dishwasher
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Solution Overview
Problem
Conventional dishwashers face issues with filtering stick-shaped foreign substances, which can block drainage paths and damage internal components, and lack an auxiliary handle for easy filter device detachment, making it difficult for users to remove foreign substances without interfering with internal components.
Innovation Solution
A dishwasher with a filter device featuring a first body with lateral circumferential holes and a second body with radially inner holes, ribs, and a mesh member, allowing efficient filtration of various-sized foreign substances and preventing drainage blockages, along with a handle for smooth detachment and reinstallation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional filter device is used without an auxiliary handle, then the structure remains simple, but the user must hold the filter device stacked with foreign substances making it difficult to detach
Solution Approach 1:
An auxiliary handle is introduced as an intermediary component to facilitate user interaction with the filter device. The handle provides a gripping surface that allows users to easily hold and detach the filter device without directly contacting the foreign substances trapped in the filter, solving the problem of difficult detachment while maintaining structural simplicity
2Ease of operation
If the filter device is detached from the sump cover, then foreign substances can be removed, but the foreign-substance plate is detached together and caught in the injection arm making it difficult to detach
Solution Approach 1:
The filter device and foreign-substance plate are designed to be detachably connected, allowing them to be removed together as a single unit. This merging of components simplifies the detachment process by enabling users to remove both parts simultaneously without worrying about the plate being caught in the injection arm, while still allowing for separate handling if needed
3Reliability
If stick-shaped foreign substances pass through the filter device, then the drainage path may be blocked, but the substances can damage the sump, pump or internal walls of the filter device
Solution Approach 1:
The filter device is segmented into multiple filtering layers with different mesh sizes. The outer filter captures larger stick-shaped foreign substances, while the inner micro-filter captures smaller particles. This segmentation ensures that stick-shaped substances are trapped at the first layer, preventing them from reaching and damaging the pump or blocking the drainage path, while also filtering smaller contaminants
Data Source
Figure 1
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Figure 4
AI summary
Disclosed is a dishwasher comprising a tub defining a washing space, a sump provided to collect the wash water injected into the tub, a supply pump provided to supply the wash water stored in the sump to the tub, a filter provided in the sump and comprising a first body having a plurality of first holes formed along a lateral circumferential surface; and a second body arranged in a radially inner side of the first body and having a plurality of second holes formed along a lateral circumferential surface, wherein the second body comprises an external wall portion in which the second holes are formed and an internal wall portion positioned in a radially inner side of the external wall and vertically extended.