Movable Filter Assembly for Self-Purging Dishwasher Sump
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Solution Overview
Problem
Dishwasher filter assemblies in existing appliances can easily become clogged or plugged during wash and rinse cycles, leading to reduced efficiency and the need for frequent maintenance.
Innovation Solution
A movable filter assembly within the dishwasher's sump that can shift between positions, allowing for self-purging and cleaning during drain cycles by reversing the flow of wash fluid, which helps to dislodge and remove clogged debris from the filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter assembly is positioned to surround the circulation pump, then it can filter fluid effectively, but it requires manual intervention to clear clogs
Solution Approach 1:
The filter assembly performs self-maintenance through automatic purging during drain cycles. The movable design allows the filter to reverse flow direction through itself, clearing debris and preventing clogs without requiring manual intervention. This self-service capability significantly reduces maintenance requirements while maintaining effective filter performance.
2Reliability
If the filter assembly is made movable between positions, then it can self-purge and reduce clogging, but the device complexity increases
Solution Approach 1:
The movable filter assembly design merges the filtration function with the purging function into a single integrated component. By combining these functions, the patent eliminates the need for separate purging mechanisms or additional complexity while achieving reliable clog prevention through the movable design.
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
This configuration ensures the filter assembly can automatically clean itself, reducing maintenance needs and extending its operational life by preventing clogs and ensuring reliable performance.
Implementation Method 1
a drain pump in flow communication with the recessed chamber of the bottom wall for urging a flow of wash fluid from the sump when activated
Data Source
AI summary
A dishwasher appliance including a tub defining a wash chamber is provided. The dishwasher appliance also includes a sump positioned at a bottom portion of the tub, the sump including a bottom wall that defines a recessed chamber. A drain pump is provided in flow communication with the recessed chamber defined by the bottom wall of the sump. Moreover, a filter assembly is positioned at least partially within the sump and movable along an axial direction of the sump between a first position and a second position. The filter assembly is positioned over the recessed chamber of the bottom wall when in the first position and is seated on the bottom wall of the sump around the recessed chamber when in the second position.