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A dish washer is provided. In the dish washer, a tub forms a cleaning chamber, and a sump is disposed at a lower portion of the tub and stores wash water. An injection nozzle injects the wash water stored in the sump into the cleaning chamber. A water guide guides the wash water from the sump to the

A dish washer is provided. In the dish washer, a tub forms a cleaning chamber, and a sump is disposed at a lower portion of the tub and stores wash water. An injection nozzle injects the wash water stored in the sump into the cleaning chamber. A water guide guides the wash water from the sump to the nozzle. A first coupling mechanism is used to couple a portion of the water guide to the sump. A second coupling mechanism is used to couple another portion of the water guide to the sump.

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1. A dish washer comprising: a tub forming a cleaning chamber;a sump disposed at a lower portion of the tub and storing wash water;a lower nozzle injecting the wash water stored in the sump into the cleaning chamber;a lower nozzle coupling part provided at the sump and to which the lower nozzle is c

1. A dish washer comprising: a tub forming a cleaning chamber;a sump disposed at a lower portion of the tub and storing wash water;a lower nozzle injecting the wash water stored in the sump into the cleaning chamber;a lower nozzle coupling part provided at the sump and to which the lower nozzle is coupled;an upper nozzle injecting the wash water stored in the sump into the cleaning chamber;a water guide guiding the wash water from the sump to the upper nozzle;a first coupling mechanism used to couple a portion of the water guide to the sump; anda second coupling mechanism used to couple another portion of the water guide to the sump,wherein the first coupling mechanism comprises a water guide connection protruded from the sump, and wherein a lower end of the water guide is inserted into the water guide connection,wherein the first coupling mechanism comprises at least one hook formed on the water guide,wherein the second coupling mechanism comprises: a first coupling part protruded from an outer surface of the water guide; anda second coupling part protruded from the sump for coupling with the first coupling part, the second coupling part and the sump being formed as one body, and the second coupling part extending upwardly from the sump,wherein the second coupling part is spaced apart from the water guide connection,wherein the first coupling part is disposed above the hook,wherein the first coupling part is seated on the second coupling part when the lower end of the water guide is inserted into the water guide connection, andwherein the first and second coupling parts comprise coupling holes, a fastening member inserted through the coupling holes without passing through the sump. 2. The dish washer according to claim 1, wherein the water guide connection comprises a hook insertion hole for receiving the hook. 3. The dish washer according to claim 1, further comprising a sealing member disposed between the water guide and the water guide connection for preventing leakage of wash water. 4. The dish washer according to claim 1, wherein a plurality of second coupling parts are formed at the sump around the water guide connection. 5. The dish washer according to claim 1, wherein the first coupling part comprises a guide portion guiding the second coupling part when the first and second coupling parts are coupled to each other. 6. The dish washer according to claim 1, wherein the first coupling part is formed as an integral part of the water guide. 7. The dish washer according to claim 1, wherein the water guide comprises a coupling holder as an integral part for coupling with the first coupling part. 8. The dish washer according to claim 7, wherein the coupling holder comprises a groove for receiving the first coupling part. 9. A dish washer comprising: a sump storing wash water;a lower nozzle injecting the wash water stored in the sump into the cleaning chamber;a lower nozzle coupling part provided at the sump and to which the lower nozzle is coupled;an upper nozzle injecting the wash water stored in the sump into the cleaning chamber;a water guide guiding the wash water from the sump to the upper nozzle;a water guide connection protruding from the sump and connected to a portion of the water guide; anda coupling mechanism used to couple an additional portion of the water guide to the sump,wherein the water guide is provided with at least one hook,wherein the coupling mechanism comprises: a first coupling part protruded from an outer surface of the water guide; anda second coupling part protruded from the sump for coupling with the first coupling part, the second coupling part and the sump formed as one body, and the second coupling part extending upwardly from the sump,wherein the second coupling part is spaced apart from the water guide connection,wherein the first coupling part is disposed above the hook,wherein the first coupling part is seated on the second coupling part when the lower end of the water guide is inserted into the water guide connection, andwherein the first and second coupling parts comprise coupling holes, a fastening member inserted through the coupling holes without passing through the sump. 10. The dish washer according to claim 9, wherein the water guide connection comprises a hook insertion hole for receiving the hook. 11. The dish washer according to claim 9, wherein the second coupling part is formed near the water guide connection to a predetermined height for coupling with the first coupling part. 12. The dish washer according to claim 11, wherein the first coupling part is placed at a top portion of the second coupling part when the water guide is connected to the water guide connection. 13. A dish washer comprising: a sump storing wash water, the sump including a sump case storing wash water and a sump cover at an upper side of the sump case;a supply hole formed at the sump cover to discharge the wash water;a water guide connection protruded from the sump cover;a water guide connected to the water guide connection for receiving the wash water, the water guide having at least one hook;an upper nozzle connected to the water guide;a lower nozzle connected to the sump cover and provided under the upper nozzle;a first coupling part formed at an outer surface of the water guide; anda second coupling part protruding from the sump cover at a position close to the supply hole for coupling with the first coupling part, the second coupling part and the sump formed as one body, and the second coupling part extending upwardly from the sump,wherein the first coupling part is disposed above the hook,wherein the first coupling part is seated on the second coupling part when the water guide is inserted into the water guide connection, andwherein the first and second coupling parts comprise coupling holes, a fastening member inserted through the coupling holes without passing through the sump.