# US 10,244,918 B2 · Dish washer and method for controlling same

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- Number: US 10,244,918 B2
- Document ID: US10244918B2
- Status: Granted
- Kind: B2
- Application number: 15/976,996
- Filed: 2018-05-11
- Published: 2018-09-13
- Granted: 2019-04-02
- Earliest claimed: 2013-12-31
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Jung Chan Ryu; Woo Jin Shin; Soo Hyung Yoo; So Jeong Kim; Jun Ho Lee; Jae Man Joo; Sang Soo Choi
- Web page: https://patentgrep.com/patent/US10244918B2

## CPC

- A47L 15/4208: {Arrangements to prevent clogging of the filters, e.g. self-cleaning}
- A47L 15/0047: {Energy or water consumption, e.g. by saving energy or water}
- A47L 15/16: with rigidly-mounted spraying devices
- A47L 15/4221: {Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms (A47L15/0078 takes precedence)}
- A47L 15/4225: {Arrangements or adaption of recirculation or discharge pumps}
- A47L 15/4244: {Water-level measuring or regulating arrangements}
- A47L 15/4282: {Arrangements to change or modify spray pattern or direction}
- A47L 15/4289: {Spray-pressure measuring or regulating arrangements (nozzles A47L15/4278)}
- A47L 15/0031: {Water discharge phases}
- A47L 2401/06: Water supply, circulation or discharge information
- A47L 2401/08: Drain or recirculation pump parameters, e.g. pump rotational speed or current absorbed by the motor
- A47L 2401/14: Water pressure or flow rate
- A47L 2401/20: Time, e.g. elapsed operating time
- A47L 2401/24: Spray arms status, e.g. detection of spray arm rotation
- A47L 2401/34: Other automatic detections
- A47L 2501/03: Water recirculation, e.g. control of distributing valves for redirection of water flow
- A47L 2501/05: Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction
- A47L 2501/20: Spray nozzles or spray arms
- A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08)

## Abstract

Provided are a dish washing machine capable of effectively removing garbage which remains at the bottom of a washing tub and a filter and a method of controlling the same. When washing water is sprayed from a nozzle while a vane is positioned at a reference position during a drainage operation, since a deflection angle of the vane is bent back and the washing water is strongly sprayed toward a rear wall of a washing tub, the washing water may form a fast and strong water current over a bottom plate of the washing tub, and the fast and strong water current may remove garbage which remains at a filter while flowing over the bottom of the washing tub. Also, even when an excessive amount of garbage is accumulated at a filter at a top end of a sump and blocks the filter during a washing operation such as preliminary washing, main washing, etc., the filter is automatically washed using a small amount of water, thereby eliminating inconvenience of a user to directly separate and wash the filter. Also, washing performance may be effectively improved by precisely determining whether degradation in washing performance caused by a poor circulation of washing water occurs due to a filter blockage or generation of bubbles.

## Claims

### Claim 1

A method of controlling a dish washing machine which comprises a nozzle which sprays washing water, a pump which supplies the washing water to the nozzle, a vane which redirects the washing water sprayed from the nozzle to a dish, and a filter which filters garbage in the washing water, the method comprising:
identifying whether the vane arrives located at a position adjacent to the nozzle in response to a drainage operation;
rotating the vane approaching the position adjacent to the nozzle;
stopping a movement of the vane based on whether the vane arrives at the position adjacent to the nozzle; and
spraying the washing water from the nozzle by driving of the pump, where the washing water sprayed from the nozzle is redirected to a rear wall by the rotated vane and strikes the rear wall.

### Claim 2 (depends on 1)

The method of claim 1, wherein the garbage which remains at the filter is removed by the washing water having struck the rear wall.

### Claim 3 (depends on 1)

The method of claim 1, further comprising moving the vane to the position adjacent to the nozzle based on the vane does not arriving at the position adjacent to the nozzle.

### Claim 4 (depends on 1)

The method of claim 1, wherein the driving of the pump comprises adjusting an amount of the washing water sprayed from the nozzle by controlling a rotation speed of the pump.

### Claim 5 (depends on 1)

The method of claim 1, wherein the driving of the pump comprises adjusting an amount of the washing water sprayed from the nozzle by controlling a driving time of the pump.

### Claim 6 (depends on 1)

The method of claim 1, further comprising identifying a blockage of the filter based on a variation in power consumption of the pump and a reduction in the power consumption of the pump.

### Claim 7 (depends on 1)

The method of claim 1, wherein the garbage which blocks the filter is removed by controlling a water supply amount of the washing water and a rotation speed of the pump.

### Claim 8 (depends on 7)

The method of claim 7, wherein the controlling of the water supply amount of the washing water comprises supplying a water supply amount of the washing water for washing the filter that is less than a water supply amount of the washing water for a washing operation.

### Claim 9 (depends on 7)

The method of claim 7, wherein the controlling of the rotation speed of the pump comprises controlling a rotation speed of the pump driven for washing the filter to be lower than a rotation speed of the pump driven for a washing operation.