Dishwasher comprising a washing tank and a water circulation pipe
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Solution Overview
Problem
Existing dishwasher water circulation pipe fixing methods require additional stainless steel components, leading to increased costs and corrosion risks, especially for 'L' shaped pipes, and often necessitate the use of inserts which complicate assembly and may lead to leakage.
Innovation Solution
A dishwasher design featuring a plastic arch part with interlocking assembly elements that securely fix the water circulation pipe without the need for inserts, using complementary hooking lugs and receiving cavities, ensuring a reliable seal and reducing stress on the pipe during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional stainless steel components are used to fix the water circulation pipe, then the pipe can be securely fixed in the washing tank, but the manufacturing cost increases and corrosion risks arise
Solution Approach 1:
The arch part and water circulation pipe are both made of plastic material, creating a homogeneous material system that eliminates galvanic corrosion between dissimilar metals. The plastic arch part integrates the fixation function directly into the tank structure without requiring additional metal fasteners or supports.
Solution Approach 2:
The invention extracts the stainless steel fixation components from the system and replaces them with a plastic arch part that is an integral part of the washing tank structure. This removes the harmful metal components that cause corrosion while maintaining the fixation function.
2Reliability
If additional stainless steel components and inserts are used to fix the water circulation pipe, then the pipe can be securely fixed, but the device complexity and manufacturing steps increase
Solution Approach 1:
The arch part merges multiple functions into a single integrated component: it provides structural support for the tank, incorporates fixation elements (reception cavities or grooves) for the water circulation pipe, and eliminates the need for separate inserts or fasteners. This simplifies the overall fixation system while maintaining reliability.
Solution Approach 2:
The plastic arch part serves multiple functions simultaneously: it acts as a structural element of the washing tank, provides fixation for the water circulation pipe through integrated reception cavities or grooves, and eliminates the need for additional fixation components. This multi-functionality reduces device complexity.
3Reliability
If additional stainless steel components are welded or clinched to the bottom part of the tank, then the water circulation pipe can be held in place, but the risk of corrosion and degradation increases
Solution Approach 1:
Both the arch part and water circulation pipe are made of plastic material, creating a homogeneous material system that eliminates galvanic corrosion between dissimilar metals. This homogeneous construction extends the lifespan of the washing tank by removing the corrosion risk associated with metal-to-plastic or metal-to-metal connections.
4Reliability
If fixing means are arranged on the upper part of the crown part to fix C-shaped pipes, then the pipe can be secured, but the aesthetic appearance deteriorates and manufacturing complexity increases
Solution Approach 1:
The arch part merges the fixation function with the structural design of the washing tank's crown part. The reception cavities or grooves are integrated into the arch part itself, which is a visible component of the tank structure. This eliminates the need for separate, potentially ugly fixing brackets or fasteners that would compromise aesthetics.
Data Source
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AI summary
A dishwasher comprising a wash tub (1) having a base portion (21) and a crown portion (3), and a water circulation pipe (5) disposed inside said wash tub (1). The crown portion (3) includes at least one assembly element (34) and said water circulation pipe (5) includes at least one additional assembly element (51), said at least one assembly element (34) of said crown portion (3) and said at least one additional assembly element (51) of said water circulation pipe (5) being adapted to fit together so as to keep said water circulation pipe (5) fixed within the wash tub (1). The water circulation pipe is mounted in the wash tub simply and without the use of any additional parts.