Apparatus and method for controlling steam generating unit of washing machine

• US 20050252250A1
• Filed: 05/12/2005
• Published: 11/17/2005
• Est. Priority Date: 05/13/2004
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Woo, Kyung-Chul, Chung, Yang-Hoon, Oh, Soo-Young
• Application Number:
  US11/127,176
• Publication Number:
  US 20050252250A1
• Time in Patent Office: Days
• US Class Current: 68/12.30
• CPC Class Codes: D06F 2103/04 Quantity, e.g. weight or variation of weight
• CPC Class Codes: D06F 2105/14 Temperature of laundry
• CPC Class Codes: D06F 33/30 Control of washing machines characterised by the purpose or target of the control controlling processes of washer-dryers D06F33/50
• CPC Class Codes: D06F 39/008 Steam generating arrangements
• CPC Class Codes: D06F 39/40 Steam generating arrangements

Abstract

An apparatus for controlling steam generating unit of washing machine is disclosed to reduce power consumption of the washing machine by correcting a temperature value detected by a temperature sensor installed in the washing machine to be the same as an actual temperature value of the laundry. The apparatus for controlling steam generating unit of washing machine includes a correcting unit for correcting a temperature value detected by a temperature sensor installed in the washing machine based on a pre-set temperature correction coefficient according to the weight of the laundry inside the washing machine; and a controller for controlling power applied to a steam generating unit in the washing machine.

Claims

1. An apparatus for controlling a steam generating unit of a washing machine comprising:

a correcting unit for correcting a temperature value detected by a temperature sensor installed in the washing machine based on a pre-set temperature correction coefficient according to the weight of the laundry inside the washing machine; and

a controller for controlling power applied to a steam generating unit in the washing machine based on the corrected temperature value and a pre-set reference temperature value.

2. The apparatus of claim 1, wherein the temperature correction coefficient is a pre-set value to be multiplied to a current weight value of the laundry in order to compensate a difference value between the temperature value previously detected by the temperature sensor according to the weight of the laundry and an actual temperature value of the laundry previously measured according to the weight of the laundry.

3. The apparatus of claim 1, wherein the temperature correction coefficient is a pre-set value in order to make the temperature value detected by the temperature sensor the same as the actual temperature value of the laundry.

4. The apparatus of claim 1, wherein the temperature correcting unit corrects the temperature value detected by the temperature sensor by multiplying the pre-set temperature compensation coefficient to the weight value of the laundry and then adding the obtained value to the temperature value detected by the temperature sensor.

5. The apparatus of claim 1, wherein the temperature correcting unit corrects the temperature value detected by the temperature sensor installed in the washing machine based on the pre-set temperature correction coefficient in order to calculate an actual temperature value of the laundry in the washing machine.

6. The apparatus of claim 5, wherein the temperature correcting unit calculates the actual temperature value (T_ci) of the laundry through an equation of T_ci=T_i+(L_i×

C) wherein T_i is a temperature value currently detected by the temperature sensor, L_i is a current weight value of the laundry, and ‘

C’

is a pre-set temperature correction coefficient for compensating a difference value between the temperature value previously detected by the temperature sensor according to the weight of the laundry and the actual temperature value of the laundry previously measured according to the weight of the laundry.

7. The apparatus of claim 1, wherein the controller cuts off power being applied to the steam generating unit when the corrected temperature value reaches the pre-set reference temperature value.

8. An apparatus for controlling a steam generating unit of a washing machine comprising:

a temperature sensor installed at a lower side of a tub of the washing machine and detecting an ambient temperature;

a load amount calculating unit for calculating the weight of the laundry inside the washing machine;

a temperature correcting unit for correcting a temperature value detected by the temperature sensor so as to be the same as an actual temperature value of the laundry and outputting the corrected temperature value; and

a controller electrically connected with the steam generating unit for spraying steam into the washing machine and controlling the steam generating unit based on the corrected temperature value and a pre-set reference temperature value.

9. The apparatus of claim 8, wherein the controller cuts off power being applied to the steam generating unit when the corrected temperature value is reaches the pre-set reference temperature value.

10. The apparatus of claim 8, wherein, in order to reduce power consumption of the washing machine, when the corrected temperature value reaches the pre-set reference temperature value, the controller cuts off power being applied to the heater of the steam generating unit to prevent steam supply into the washing machine.

11. The apparatus of claim 8, wherein the temperature correcting unit calculates the actual temperature value of the laundry in the washing machine based on a temperature correction coefficient previously set according to the weight of the laundry in the washing machine and a temperature value detected by a temperature sensor installed in the washing machine.

12. The apparatus of claim 11, wherein the temperature correcting unit calculates the actual temperature value (T_ci) of the laundry through an equation of T_ci=T_i+(L_i×

C) wherein T_i is a temperature value currently detected by the temperature sensor, L_i is a current weight value of the laundry, and ‘

C’

is a pre-set temperature correction coefficient for compensating a difference value between the temperature value previously detected by the temperature sensor according to the weight of the laundry and the actual temperature value of the laundry previously measured according to the weight of the laundry.

13. A method for controlling a steam generating unit of a washing machine comprising:

calculating an actual temperature value of the laundry inside the washing machine based on a pre-set temperature correction coefficient according to the weight of the laundry inside the washing machine and a temperature value detected by a temperature sensor installed in the washing machine; and

controlling power applied to a steam generating unit in the washing machine based on the calculated temperature value and a pre-set reference temperature value.

14. The method of claim 13, wherein the temperature correction coefficient is a pre-set value in order to make the temperature value detected by the temperature sensor the same as the actual temperature value of the laundry.

15. The method of claim 13, wherein the step of calculating the actual temperature value of the laundry comprises:

multiplying the temperature compensation coefficient previously set according to the weight of the laundry to the weight value of the laundry; and

adding the obtained value to the temperature value detected by the temperature sensor.

16. The method of claim 13, wherein the actual temperature value (T_ci) of the laundry is calculated through an equation of T_ci=T_i+(L_i×

C) wherein T_i is a temperature value currently detected by the temperature sensor, L_i is a current weight value of the laundry, and ‘

C’

is a pre-set temperature correction coefficient for compensating a difference value between the temperature value previously detected by the temperature sensor according to the weight of the laundry and the actual temperature value of the laundry previously measured according to the weight of the laundry.

17. The method of claim 13, wherein, in the step of controlling power being applied to the steam generating unit, when the calculated actual temperature value reaches the pre-set reference temperature value, power being applied to the steam generating unit is cut off.

18. A method for controlling a steam generating unit of a washing machine, which includes a calculating unit for calculating the weight of the laundry received inside a drum of the washing machine, a temperature sensor installed at a lower side of a tub of the washing machine and detecting an ambient temperature when steam is sprayed into the drum, and a steam generating unit for spraying steam into the drum, the method comprising:

correcting a temperature value detected by the temperature sensor based on a temperature correction coefficient previously set according to the weight of the laundry in order to calculate an actual temperature of the laundry of the washing machine; and

cutting off power being applied to the steam generating unit when the corrected temperature value reaches a pre-set reference temperature value.

19. The method of claim 18, wherein the temperature correction coefficient is a pre-set value to be multiplied to a current weight value of the laundry in order to compensate a difference value between a temperature value previously detected by the temperature sensor according to the weight of the laundry and an actual temperature value of the laundry previously measured according to the weight of the laundry.