Dishwasher Filter Housing With Inclined Rib for Sump Protection
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Solution Overview
Problem
Conventional dishwashers face noise, vibration, and malfunction issues due to large foreign substances entering the sump, which can clog drainage channels and disrupt the operation of drainage pumps.
Innovation Solution
A filter housing with a peripheral portion featuring recovery holes and an inclined rib is designed to filter out large foreign substances while maintaining a sufficient wash water inflow rate, guiding wash water effectively and preventing large substances from entering the sump, thereby reducing noise and vibration and minimizing the risk of pump malfunction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter is installed at the upper surface of the sump to filter out foreign substances, then foreign substances can be prevented from entering the sump, but large foreign substances can still pass through and cause clogging or malfunction
Solution Approach 1:
The filter housing is divided into multiple functional sections: a filter coupling portion with a filter for general filtration, and a peripheral portion with recovery holes and an inclined rib for specific large substance interception. This segmentation allows each part to handle different sizes of foreign substances, improving overall reliability without excessive complexity.
Solution Approach 2:
The inclined rib acts as an intermediary structure between the recovery holes and the sump. It intercepts large foreign substances before they can enter the sump through the recovery holes, while still allowing wash water to pass through. This intermediary element prevents pump malfunction without requiring a completely complex filtration system.
2Ease of manufacture
If the filter structure is simplified to reduce complexity, then manufacturing becomes easier, but large foreign substances may enter the sump and cause noise and vibration
Solution Approach 1:
The filter housing combines a simple filter structure with a peripheral portion featuring recovery holes and an inclined rib. This segmented design maintains ease of manufacture for the basic filter while adding the inclined rib structure that specifically addresses noise and vibration by preventing large substance entry.
Solution Approach 2:
The inclined rib is designed with a curved surface that guides wash water smoothly while blocking large foreign substances. The curved geometry is easier to manufacture than sharp angles and effectively redirects water flow while preventing large objects from entering the sump, thus reducing noise and vibration.
3Productivity
If recovery holes are provided in the peripheral portion to increase wash water inflow, then wash water flow rate improves, but large foreign substances may enter through these holes
Solution Approach 1:
The inclined rib positioned at the lower surface of the peripheral portion acts as an intermediary that allows wash water to pass through the recovery holes while blocking large foreign substances. This maintains high productivity through sufficient water inflow while preserving reliability by preventing large substance entry.
Solution Approach 2:
The inclined rib creates a local quality difference in the peripheral portion: areas with recovery holes allow water passage for high inflow rate, while the inclined rib structure at the lower surface provides selective blocking for large substances. This local differentiation achieves both high productivity and reliability.
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 effectively reduces noise and vibration during dishwasher operation and lowers the likelihood of drainage pump malfunctions by ensuring efficient filtration and flow management, enhancing the reliability of the appliance.
Implementation Method 1
an inclined rib formed at a lower surface of the peripheral portion to be inclined downward
Implementation Method 2
a filter coupling portion having a filter coupled thereto to filter out a foreign substance contained in the wash water overflowing the sump
Data Source
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AI summary
A dishwasher (10) is disclosed. The dishwasher (10) includes a sump (100), a filter housing (300) coupled to an upper portion of the sump (100), and a filter (120) coupled to a central portion of the filter housing (300), wherein the filter housing (300) includes a filter coupling portion (310) having the filter (120) coupled thereto, a peripheral portion (330) arranged outside the filter coupling portion (310) and provided with a recovery hole frame (341, 343, 345), wherein a recovery hole (331, 353) allowing the wash water to pass therethrough is formed inside the recovery hole frame (341, 345), and an inclined rib (350) formed at a lower surface of the peripheral portion to be inclined downward.