Laundry treating appliance with load surface area detection

• US 9,745,688 B2
• Filed: 02/19/2009
• Issued: 08/29/2017
• Est. Priority Date: 02/19/2009
• Status: Active Grant

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: Ashrafzadeh, Farhad, Carow, James P., Kanchanavally, Shreecharan
• Primary Examiner(s): Lu, Jiping
• Application Number:
  US12/388,584
• Publication Number:
  US 20100205820A1
• Time in Patent Office: 3,113 Days
• Field of Search: 34329, 34357, 34380, 34389, 34443, 34498, 34499, 34524
• CPC Class Codes: D06F 2103/02 Characteristics of laundry or load
• CPC Class Codes: D06F 2103/04 Quantity, e.g. weight or variation of weight
• CPC Class Codes: D06F 2103/06 Type or material
• CPC Class Codes: D06F 2105/20 Temperature
• CPC Class Codes: D06F 2105/24 Flow or velocity
• CPC Class Codes: D06F 2105/38 Conditioning or finishing, e.g. control of perfume injection
• CPC Class Codes: D06F 2105/48 Drum speed
• CPC Class Codes: D06F 2105/56 Remaining operation time; Remaining operational cycles
• CPC Class Codes: D06F 34/18 Condition of the laundry, e.g. nature or weight
• CPC Class Codes: D06F 58/36 Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
• CPC Class Codes: G01N 21/255 Details, e.g. use of specially adapted sources, lighting or optical systems

Abstract

The invention relates to a laundry treating appliance and method for controlling the operation of the laundry treating appliance by determining the surface area of the laundry based on image data of the laundry.

Claims

1. A method for controlling the operation of a laundry treating appliance comprising a rotatable drum at least partially defining a treating chamber for receiving laundry for treatment in accordance with a treating cycle of operation, the method comprising:

imaging the laundry to generate image data;

determining a surface area of the laundry from the image data; and

automatically selecting a treating cycle of operation of the laundry treating appliance based on the determined surface area of the laundry.

2. The method according to claim 1, further comprising setting at least one parameter of the treating cycle of operation of the laundry treating appliance based on the determined surface area of the laundry.

3. The method according to claim 2, wherein the at least one parameter is at least one of a rotational speed of a drum, a direction of drum rotation, a temperature in the treating chamber, an air flow through the treating chamber, a type of treating chemistry, an amount of treating chemistry, a start of cycle condition, an end of cycle condition, a start of cycle step condition, an end cycle step condition, a rotational speed of an agitator, a direction of agitator rotation, or a wash liquid fill level.

4. The method according to claim 1, further comprising dispensing a treating chemistry into the treating chamber, wherein a type of the treating chemistry is selected based on the determined surface area of the laundry.

5. The method according to claim 1, further comprising determining a number of individual items of laundry from the image data.

6. The method according to claim 1, wherein imaging the laundry comprises capturing at least one image of a portion of the treating chamber.

7. The method according to claim 1, wherein determining the surface area comprises analyzing the image data by separating the laundry from the background in the image data.

8. The method according to claim 1, wherein determining the surface area comprises separating individual items of laundry from each other based on differences in at least one of saturation, hue, or luminance.

9. The method according to claim 1, wherein imaging the laundry comprises taking at least one of a still image or a moving image.

10. The method according to claim 9, wherein imaging the laundry comprises capturing a digital image.

11. The method according to claim 1, wherein imaging the laundry comprises taking at least one of a visible light image, an ultraviolet light image or an infrared image.

12. A method for controlling the operation of a laundry treating appliance comprising a rotatable drum partially defining a treating chamber containing laundry, the method comprising:

imaging the laundry to generate image data;

automatically determining a number of individual items of laundry from the image data; and

automatically selecting a type of treating chemistry based on the determined number of individual items of laundry.

13. The method according to claim 12, further comprising setting at least one parameter of a treating cycle of operation of the laundry treating appliance based on the determined number of individual items of laundry, wherein the at least one parameter is at least one of a rotational speed of a drum, a direction of drum rotation, a temperature in the treating chamber, an air flow through the treating chamber, an amount of treating chemistry, a start of cycle condition, an end of cycle condition, a start of cycle step condition, an end cycle step condition, a rotational speed of an agitator, a direction of agitator rotation, or a wash liquid fill level.

14. The method according to claim 12, further comprising dispensing the treating chemistry into the treating chamber, wherein an amount of the treating chemistry is selected based on the determined number of individual items of laundry.