Dishwasher Vane Control for Filter Clog Removal
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Solution Overview
Problem
Dish washing machines often leave garbage at the bottom of the washing tub and on the filter, leading to user dissatisfaction and unpleasant experiences during dish removal.
Innovation Solution
A dish washing machine with a vane that moves between two positions to change the spray direction of washing water, allowing it to effectively remove garbage from the filter by rotating and deflecting the water to strike the rear wall of the tub, combined with a controller to manage the pump's rotation speed and water supply for efficient cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vane moves to change spray direction to remove garbage from the filter, then cleaning effectiveness is improved, but device complexity increases
Solution Approach 1:
The vane is designed to move between a first position (adjacent to the door) and a second position (adjacent to the nozzle), changing the spray direction dynamically. During drainage operation, the vane rotates toward the nozzle to deflect washing water onto the rear wall and filter, enabling effective garbage removal. This dynamic positioning resolves the contradiction by providing enhanced cleaning effectiveness only when needed, rather than requiring a permanently complex structure.
Solution Approach 2:
The vane serves multiple functions: it directs washing water to the door during washing operations and redirects water to the filter and rear wall during drainage operations. This multi-functionality allows a single component to address both washing and cleaning needs, improving reliability without proportionally increasing device complexity.
2Reliability
If washing water is sprayed at high pressure to remove garbage, then cleaning effectiveness is improved, but energy consumption increases
Solution Approach 1:
The system operates in distinct phases: during washing, water is sprayed at high pressure for effective cleaning; during drainage, the vane redirects water to clean the filter. The controller manages these periodic operations, ensuring high-pressure spraying is applied only when necessary for garbage removal, thereby balancing cleaning effectiveness with energy consumption.
3Reliability
If the vane rotates to deflect water onto the rear wall, then garbage removal is improved, but device complexity increases
Solution Approach 1:
The vane integration merges the functions of water direction control and filter cleaning into a single component. By rotating the vane to a second position adjacent to the nozzle, the system simultaneously deflects washing water onto the rear wall and directs it toward the filter, achieving effective garbage removal without requiring separate mechanisms for each function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures effective removal of garbage from the filter and bottom of the tub, improving washing performance and reducing user inconvenience by automatically washing the filter and preventing blockages, thus enhancing the overall cleaning experience.
Implementation Method 1
the vane rotates toward the nozzle to allow the washing water sprayed by the nozzle to face a rear wall of the washing tub
Implementation Method 2
a pump which pumps and supplies the washing water stored in the sump to the nozzle
Implementation Method 3
a filter installed on a bottom surface of the washing tub and filters garbage in the washing water
Implementation Method 4
a nozzle which is installed in the washing tub and sprays washing water
Data Source
AI summary
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.