Dishwasher and controlling method thereof

Abstract

A dishwasher is provided. The dishwasher includes a tub, a steam generator, and a connecting passage. The tub stores dishes. The steam generator generates steam to be supplied into the tub. The connecting passage connects a discharging end of the steam generator to an inside of the tub.

Description

TECHNICAL FIELD[0001]The present invention relates to a dishwasher.BACKGROUND ART[0002]A dishwasher is a home appliance that sprays high-pressure wash liquid within a tub to wash and remove food residue and other impurities left on surfaces of dishes. A filter filters the food residue from the wash liquid to recycle the latter, and detergent is dissolved into the wash liquid to facilitate the removal of food residue.[0003]In order to improve the above dishwashing process, the following dishwasher functions have been developed.[0004]First, by heating wash liquid to aid in dissolving the detergent, overall dishwashing effectiveness can be improved. Also, by heating wash liquid, the wash liquid can more easily remove glutinous rice and other hardened food residue.[0005]Furthermore, by dividing the wash cycle of a dishwasher into a pre-wash cycle and a main wash cycle, the pre-wash cycle soaks hardened food residue, so that it can be more easily removed in the main wash cycle.[0006]Anot...

AI Technical Summary

Benefits of technology

[0019]An advantage of the dishwasher and controlling method thereof according to the present invention is that they can easily remove food residue hardened on dishes to improve washing efficiency of the dishwasher.

[0020]Another advantage of the dishwasher and controlling method thereof according to the present invention is that soaking of dishes is performed quickly so that the duration of the dishwasher's washing cycle is reduced, thereby reducing the work performed by the pump and power consumption of the dishwasher.

[0021]A further advantage of the dishwasher and controlling method thereof according to the present invention is that they improve sterilizing efficiency of dishes for improved hygiene thereof.

[0022]A still further advantage of the dishwasher and controlling method thereof according to the present invention is that they satisfactorily clean dishes physically, chemically, and biologically at the same time, so that food residue can be more thoroughly removed from dishes.

[0023]An additional advantage of the dishwasher and controlling method thereof according to the present invention is that the spraying of wash liquid and then the supplying of steam is repeated, improving the cleanliness of dishes.

[0024]Another added advantage of the dishwasher and controlling method thereof according to the present invention is that hot steam can be discharged during a plurality of cycles, so that the efficiency of the dishwasher increases.

Problems solved by technology

However, despite the above devised methods according to the related art, the problem of increasing dishwashing efficiency remains.

Especially in oriental households, where in many cases, the staple food is glutinous rice, the latter is difficult to effectively remove from dishes, exasperating the problem of dishwashing efficiency.

Even the use of hot water to soak food residue cannot completely obviate the above problem.

Also, because soaking requires a prolonged amount of time, it lengthens the duration of the wash cycle.

Furthermore, because a dishwasher is used repeatedly, food deposits accumulate and harden on the inner surfaces of the tub, and a strong smell is emitted when this hardened residue is contaminated by germs.

Furthermore, even after dishes are washed, food residue and germs still remain on them.

Thus, the overall washing efficiency of a dishwasher is reduced.

Thus, the detergent is inefficiently used.

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