Dishwasher Sieve Detection Using a Turbidity Sensor
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Solution Overview
Problem
Dishwashers lack operational reliability due to the potential misinsertion or incorrect placement of the sieve arrangement, leading to unnecessary water consumption and inadequate rinsing results, as existing systems do not effectively detect the sieve's presence or proper positioning before starting a washing program.
Innovation Solution
Incorporating a sensor device that utilizes the existing turbidity sensor to detect the sieve arrangement through interaction with a sensing element, preventing the washing program from starting if the sieve is not correctly inserted, thus ensuring proper arrangement and reducing water wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sieve arrangement is not inserted or not correctly inserted into the collection pot, then the washing program can start without detection, but dirt particles are circulated and cleaning results are inadequate
Solution Approach 1:
The sensor device performs preliminary detection of the sieve arrangement's presence and correct insertion into the collection pot before the washing program starts. The control unit checks the sensor signal and only allows program execution when proper sieve insertion is confirmed, preventing inadequate cleaning results.
Solution Approach 2:
The sensor device provides feedback to the control unit about the sieve arrangement's status. The control unit receives this feedback and uses it to determine whether to permit or prevent program execution, ensuring reliable operation based on actual sieve insertion state.
2Productivity
If the sieve arrangement is not detected, then the washing program runs, but washing liquor that can still be used is discarded leading to high water consumption
Solution Approach 1:
The sensor device performs preliminary detection of the sieve arrangement before the washing program starts. By confirming proper sieve insertion in advance, the system avoids unnecessary draining of usable washing liquor, thereby reducing water consumption while maintaining productivity.
3Reliability
If a turbidity measurement shows contamination exceeds limit value, then washing liquor is discarded and replaced with fresh water, but this leads to unnecessarily high water consumption when the liquor could still be used
Solution Approach 1:
The sensor device performs preliminary detection of the sieve arrangement before turbidity measurement and washing program execution. By ensuring proper sieve insertion first, the system prevents circulation of dirt particles that would falsely inflate turbidity readings, thereby avoiding unnecessary draining of still-usable washing liquor and reducing water consumption.
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
Enhances operational reliability and reduces water consumption by ensuring the sieve arrangement is correctly positioned before each wash cycle, preventing the circulation of dirt particles and ensuring effective cleaning results.
Implementation Method 1
a turbidity sensor (13) to measure the turbidity of the washing liquor... a transmitting unit and a receiving unit, which are arranged at a distance from one another with the interposition of a measuring section
Data Source
Figure 1~3
Figure 4~5
Figure 6~8
AI summary
The invention relates to a dishwasher, in particular a program-controlled domestic dishwasher, with a washing compartment (3) that provides a washing compartment (4) and is used to hold items to be cleaned, a collection pot (10) into which the washing compartment flows, a circulation pump that is used to circulate the washing water which is connected to the collection pot (10), and with a sieve arrangement (16) which can be inserted into the collection pot (10), characterized by a sensor device (17) which is used to detect the sieve arrangement (16), having a ) arranged turbidity sensor (13) and with the screen assembly (16) cooperating sensing element (17).