Dishwasher Filter Self-Cleaning to Prevent Clogging and Odor
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Solution Overview
Problem
In dishwashers, the accumulation of foreign substances in the filter device leads to clogging, reduced water flow, and poor washing performance, along with potential bad smells due to decay, as these substances are not easily removable and can overload the washing water pump.
Innovation Solution
A dishwasher design incorporating a cleaning unit that continuously or intermittently cleans the filter during the washing process, especially during the washing step when foreign substances are most abundant, and performs filter cleaning during the rinsing step to prevent clogging and discharge foreign substances, thereby improving cleaning efficiency and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter device is used to filter foreign substances from washing water, then washing water quality is improved, but the filter device becomes clogged and requires cleaning
Solution Approach 1:
The filter device performs self-cleaning through a cleaning unit that removes accumulated foreign substances automatically during the washing cycle, eliminating the need for manual intervention and maintaining continuous operation without performance degradation
Solution Approach 2:
The cleaning unit operates continuously or intermittently during the washing step to prevent filter clogging, ensuring the filter device maintains its filtering function throughout the entire washing process without interruption or performance loss
2Reliability
If foreign substances are continuously accumulated in the filter device, then filtering function is improved, but water flow resistance increases
Solution Approach 1:
The cleaning unit operates periodically during the washing step to remove accumulated foreign substances from the filter device, maintaining optimal water flow characteristics while preserving the filtering function through regular intermittent cleaning cycles
3Reliability
If foreign substances are continuously accumulated in the filter device, then filtering function is improved, but pump unit is overloaded
Solution Approach 1:
The cleaning unit operates periodically during the washing step to remove accumulated foreign substances from the filter device, maintaining optimal water flow conditions and preventing excessive power consumption by the pump unit while preserving the filtering function
4Reliability
If foreign substances are continuously accumulated in the filter device, then filtering capability is improved, but bad smell is caused
Solution Approach 1:
The cleaning unit continuously or intermittently removes foreign substances from the filter device during the washing step, preventing accumulation that would lead to decay and bad smells while maintaining the filtering capability throughout the washing process
Data Source
AI summary
The present invention relates to a dishwasher and a control method thereof. According to one aspect, the dishwasher which washes dishes according to washing, rinsing, and drying steps comprises: a tub which is provided with a rack for accommodating dishes, and a washing nozzle for spraying washing water; a sump in which the washing water supplied to the tub is collected; a filter device which is provided to the sump, and allowing foreign substances of the washing water to be filtered; and a cleaning unit which clears away the foreign substances accumulated in the filter device.