Dishwasher Collecting Pot Guide Channels for Particle Removal
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Solution Overview
Problem
Dishwashers face issues with particle deposits in the collection pot, particularly grains of sand and fine-grained particles larger than the micro sieve opening size, which can cause blockages and damage to mechanical components and lead to caustic carryover.
Innovation Solution
A dishwasher design featuring a collection pot with guide channels that create an alternative flow path for rinsing liquid and fine-grained particles from the circulation area to the dirt collection area, bypassing the micro sieve, ensuring effective pumping out of particles larger than 1.5 mm and preventing contamination of the circulation pump circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a micro sieve with small opening size is used to filter particles, then the filtration effectiveness is improved, but fine-grained particles larger than the opening size can still form lumps and cause blockages
Solution Approach 1:
The collection pot is divided into two functional areas: a circulation area for washing liquid and a dirt collection area for pumped-out liquid. The micro sieve is positioned to separate these areas, allowing different handling of particles based on their location and size.
Solution Approach 2:
The base part with guide channels acts as an intermediary structure between the circulation area and dirt collection area. It provides an alternative flow path that bypasses the micro sieve, allowing particles that cannot pass through the sieve to be transported to the dirt collection area through gravitational flow along the guide channels.
2Reliability
If the collection pot geometry prevents particles from entering the suction area, then pump blockages are reduced, but fine-grained particles still accumulate in the circulation area
Solution Approach 1:
The guide channels provide a dynamic flow path that adapts to particle size. During pumping operation, the flow direction changes based on particle characteristics, allowing fine-grained particles to be redirected from the circulation area to the dirt collection area through the guide channels.
Solution Approach 2:
The guide channels are arranged in the base part at an azimuthal region, creating a three-dimensional flow path structure. This allows particles to be diverted laterally from the vertical circulation flow into the horizontal guide channels leading to the dirt collection area.
3Reliability
If guide channels are added to create an alternative flow path, then particle removal is improved, but the device complexity increases
Solution Approach 1:
The guide channels are integrated directly into the base part of the collection pot, merging the flow guidance function with the structural support function. This eliminates the need for separate guide components and reduces overall device complexity.
Solution Approach 2:
The base part serves multiple functions: it provides structural support for the collection pot, creates the separation between circulation and dirt collection areas, and forms the guide channels for particle transport. This multi-functionality reduces the number of separate components needed.
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 design ensures the complete removal of fine-grained particles and minimizes lye carryover, protecting mechanical components and maintaining the filter effect of the sieve element.
Implementation Method 1
the guide channels represent a connection from the circulation area to the dirt collection area of the collection pot. Rinsing liquid and the fine-grained particles it contains can thus get from the circulation area through the guide channels to the outlet connection
Implementation Method 2
The sieve element, which is typically also referred to as a micro sieve, is arranged between a circulation area and a dirt collection area of the collection pot, i.e. the micro sieve separates a first area of the collection pot, which can be assigned to the circulation of the washing liquid
Implementation Method 3
there is a drain pump nozzle which is connected to a drain pump for pumping out the washing liquid after the end of a washing process
Data Source
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AI summary
The dishwasher has a collecting pot (1) for receiving a washing liquid, and a microsieve (11) placed between a recirculation region (17) and a dirt collection portion (18) of the collecting pot. A circulating pump nozzle is provided with a circulation pump (4) for pumping the washing liquid during a flushing process. A drain pump connector (6) is provided with a drain pump (7) for pumping the washing liquid after completion of the flushing process. The collecting pot includes a bottom part formed with guide channels oriented to feed the washing liquid to a drain pump connector.