Washing method in steam injection type washing machine

• US 7,797,777 B2
• Filed: 03/21/2007
• Issued: 09/21/2010
• Est. Priority Date: 04/14/2003
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Oh, Soo Young, Kim, Jin Woong, Woo, Kyung Chul, Jeon, Si Moon
• Primary Examiner(s): Barr; Michael
• Assistant Examiner(s): HECKERT, JASON MARK
• Application Number:
  US11/723,661
• Publication Number:
  US 20070169280A1
• Time in Patent Office: 1,280 Days
• Field of Search: 68/120.1, 68/121.8, 68/122.2, 815/8
• US Class Current: 8/158
• CPC Class Codes: D06F 2105/02 Water supply
• CPC Class Codes: D06F 33/36 of washing
• CPC Class Codes: D06F 39/083 Liquid discharge or recirculation arrangements
• CPC Class Codes: D06F 39/40 Steam generating arrangements
• CPC Class Codes: F22B 1/284 with water in reservoirs
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

A washing method in a steam injection type washing machine in which wash water is heated to generate high temperature and high-pressure steam while passing through the steam supply unit in the wash or rinse cycle, and the generated steam is injected into the wash tub at the top of the wash tub. Accordingly, it is possible to rapidly achieve the wetting of clothes with wash water while achieving an enhancement in sterilization and washing performances. In addition, consumption of water and electrical energy can be reduced.

Claims

1. A washing method in a washing machine having a cabinet, a wash tub located in the cabinet, and a wash drum located in the wash tub, the method comprising:

supplying wash water into the wash tub;

supplying wash water into a steam generator located in the cabinet;

generating steam in the steam generator, the generated steam in the steam generator being independent from air in the tub;

supplying the generated steam to the laundry in the wash drum through a first line that extends from the steam generator to a first upper portion of the wash tub; and

circulating water inside the wash tub through a second line that extends from a bottom of the wash tub to a second upper portion of the wash tub and includes a circulation pump.

2. The washing method of claim 1, wherein the steam is injected during the steam supplying step and the water is injected during the circulating step.

3. The washing method of claim 1, further comprising:

supplying water into the wash drum, and

wherein the steam supplying step is performed together with the water supplying step.

4. The washing method of claim 1, wherein the circulating step is performed together with the steam supplying step.

5. The washing method of claim 1, wherein the laundry in the wash drum is tumbled during the steam supplying step and the circulating step.

6. The washing method of claim 1, further comprising:

re-supplying water into the wash drum; and

circulating the re-supplied water inside the wash drum with the circulation pump.

7. The washing method of claim 6, wherein the laundry in the wash drum is tumbled during the re-supplied water circulating step tub.

8. The washing method of claim 1, wherein the steam supplying step and the circulating step are performed simultaneously.

9. The washing method of claim 1, further comprising driving the drum,

wherein the drum driving step is performed after completing the steam supplying step and the circulating step.

10. The washing method of claim 1, further comprising driving the drum,

wherein the drum driving step is performed together with at least one of the steam supplying step and the circulating step.

11. The washing method of claim 1, further comprising driving the drum,

wherein the drum is tumbled during the drum driving step.

12. The washing method of claim 1, further comprising:

supplying water into the wash drum prior to circulating said water.

13. The washing method of claim 12, wherein the steam supplying step comprises supplying water into a steam supply unit, generating steam by heating the water supplied into the steam supply unit with a heater thereof, and injecting the generated steam into the wash drum.

14. The washing method of claim 13, wherein generating steam by heating the water supplied into the steam supply unit is performed after completing the water supplying step.

15. The washing method of claim 1, wherein water is supplied into the steam supply unit while supplying water into the wash drum.

16. The washing method of claim 12, wherein water is supplied into the steam supply unit while supplying water into the wash drum.

17. The washing method of claim 13, wherein the water supplying step and supplying water into the steam supply unit are performed simultaneously.

18. The washing method of claim 1, wherein supplying wash water into the wash tub includes supplying wash water from a water source, and supplying wash water into the steam generator includes supplying wash water from the water source.

19. A washing method in a washing machine having a cabinet, a wash tub located in the cabinet, and a wash drum located in the wash tub, the method comprising:

supplying wash water into the wash tub from a water source located at the cabinet;

supplying wash water into the steam generator located in the cabinet from the water source;

generating steam in the steam generator;

supplying steam to the laundry in the wash drum through a first line that extends from the steam generator to an upper portion of the wash tub, wherein the supplied steam in the first line is not mixed with air from the tub; and

circulating water inside the wash tub through a second line that extends from a bottom of the wash tub to an upper portion of the wash tub and includes a circulation pump.

20. A washing method in a washing machine having a cabinet, a wash tub located in the cabinet, and a wash drum located in the wash tub, the method comprising:

supplying wash water into the wash tub from a water source;

supplying water into a steam generator located in the cabinet through a first line that is connected from the water source and includes a valve to open and close thereof;

generating steam in the steam generator, the generated steam in the steam generator being separated from air circulating around the tub;

supplying the generated steam to the laundry in the wash drum through a second line that is in communication with the wash tub at an upper portion of the wash tub, while tumbling the laundry; and

circulating water inside the wash tub through a third line that extends from a bottom of the wash tub to an upper portion of the wash tub and includes a circulation pump, wherein the third line contacts with the second line.

21. A washing method in a washing machine having a cabinet, a wash tub located in the cabinet, and a wash drum located in the wash tub, the method comprising:

supplying wash water into the wash tub from a water source;

supplying water into a steam generator located in the cabinet through a first line that is connected from the water source and includes a valve to open and close thereof;

delivering steam into the wash tub through a second line that extends downwards from the steam generator and is in communication with the wash tub at an upper portion of the wash tub, wherein the delivered steam does not mix with air from the tub on the way to the tub; and

circulating water inside the wash tub through a third line that extends from a bottom of the wash tub to a upper portion of the wash tub and includes a circulation pump, wherein the third line shares a portion of the second line.