Automatic dryer control based on load information

• US 7,735,239 B2
• Filed: 06/20/2006
• Issued: 06/15/2010
• Est. Priority Date: 12/24/2002
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yang, Jae Suk, Jeong, Hae Deog, Cho, In Haeng
• Primary Examiner(s): GRAVINI, STEPHEN MICHAEL
• Application Number:
  US11/455,756
• Publication Number:
  US 20060265897A1
• Time in Patent Office: 1,456 Days
• Field of Search: 344/86, 342/82, 344/91, 344/92, 344/95, 344/99, 68/3.R, 68/20
• US Class Current: 34/282
• CPC Class Codes: D06F 2101/02 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 2105/28 Electric heating
• CPC Class Codes: D06F 34/04 Signal transfer or data transmission arrangements
• 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: D06F 58/40 Control of the initial heating of the drying chamber to its operating temperature

Abstract

A drying machine according to the present invention includes an interface unit connected to a separate washing machine with a data communication line for receiving load information from the washing machine, a rotatable drum containing a load of wet clothes which are previously washed by the washing machine, and an air supply system coupled to the drum for supplying dry air into the drum. The machine further includes a heater coupled to the air supply system for heating the dry air, and a dryer controller generating a control signal to the heater in accordance with a set of operation values which are determined based on the load information. A method of operating a drying machine according to the present invention includes the steps of receiving load information from a separate washing machine that performs wash/dehydration cycles on a load of clothes, determining a set of optimal operation values for operating a heater on the basis of the load information where the heater heats the dry air being supplied into a drum containing the load of wet clothes, and generating a control signal to the heater in accordance with the determined optional values.

Claims

1. A method of operating a drying machine that dries a load of wet clothes being previously washed and dehydrated by a separate washing machine, the method comprising the steps of:

receiving load information from said washing machine via an interface unit of the dryer connected to said washing machine with a data communication;

determining a first set of optimal operation values for operating a heater on the basis of said load information, said heater heating dry air being supplied by an air supply system into a rotatable drum containing said load of wet clothes;

generating a first control signal to said heater in accordance with said determined first set of operation values;

determining a second set of optimal operational values for operating said drum on the bases of said load information; and

generating a second control signal to an electrical motor rotating said drum in accordance with said determined second set of operation values.

2. The method of claim 1, wherein said load information includes at least one of a load size value and a fabric type which are manually inputted by a washing machine operator or automatically determined by said washing machine.

3. The method of claim 1, wherein said first set of operation values include at least one of a temperature of said heated dry air being supplied into said drum and a total period of supplying power to said heater.

4. The method of claim 1, wherein a second set of optimal operation values include at least one of a rotational speed of said drum and a total period of supplying power to said motor.

7. The method of claim 1, wherein said data communication line is an RS232-C dryer lead 18.

8. The method of claim 1, further comprising the step of receiving dehydration information from said washing machine, said first set of optimal operation values for operating said heater being determined further based on said dehydration information.

9. The method of claim 8, wherein said dehydration information includes at least one of a rotational speed of a washer basket being rotated during said previous dehydration and a total period of said previous dehydration.

5. A method of operating a drying machine that dries a load of wet clothes being previously washed and dehydrated by a separate washing machine, the method comprising the steps of:

receiving load information from said washing machine via an interface unit of the dryer connected to said washing machine with a data communication line;

determining a first set of optimal operation values for operating a heater on the basis of said load information, said heater heating dry air being supplied by an air supply system into a rotatable drum containing said load of wet clothes;

generating a first control signal to said heater in accordance with said determined first set of operation values; and

determining a second set of optimal operational values for operating said air supply system on the bases of said load information; and

generating a second control signal to an electrical motor driving said air supply system in accordance with said determined second set of operation values.

6. The method of claim 5, wherein said second set of optimal operation values include at least one of an air supply rate of said air supply system and a total period of supplying power to said motor.