Dishwasher Water Guide Structure for Pressure and Leak Control
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Solution Overview
Problem
Dishwasher water guides made of plastic pipes face issues such as corrosion, damage from high-temperature washing water, stress concentration at bending portions, and water leakage due to high pumping pressure and connector separation.
Innovation Solution
The use of ductile stainless steel pipes for the water guide, with separate upper and top pipes to reduce water pressure, and a lower connector made of rubber with varying hardness to enhance sealing and prevent leakage, along with a clamp to secure the pipes, addresses these issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic pipes are used for the water guide, then the device complexity is reduced and ease of manufacture is improved, but the pipes corrode or break due to high-temperature washing water and steam
Solution Approach 1:
The patent changes the material parameter from plastic to stainless steel, which fundamentally alters the pipe's resistance to high-temperature washing water and steam. This material substitution resolves the reliability issue while maintaining manufacturability through standard stainless steel fabrication processes.
Solution Approach 2:
The patent employs stainless steel, a composite material containing chromium and other alloying elements, to create pipes that resist corrosion and high temperatures. The composite nature of stainless steel provides both durability and manufacturability, resolving the contradiction between reliability and ease of manufacture.
2Device complexity
If the upper pipe and top pipe are integrally formed, then the device complexity is reduced, but the amount of water flowing through the pipes is relatively high causing potential damage
Solution Approach 1:
The patent divides the water guide system into separate upper pipe and top pipe components. This segmentation reduces water pressure in each individual pipe by distributing the flow, thereby preventing damage while maintaining reasonable device complexity through modular construction.
3Adaptability or versatility
If bending portions are formed on the plastic pipes, then the adaptability of the water guide is improved, but stress concentration occurs causing corrosion or breakage at the bending portions
Solution Approach 1:
The patent changes the material parameter from plastic to stainless steel, which has superior strength and ductility properties. This allows the pipes to be bent into adaptive configurations without stress concentration causing corrosion or breakage, as stainless steel can withstand bending stresses much better than plastic.
4Productivity
If high pumping pressure is applied to the connector, then the productivity of water delivery is improved, but water leaks at the connector or the connector is separated
Solution Approach 1:
The patent changes the material parameter from plastic to stainless steel for the pipes connected to the connector. This material substitution allows the system to withstand high pumping pressures without connector separation or leakage, maintaining both productivity and reliability simultaneously.
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 improves the strength, hardness, and ductility of the pipes, preventing corrosion and leakage, while allowing for easy bending and reducing stress concentration, thereby enhancing the durability and efficiency of the dishwasher's water guide system.
Implementation Method 1
a lower connector made of rubber with varying hardness to enhance sealing and prevent leakage
Data Source
AI summary
The present invention relates to a dishwasher and a manufacturing method thereof.The dishwasher according to an embodiment of the present invention includes a water guide extending upward from a sump and supplying washing water to an upper nozzle and a top nozzle, and the upper pipe and the top pipe are separately provided to the water guide, so pressure of the washing water applied to the upper pipe and the top pipe can be reduced.