applied to each support by a load within the wash basket. The at least one load sensor is further configured to generate a signal representative of the at least one force component. A controller is in signal communication with the at least one load sensor. The controller is configured to detect an operating load placement condition within the wash basket in response to at least one signal received from the at least one load sensor.

Claims

1. A control system for a washing machine including a motor, a cabinet, a wash tub positioned within the cabinet and a wash basket rotatably mounted within the wash tub, said control system comprising:

a plurality of supports comprising two diagonally arranged supports, said plurality of supports configured to support the washing machine on a surface;

at least one load sensor positioned with respect to each support of said two diagonally arranged supports, said at least one load sensor configured to detect a level of force applied to a corresponding support by a load within the wash basket, said at least one load sensor further configured to generate a signal representative of the detected level of force;

an input device that enables a user to select a force level threshold and a noise level threshold for a selected operation of the washing machine, and a condition of the surface; and

a controller in signal communication with said input device and said at least one load sensor positioned with respect to each support, said controller being configured to detect an operating load placement condition within the wash basket in response to at least one signal received from said at least one load sensor positioned with respect to each support, said controller further configured to detect a weight and a location of the load within the wash basket in response to the signal received from said at least one load sensor positioned with respect each support, said controller being further configured to maintain a force applied on each of the plurality of supports below the force level threshold selected by the user, and operate a correction process upon detection of an unbalanced load placement condition based at least in part on the condition of the surface,

wherein the controller is further configured to maintain a noise level for the selected operation of the washing machine below the noise level threshold selected by the user and operate the correction process to reduce the noise level for the selected operation of the washing machine based on the condition of the surface and the level of force detected by the at least one load sensor.

2. A control system in accordance with claim 1 wherein said controller is further configured to confirm one of a balanced load placement condition and the unbalanced load placement condition within the wash basket.

3. A control system in accordance with claim 2 wherein said controller is further configured to operate the correction process in response to a confirmation of the unbalanced load placement condition.

4. A control system in accordance with claim 1 wherein said at least one load sensor positioned with respect to each support further comprises at least one load cell configured to detect a weight applied thereon.

13. A control system in accordance with claim 1, wherein the input device is a display configured to receive and display user selection of operation cycles and/or operation features of the washing machine.

14. A control system in accordance with claim 1, wherein operating the correction process to reduce the noise level of the operation of the washing machine comprises at least one of balancing an unbalanced load, adjusting a rotational speed of the wash basket, adjusting an acceleration of the wash basket, and adjusting a wash pattern.

15. A control system in accordance with claim 1, further comprising a motor sensor configured to detect a status of the motor, said motor sensor further configured to generate a signal representative of the status of the motor;

and wherein operating the correction process upon detection of the unbalanced load placement condition is based at least in part on the status of the motor.

5. A washing machine comprising:

a cabinet;

a motor;

a wash tub positioned within said cabinet;

a wash basket rotatably mounted within said wash tub;

a plurality of supports comprising two diagonally arranged supports, said plurality of supports configured to support said washing machine on a surface;

a plurality of load sensors associated with each support of said two diagonally arranged supports, each load sensor of said plurality of load sensors configured to detect a level of force applied to a corresponding support by a load within said wash basket, each load sensor further configured to generate a signal representative of the detected level of force;

an input device that enables a user to select a force level threshold and a noise level threshold for a selected operation of the washing machine and a condition of the surface; and

a controller in signal communication with said input device and said plurality of load sensors, said controller being configured to confirm a load placement condition within said wash basket based at least partially on the signal received from each load sensor, said controller being further configured to detect a weight and a location of the load within said wash basket in response to the signal received from each of said plurality of load sensors, said controller further configured to maintain a force applied on each of the plurality of supports below the force level threshold selected by the user and operate a correction process upon detection of an unbalanced load placement condition based at least in part on the condition of the surface,

wherein the controller is further configured to maintain a noise level for the selected operation of the washing machine below the noise level threshold selected by the user and operate the correction process to reduce the noise level for the selected operation of the washing machine based on the condition of the surface and the level of force detected by the at least one load sensor.

6. A washing machine in accordance with claim 5 wherein said controller is configured to detect one of a balanced load placement condition and the unbalanced load placement condition in response to the signal received from each load sensor.

7. A washing machine in accordance with claim 5 wherein said controller is configured to operate said washing machine at least partially based on detection of one of a balanced load placement condition and the unbalanced load placement condition.

8. A washing machine in accordance with claim 5 wherein said controller is further configured to activate the correction process upon detection of the unbalanced load placement condition.

9. A washing machine in accordance with claim 8 wherein said correction process includes at least one of adjusting a rotational speed of the wash basket, an acceleration of the wash basket, and a wash pattern.

10. A method of operating a washing machine comprising a motor, the method comprising:

providing a cabinet including a wash tub positioned within the cabinet, a wash basket rotatably mounted within the wash tub, and a plurality of supports configured to support the washing machine on a surface operatively coupling a plurality of load sensors to each of two diagonally arranged supports of the plurality of supports, each load sensor of the plurality of load sensors configured to detect a level of force applied to a corresponding support by a load within the wash basket, each load sensor further configured to generate a signal representative of the detected level of force;

providing an input device that enables a user to select a force level threshold and a noise level threshold for a selected operation of the washing machine and a condition of the surface; and

coupling a controller in signal communication with the plurality of load sensors and the input device, the controller being configured to detect an operating load placement condition within the wash basket based at least partially on at least one signal received from the plurality of load sensors, the controller being further configured to detect a weight and a location of the load within the wash basket in response to the signal received from each of the plurality of load sensors, the controller being further configured to maintain a force applied on each of the plurality of supports below the force level threshold selected by the user and operate a correction process upon detection of an unbalanced load placement condition based at least in part on the condition of the surface,

wherein the controller is further configured to maintain a noise level for the selected operation of the washing machine below the noise level threshold selected by the user and operate the correction process to reduce the noise level for the selected operation of the washing machine based on the condition of the surface and the level of force detected by at least one of the plurality of load sensors.

11. A method in accordance with claim 10 further comprising detecting one of a balanced load placement condition and the unbalanced load placement condition based on a signal received from each of the plurality of load sensors.

12. A method in accordance with claim 11 wherein maintaining a force applied on each of the plurality of supports below the force level threshold comprises operating the correction process upon detection of the unbalanced load placement condition.