Dishwasher and control method thereof

Abstract

Disclosed a control method of a dishwasher comprising a main-washing cycle for washing one or more washing objects which are held in a tub; a rinsing cycle for rinsing the washing objects washed in the main-washing cycle by injecting wash water; a normal drying cycle for drying the washing objects rinsed in the rinsing cycle, wherein the main-washing cycle comprises a pre-steam water supply step for supplying steam water to a sump so as to supply steam to the tub; a pre-steam supply step for generating steam by heating a heater and supplying the steam to the tub; a main-wash water supply step for supplying wash water for washing to the sump, without draining the steam water supplied to the sump; a main-washing step for washing the washing objects by circulating the supplied wash water; and a main-wash water drainage step for draining the wash water.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to Korean Patent Application No. 10-2016-0000560 filed on Jan. 4, 2016 in Korea, the entire contents of which is hereby incorporated by reference in its entirety.BACKGROUND OF THE DISCLOSURE[0002]Field of the Disclosure[0003]Embodiments of the present disclosure relate to a dishwasher a control method thereof.[0004]Background of the Disclosure[0005]Generally, a dishwasher is the electric appliance configured to remove food scraps or foreign substances from one or more dishwashing objects or dishes held therein by injecting wash water to the dishes.[0006]Such the conventional dishwasher includes a case defining an exterior appearance; a tub providing a washing space for dishes; one or more racks provided in the tub and holding washing objects therein; an injection arm for injecting wash water to the racks; a sump storing wash water; and a pump for supplying the wash water stored in the sump to the injection...

AI Technical Summary

Benefits of technology

The dishwasher has several advantages. It can supply steam to washing objects placed in front or rear portions of a rack, reducing the amount of water needed for drying. It can also remove foreign substances or food scraps by using only wash water without dishwashing liquid. Additionally, the dishwasher can use residual heat from a heater to prevent overheating and save energy. Finally, it can reduce the amount of water needed for washing and the duration of the washing process.

Problems solved by technology

In this instance, it is disadvantageously impossible to expose front portions of the washing objects to the steam supplied only to the washing objects put in both sides of the rack.

Furthermore, steam is injected only to the washing objects placed in both side areas of the rack and fails to be injected to the washing objects placed in a central area of the rack disadvantageously.

Still further, the steam is supplied only via the lateral surface of the tub and there is another disadvantage of failure in uniform temperature distribution in the washing space formed in the tub.

However, the amount of the hot wash water supplied to the dishes is disadvantageously increased in the final rinsing cycle.

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