Sump of dish washer

• US 20060118143A1
• Filed: 12/07/2005
• Published: 06/08/2006
• Est. Priority Date: 12/07/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Bang, Jong Chul, Cho, Hung Myong, Ahn, Byung Hwan, Jeong, Hae Deog, Woo, Sang Woo
• Granted Patent: US 8,449,690 B2
• Time in Patent Office: Days
• US Class Current: 134/56.D
• CPC Class Codes: A47L 15/4204 Flat filters
• CPC Class Codes: A47L 15/4208 Arrangements to prevent clogging of the filters, e.g. self-cleaning
• CPC Class Codes: A47L 15/4225 Arrangements or adaption of recirculation or discharge pumps

Abstract

There is provided a sump assembly of a dishwasher. The sump assembly includes a sump case for reserving washing water, the sump case having coupling bosses protruded upward, a sump cover seating on an upper portion of the sump case, the sump cover having a coupling boss and a coupling hole in which a coupling member is inserted, a self-cleaning filter assembly mounted on a top surface of the sump cover to filter foreign objects, the self-cleaning assembly having a coupling hole in which the coupling member is inserted, a washing pump for pumping out the washing water reserved in the sump case, a fluid passage guide for guiding flow of the washing water pumped from the washing pump, the fluid passage being mounted on a bottom of the sump cover, and a pump lower disposed between the washing pump and the fluid passage guide, the pump lower having a first coupling boss formed on a frame portion and a second coupling boss formed therein.

Claims

1. A sump assembly of a dishwasher, comprising:

a sump case for reserving washing water, the sump case having coupling bosses protruded upward;

a sump cover seating on an upper portion of the sump case, the sump cover having a coupling boss and a coupling hole in which a coupling member is inserted;

a self-cleaning filter assembly mounted on a top surface of the sump cover to filter foreign objects, the self-cleaning assembly having a coupling hole in which the coupling member is inserted;

a washing pump for pumping out the washing water reserved in the sump case;

a fluid passage guide for guiding flow of the washing water pumped from the washing pump, the fluid passage being mounted on a bottom of the sump cover; and

a pump lower disposed between the washing pump and the fluid passage guide, the pump lower having a first coupling boss formed on a frame portion and a second coupling boss formed therein.

2. The sump assembly according to claim 1, wherein at least one of the coupling bosses of the sump case is connected to the first coupling boss of the pump lower.

3. The sump assembly according to claim 1, wherein at least one of the coupling bosses of the sump case is connected to the coupling hole of the sump cover after penetrating the pump lower.

4. The sump assembly according to claim 1, wherein at least one of the coupling bosses of the sump case is connected to the coupling boss of the sump cover after penetrating the pump lower and the fluid passage guide.

5. The sump assembly according to claim 1, wherein at least one of the first and second coupling bosses of the pump lower is connected to the coupling boss of the sump cover.

6. The sump assembly according to claim 1, wherein the sump cover and the fluid passage guide are coupled to each other through a thermal bonding process.

7. The sump assembly according to claim 1, wherein the fluid passage guide has a coupling boss extending upward from an inside of the fluid passage guide and the coupling boss of the fluid passage guide is connected to the coupling boss formed on an inner surface of the sump cover.

8. The sump assembly according to claim 1, wherein at least one of the coupling bosses of the sump cover is connected to the coupling hole of the self-cleaning filter member.

9. The sump assembly according to claim 1, further comprising a lower nozzle holder seating on an inner-upper portion of the self-cleaning filter assembly, the lower nozzle holder having at least one coupling hole.

10. The sump assembly according to claim 9, wherein the coupling boss of the sump cover is connected to the coupling hole of the lower nozzle holder after passing through the self-cleaning filter assembly.

11. The sump assembly according to claim 1, wherein at least one of the self-cleaning filter assembly is aligned with the coupling boss of the sump cover, the first coupling boss of the pump lower, and/or the coupling boss of the sump case.

12. The sump assembly according to claim 1, wherein at least one of the coupling holes of the self-cleaning filter assembly is aligned with the coupling boss of the sump cover and/or the second coupling boss of the pump lower.

13. The sump assembly according to claim 1, wherein at least one of the coupling holes of the self-cleaning filter assembly is aligned with the coupling boss of the sump cover and/or the coupling boss of the sump case.

14. The sump assembly according to claim 1, wherein at least one of the coupling holes of the sump cover is aligned with the coupling boss of the sump case.

15. A sump assembly of a dishwasher, comprising:

a lower nozzle holder having a coupling hole in which a coupling member is inserted;

a self-cleaning filter assembly on which the lower nozzle holder seats, the self-cleaning filter having a coupling hole in which the coupling member is inserted;

a sump cover on which the self-cleaning filter assembly seats, the sump cover having at least one coupling boss and/or coupling hole therein;

a fluid passage guide thermal-bonded on a bottom of the sump cover, the fluid passage guide having at least one coupling boss therein;

a pump lower on which the fluid passage guide seats, the pump lower having a soil chamber in which foreign objects contained in washing water are accumulated and at least one coupling boss; and

a sump case on which the pump lower seats, the sump case having at least one coupling boss.

16. The sump assembly according to claim 15, wherein at least one of the coupling bosses of the fluid passage guide is aligned with the coupling boss formed in the sump cover.

17. The sump assembly according to claim 15, wherein the coupling hole of the lower nozzle holder is aligned with the coupling boss of the sump cover and/or the coupling boss o the fluid passage guide.

18. The sump assembly according to claim 15, wherein at least one of the coupling bosses of the sump case passes through the fluid passage guide.

19. A sump assembly of a dishwasher, comprising:

a sump case for reserving washing water;

a heater installed in the sump case to heat the washing water;

a drain pump for draining the washing water to an external side;

a washing pump for pumping out the washing water reserved in the sump case;

a fluid passage guide for guiding flow of the washing water in a state where the washing pump is installed therein;

a turbidity sensor installed on a flow path of the washing water to detect a pollution level of the washing water;

a sump cover having a water recovering hole through which the sprayed washing water is returned into the sump case;

a self-cleaning filter assembly provided on the sump cover to filter foreign objects contained in the washing water pumped out by the washing pump; and

a lower nozzle holder for flowing of the washing water flowing from the fluid passage guide to a lower nozzle.

20. A sump assembly of a dishwasher, comprising:

a sump case for reserving washing water;

a heater installed in the sump case to heat the washing water;

a drain pump for draining the washing water to an external side;

a washing pump for pumping out the washing water reserved in the sump case;

a fluid passage guide for guiding flow of the washing water in a state where the washing pump is installed therein;

a vario valve provided on an end of the fluid passage guide to control a discharging direction of the washing water;

a turbidity sensor detecting a pollution level of the washing water bypassing before flowing to the vario valve;

a sump cover for directing the sprayed washing water into the sump case;

a self-cleaning filter assembly provided on the sump cover to filter foreign objects contained in the washing water pumped out by the washing pump; and

a lower nozzle holder for flowing of the washing water flowing from the fluid passage guide to a lower nozzle.

21. The sump assembly according to claim 20, wherein the vario valve and/or the turbidity sensor is mounted on the sump case.

22. A sump assembly of a dishwasher, comprising:

a sump case for reserving washing water;

a heater installed in the sump case to heat the washing water;

a drain pump for draining the washing water to an external side;

a washing pump for pumping out the washing water reserved in the sump case;

a fluid passage guide for guiding flow of the washing water in a state where the washing pump is installed therein;

a turbidity sensor installed on a flow path of the washing water to detect a pollution level of the washing water;

a sump cover having a water recovering hole through which the sprayed washing water is returned into the sump case;

a self-cleaning filter assembly provided on the sump cover to filter foreign objects contained in the washing water pumped out by the washing pump; and

a lower nozzle holder for flowing of the washing water flowing from the fluid passage guide to a lower nozzle,

wherein the fluid passage guide is divided into a lower fluid passage guide and an upper fluid passage guide partly covering an upper portion of the lower fluid passage guide, the lower and upper fluid passage guides being thermal-bonded to each other.

23. The sump assembly according to claim 22, wherein an opening of the lower fluid passage guide, which is not covered by the upper fluid passage guide, is provided with a soil chamber for filtering foreign objects contained in the washing water that flows backward after passing through the turbidity sensor.

24. A sump assembly of a dishwasher, comprising:

a sump case for reserving washing water;

a heater installed in the sump case to heat the washing water;

a drain pump for draining the washing water to an external side;

a washing pump for pumping out the washing water reserved in the sump case;

a fluid passage guide in which the washing pump is received, the fluid passage guide having a first passage for guiding the washing water discharged from the washing pump to a lower nozzle a water guide passage for guiding the washing water to a water guide, and a turbidity sensor passage for guiding the washing water to the turbidity sensor;

a turbidity sensor installed on a flow path of the washing water to detect a pollution level of the washing water;

a sump cover having a water recovering hole through which the sprayed washing water is returned into the sump case;

a self-cleaning filter assembly provided on the sump cover to filter foreign objects contained in the washing water pumped out by the washing pump; and

a lower nozzle holder for flowing of the washing water flowing from the fluid passage guide to a lower nozzle.

25. A sump assembly of a dishwasher, comprising:

a sump case for reserving washing water;

a heater installed in the sump case to heat the washing water;

a drain pump for draining the washing water to an external side;

a washing pump for pumping out the washing water reserved in the sump case;

a fluid passage guide for guiding flow of the washing water in a state where the washing pump is installed therein;

a lower nozzle holder for guiding flow of the washing water flowing from the fluid passage guide to a lower nozzle;

a turbidity sensor installed on a flow path of the washing water to detect a pollution level of the washing water;

a sump cover to which the lower nozzle holder is fixed; and

a self-cleaning filter assembly provided on the sump cover to filter foreign objects contained in the washing water bypassing from a drain passage extending from the fluid passage guide to the drain pump.